RSF Woodburning Fireplaces FOCUS 320 User manual

RSF-IIF320 – 2012-07
Owner's Manual
Residential Factory Built Fireplace
Operation • Maintenance • Installation
FOCUS 320
Keep these instructions for future use.
Industrial Chimney Company Inc.
400 J.-F. Kennedy, St-Jerome, QC, Canada, J7Y 4B7
Telephone: [phone]
www.icc-rsf.com

FOCUS 320 Owner's Manual 2 RSF Woodburning Fireplaces
Dear Customer,
The FOCUS 320 incorporates technology with elegance to give you a beautiful view of the fire
without compromising on heating efficiency or environmental quality.
We have designed your new FOCUS 320 to be easy to install, operate and maintain. It is in
your best interest to become familiar with it. Study your manual to be sure that the installation
is correct, then follow the guidelines for operation and maintenance.
We at RSF Woodburning Fireplaces congratulate you on your choice of the FOCUS 320,
and are confident that you have purchased a fireplace that is simply, the best.
Sincerely,
RSF Woodburning Fireplaces Team
July 2012
TABLE OF CONTENTS
SAFETY FIRST 3
DO'S AND DONT'S3
CREOSOTE:FORMATION AND REMOVAL 3
GENERAL SPECIFICATIONS 4
THE COMBUSTION CONTROL SYSTEM 4
OPTIONS 4
UNIT DIMENSIONS AND CLEARANCES 5
OPERATION 7
AIR CONTROLS 7
BURN TIME VS.HEAT OUTPUT 7
FUEL 7
FIRST FIRES 8
LIGHTING 8
REFUELING 8
TROUBLESHOOTING PROBLEMS 8
MAINTENANCE 9
GENERAL CLEANING 9
PAINT 9
GLASS CLEANING 9
CHIMNEY CLEANING 9
DISPOSAL OF ASHES 9
DOOR ADJUSTMENT 10
LOUVERS 10
INSTALLATION 10
LOCATION 11
MOBILE HOME INSTALLATION 14
CEILING CLEARANCE 14
STANDOFFS INSTALLATION 14
SECURING THE FIREPLACE IN PLACE 15
OUTSIDE AIR DUCT 15
CHIMNEY 15
CHIMNEY INSTALLATION 16
OFFSET CHIMNEY 17
CHASE ENCLOSURE 18
MASONRY CHIMNEY 18
FRAMING 20
COVERING THE FIREPLACE FACING 20
MANDATORY OPTIONS WITH THE CLEAN FACE 20
HEARTH EXTENSION 20
BENEATH HEARTH EXTENSION 20
MANTEL 21
REFRACTORY BRICK INSTALLATION 21
LISTING LABEL 22
COMPLETE OPTIONS LIST 23
CONFIGURED OPTIONS LIST 24
REPLACEMENT PARTS 25
LIMITED WARRANTY 27

FOCUS 320 Owner's Manual 3 RSF Woodburning Fireplaces
SAFETY FIRST
DO'S AND DONT'S
If this fireplace is not properly installed, a house fire could result. For your safety, follow the installation
directions. Contact your local authority having jurisdiction (such as municipal building department, fire
department, fire prevention bureau, etc.) regarding restrictions and installation requirements, and the
need to obtain a permit.
To ANYONE using this fireplace: these DO's and DONT's are for your safety.
1. DO read this instruction manual before lighting your first fire.
2. DO burn seasoned wood fuel or densified fuel logs.
3. To avoid glass breakage, DO NOT slam the fireplace door.
4. DO NOT ever use gasoline, gasoline-type lantern fuel, kerosene, charcoal lighter fluid or similar liquids to
start or freshen up a fire in this fireplace. Keep all such liquids well away from the fireplace while it is in use.
5. DO NOT overfire the fireplace. If you are unable to slow down the burn rate of the fire or if the
chimney connector behind the top louver glows red, you are overfiring the fireplace.
6. DO operate the fireplace with the door fully closed. If the door is left partly open, gas and flame can be
drawn out of the fireplace opening, creating both fire and smoke hazards.
7. DO keep all combustible materials (furniture, firewood, etc.) at least 4' away from the front of the fireplace.
8. DO NOT use a fireplace grate or other products not specified for use with this fireplace.
NOTE: We strongly recommend that our products be installed and
serviced by professionals who are certified by the National Fireplace
Institute in the U.S. or by Wood Energy Technology Transfer Inc. in
Canada.
CREOSOTE: FORMATION AND REMOVAL
When wood is burned slowly, it produces tar and other organic vapors which combine with the expelled moisture
from the wood to form creosote. The creosote vapors can condense in the relatively cool chimney of a slow
burning fire. When ignited, this creosote makes an extremely hot fire. The chimney should be inspected
periodically during the heating season to see if a creosote build-up has occurred. If a significant layer of creosote
has accumulated (1/4" or more), it should be removed to reduce the risk of chimney fire.
WARNING: BURN DRY WOOD ONLY.
DO NOT BURN: DRIFTWOOD, TREATED WOOD, COAL, GARBAGE, OR PLASTIC.
Do not use construction scraps (e.g. 2x4 or plywood scraps) as your only supply of fuel as you can overheat and
seriously damage the fireplace. We do not recommend using wax fuel logs (e.g. Duraflame) in this fireplace
because it will dirty the glass. If you choose to use them, do not use more than one at a time and do not poke or
stir the log while it is burning. Use only firelogs that have been evaluated for fireplace use. In Canada, they should
meet the requirements of ULC/ORD-C127-M1990. Refer to the firelog warnings and caution markings prior to
use.

FOCUS 320 Owner's Manual 4 RSF Woodburning Fireplaces
GENERAL SPECIFICATIONS
The FOCUS 320 fireplace is environmentally friendly as well as efficient. It is approved by the United States
Environmental Agency (EPA) at an emission rate of 4.5 grams per hour.
THE COMBUSTION CONTROL SYSTEM
Since the door is sealed, all combustion air must come through the FOCUS 320's draft control. This control has a
bimetal coil to allow more air when the unit is cold, and less air when the unit is hot, guarding against overheating.
It can be controlled either manually with the lever that is located on the right below the door, or automatically with
an optional electric wall thermostat (FO-FDHC4).
For the first few days, it is best to operate the fireplace with the manual control fully open (moved to the right as
far as possible). Just control the fire as you would any normal fireplace, using one or two logs at a time for a
smaller fire, or more logs for more heat. Once you become familiar with operating the fireplace with the control
open, you can start experimenting with lower settings. Remember: when the fireplace is hot, the control will not
need as much movement to reduce the fire as when it is cold. The bimetal coil will already have shut the damper
part way.
OPTIONS
There are different ways you can finish your FOCUS 3201fireplace. You can choose to install the louvers it came
with or with no louvers at all (FO-F2).
If you choose to install your FOCUS 320 fireplace without any louvers, you MUST install the Clean Face Option
(FO-F2) along with two Gravity Vent Kits (FO-V2). Gravity vent dampers CANNOT be installed on a Clean Face
FOCUS 320. Furthermore, we recommend that you do not install any option requiring electricity or a thermal
switch inside your fireplace since it will be difficult to access those components after the fireplace facing is
covered with non-combustible materials. If you decide nevertheless to install electricity or a thermal switch in your
Clean Face FOCUS 320, remember that you may eventually have to break through the non-combustible finishing
to access the electrical box or the thermal switch for servicing.
To simplify the installation of thin non-combustible materials such as ceramic tile or sliced brick, we have
designed a rock retainer kit. It is not designed or required for full brick or stone. With a Louvered FOCUS 320, you
can choose to leave all the black metal completely exposed or completely covered with non-combustible material.
Whether you have chosen a Louvered or Clean Face FOCUS 320, the FO-KN kit will help you finish the facing of
the fireplace as you wish. Thin materials can also be installed directly on the face of the FOCUS 320 using high
temperature silicone as glue, without a rock retainer kit.
Decorative andirons (FO-A) are also an optional feature. The decorative andirons are made of cast iron and are
more aesthetically appealing than the basic ones included with the fireplace. The decorative andirons are also
taller, which reduces the chance of logs rolling forward.
For increased air circulation and marginally more heat output, you can add the Circulating Internal Blower (FO-
FDHB5-N) to your Louvered FOCUS 320 or the Inline Fan (FO-CIF) to your Clean Face FOCUS 320.
NOTE: The FOCUS 320 is equipped with a floor shield to protect the floor under the fireplace. This floor shield
is made of two parts: the front part is insulated; the back part is a single layered sheet metal. Both parts are
screwed together and factory installed to cover the entire floor below the firebox. It must never be removed. Only
when installing the Internal Blower Option can the floor shield be modified. Follow the internal blower installation
instructions but before reinstalling the floor shield, remove the screw, slide the back part over the front part and
screw them back together. If you ever remove the internal blower make sure to extend the shield again.
If you have any rooms directly above or adjacent to the room with the fireplace that you would like to heat, you
may want to consider the Gravity Vent Kit2(FO-V2). The gravity vent distributes hot air to these rooms without the
need for a blower. With a Louvered FOCUS 320, you could also consider installing Dampers (FO-D) on your
gravity vents. The dampers will enable you to choose between sending the heated air to the gravity vent outlet or
keeping it in the fireplace room.
For constant heat, day and night on a Louvered FOCUS 320, you will be surprised by what the Thermostat Option
(FO-FDHC4) can do for you. This option provides you with the necessary parts to automatically control the draft
1You can also refer to the configured option list on page 24.
2Not allowed in a mobile home installation.

FOCUS 320 Owner's Manual 5 RSF Woodburning Fireplaces
control via a wall thermostat. It will keep your room temperature as even as though you were heating with oil, gas
or electricity. Do not install this Thermostat Option (FO-FDHC4) on a Clean Face FOCUS 320 because of the
reduced air circulation below the firebox; the motor used in the option is not meant to work under such high
temperature and this will greatly reduce the motor life span.
To maximize the distribution of the heat generated by your FOCUS 320 fireplace throughout many rooms and
different floors, consider the Central Heat Option2. With our Central Heat Blower (FO-FDHB6-1), you can use the
house central heating ducts or dedicated ducts to circulate the fireplace heat to one or many rooms. The Central
Heat Control (FO-FDHC6) will enable automatic control of the Central Heat Blower via a wall thermostat and
thermal switch. The Zone Heat Control (FO-FDHCZ1) along with Zone Damper Kits (FO-FDHCZ2) will provide the
same features as the Central Heat Control but for more than one heating zone. If you wish to install the Central
Heat Blower on a Clean Face FOCUS 320, you will need the Central Heat T (FO-T) that will enable you to
connect the central heat duct along with the left gravity vent on the fireplace.
For a simple way to circulate a moderate amount of warm air from the fireplace to another room, we offer the Heat
Dump Kit (FO-HD). It includes a 180 cfm blower and is most often used to provide supplemental heating to a
basement room when the fireplace is on the main floor, but it can also be used to send the warm air to an
adjacent room or upstairs.
NOTE: Many options require wiring and/or electricity for their installation. If there is any chance that any of these
options will be installed in the future then suitable wiring should be run during framing. Otherwise, it will be difficult
to install these options later. You can refer to page 23 for a list of options that require electricity.
Detailed installation instructions are included in the box with each option. These can also be obtained from our
Internet Web Site: www.icc-rsf.com.
WARNING: THIS FIREPLACE HAS NOT BEEN TESTED WITH A GAS LOG SET (UNVENTED OR
VENTED). TO REDUCE RISK OF FIRE OR INJURY, DO NOT INSTALL A GAS LOG SET (UNVENTED OR
VENTED) INTO THIS FIREPLACE. DO NOT INSTALL A GAS LOG LIGHTER BECAUSE THE HEAT
PRODUCED BY THE FIREPLACE WILL PERMANENTLY DAMAGE THE GAS LOG LIGHTER.
UNIT DIMENSIONS AND CLEARANCES
Figure 1 Unit Dimensions and Clearances
39"
16 3/4"
29 3/4"
24"
8"
4"
42"
47"
6 1/2"
5"
13 1/2" 13 1/2"
43"
4 1/4"
4"
5"
18 1/2"
Refer to Table 1 (G)
for minimum depth
of hearth extension
Refer to Table 1
(B) for minimum
distance of side
wall to the
fireplace
Refer to Table 1 (H)
for minimum width
of hearth extension
Non-combustible hearth extension
and spark guard () (refer to Table1
(I) and text for particulars)
Refer to
Table 1 (J)
for maximum
mantel shelf
depth
Refer to Table 1 (K)
for minimum mantel
shelf height above
the door opening

FOCUS 320 Owner's Manual 6 RSF Woodburning Fireplaces
Table 1 Unit Dimensions and Clearances
A Distance of combustible material from side, back and top standoffs 0" (0,0 mm)
B Minimum distance from the side wall to the side of the firebox opening 12" (305 mm)
C Minimum ceiling clearance: from the base of the fireplace to
the ceiling
sealed enclosure
vented enclosure
7'
6'
(2,13 m)
(1,83 m)
D Minimum chimney height: minimum total chimney height from fireplace top to
below the chimney rain cap – Refer to Table 3 on page 15 if elbows are present 12' (3,66 m)
E Maximum chimney height: maximum total chimney height from fireplace top to
below the chimney rain cap 40' (12,19 m)
F Maximum chimney height supported by the fireplace 18' (5,49 m)
G Minimum depth of non-combustible hearth extension: from the front of the fireplace 20" (508 mm)
H Minimum width of non-combustible hearth extension: total width, must be centered
on the firebox opening 42" (1,07 m)
I Minimum width of the spark guard 36" (914 mm)
J Maximum mantel shelf depth (see Table 2 for other mantel sizes) 12" (305 mm)
K
Minimum height of a combustible mantel shelf above the top of the firebox opening:
to the bottom of the combustible mantel (refer to the "Installation: Mantel" section
for particulars)
See Table 2
Table 2 Various Mantel Shelf Depths and Corresponding Installation Heights
Maximum Mantel Shelf Depth Minimum Installation Height
0" to 6" 20"
12" 26"
No combustible mantel shelf can be installed lower than 20" above the top of the firebox opening. A combustible
mantel shelf cannot be deeper than 12".
For any combustible mantel shelf depths between 6" and 12", you can calculate the minimum installation height.
For example:
•Mantel shelf depth to be installed: 9¼"
•So: (9.25 – 6) + 20 = 23.25 = 23¼"
•Thus minimum installation height of a 9¼" mantel: 23¼" above the firebox opening
If the combustible mantel shelf has a cross-section with variable depth, it has to be installed so that its widest
part is not installed lower than the corresponding minimum installation height while making sure that the lowest
point of the mantel is not installed lower the minimum installation height corresponding to it depth.
Refer to the "Installation: Mantel" section for particulars.

FOCUS 320 Owner's Manual 7 RSF Woodburning Fireplaces
OPERATION
AIR CONTROLS
Combustion Air Control
Unlike most open fireplaces, RSF fireplaces don’t have flue dampers. Instead,
the system is sealed by closing the door, and the amount of air entering the
firebox is controlled by the combustion air control lever on the front of the
fireplace on the right below the door (see Figure 2) which can be moved left
or right. Setting the air control lever all the way open (towards the right) will
allow the maximum amount of air into the firebox. Closing the air control
(towards the left) will reduce the amount of air entering the firebox.
Bi-metallic Damper
The bi-metallic damper is a unique feature built into your FOCUS 320
fireplace. As the fireplace heats up it will activate the bi-metallic damper. This
will automatically begin to shut down the air entering the firebox, slowing the
combustion process. This will save you wood in the long run, and prevent the
fireplace from overheating and causing potential damage to the firebox. We
suggest that the combustion air control lever is used as the primary
control to limit the oxygen entering the firebox, and that the bi-metallic
damper is left as an additional safety system.
Outside Air Control
The FOCUS 320 is designed to use outside air for combustion.
Because outside air is generally colder and denser it will help to start the fire. In some cases, fresh air will help
compensate for negative pressure problems within the house; however it will not prevent the fireplace from
smoking in a severely depressurized house.
We recommend always using outside air for combustion but you may choose to use room air for combustion
instead. You will find a sliding door behind the bottom louver and below the firebox. Push the sliding door towards
the back to select outside air or pull it toward the front to select inside air as the combustion air.
If the fireplace is installed in a mobile home, the outside air MUST be used as combustion air.
BURN TIME VS. HEAT OUTPUT
The faster your fireplace burns the more heat it will create; however, faster fires result in much more hot air flow
up the chimney which means you are sacrificing efficiency. Fast burning fires (lots of air) go through much more
wood than slow burning fires. To get the most out of your FOCUS 320 fireplace, adjust the combustion air control
lever at the appropriate time. If the fire seems to be burning too quickly, turn the air down. If the fire is smoldering
and there are no visible flames, turn the air up. This way you’ll always be getting the most out of your fuel.
FUEL
All modern high efficiency fireplaces and woodstoves are designed to burn best with seasoned cordwood.
Seasoned wood can be defined as wood that has been cut, split and let dry under cover for a minimum of 6
months, preferably a year or more. Dry seasoned wood generally contains less than 20% moisture content.
Attempting to burn fuel with an high moisture content will be difficult and result in lower efficiency, increased
creosote buildup and dark deposits on the glass. It’s possible to burn a very large amount of wood, and get very
little heat if the wood is wet.
The type of wood you select is also important. All types of wood give off more or less the same number of BTU’s
per pound. Since softer woods are less dense than hardwoods it is possible to put more weight of hardwood in
the firebox; in other words all woodburning appliances will burn longer and more evenly with hardwoods. Never
burn scrap, garbage, treated wood or driftwood as they produce much more pollution and can corrode the firebox
and chimney as well. Burning large amounts of paper, cardboard, mill ends or construction waste can easily over
fire and damage the fireplace or even ignite a chimney fire if the flue is dirty.
Figure 2 Combustion Air
Control
CLOSE
OPEN

FOCUS 320 Owner's Manual 8 RSF Woodburning Fireplaces
FIRST FIRES
You will experience a slow start-up during the first few fires. The refractory bricks lining the firebox contain
moisture from manufacturing and require a few hot fires to evaporate the moisture. While there is still moisture in
the bricks, they will be black with smoke deposits. When the moisture has dissipated, the bricks will turn white.
Unlike cast iron stoves, there is no need to cure the fireplace itself by starting with small fires and progressively
larger ones. Feel free to light a large fire from the very start.
You will experience a slight odor during the first few fires. This odor comes from curing paint and oil burning off
the metal. The odor may be strong enough to set off your smoke detector. Open the doors and windows to allow
the room to properly ventilate.
LIGHTING
Ensure that the combustion air control lever is all the way in the open position. You will want as much air as
possible for the lighting process.
Start by laying your fire starter and kindling. Traditional fire starter is crumpled newspaper; make sure to use
enough to light the kindling (5-6 pieces should do). Next lay the kindling crisscrossed over the newspaper. Using
plenty of kindling ensures that the chimney will heat up quickly and establish a strong draft, never use any
flammable liquids. Light the paper and close the door most of the way, but don’t shut it completely. If the door is
positioned correctly you will see air rushing into the fireplace, this will help the lighting process.
Once the kindling is lit and sustaining fire, you can add some small pieces of seasoned cordwood. Use the
andirons in front to help position the cordwood so as not to flatten and smother the fire you’ve just created.
Always add at least 3 pieces of cordwood. Position your cordwood in a manner that the fire will hit several pieces
as it rises and has air gaps to flow through. Continue to leave the door slightly open until the cordwood is lit. Close
the door completely when the fire is established, if the fire goes out you’ve shut the door too early.
To get maximum efficiency out of your fireplace you will want to adjust the amount of air entering the firebox at the
appropriate times. Gauge how much to close the combustion air by how the fire reacts once the combustion air
control lever has been moved. If the fire goes out and begins to smolder, there’s too little combustion air entering
the firebox. If there’s no change to the burn pattern, you can continue to close the combustion air further.
Eventually, you should be able to close the combustion air all or most of the way. There should always be visible
fire inside the firebox at every step of the process.
WARNING: DO NOT USE A GRATE OR ELEVATE THE FIRE.
WARNING: MAKE SURE TO KEEP THE FIRE BEHIND THE ANDIRONS. REPLACE THE LOGS IF THEY
FALL AGAINST THE GLASS.
REFUELING
The door should be opened slowly to keep smoke from spilling into your room. If you have a problem with smoke
spillage, check to see that all kitchen and bathroom fans have been shut off. They can cause negative pressure in
the house which pulls smoke out of the fireplace.
NOTE: The central heat and internal blowers, if installed, should be shut off during refuelling to prevent smoke
from spilling out of the fireplace.
TROUBLESHOOTING PROBLEMS
If smoke comes into the house when the door is opened:
•You may have opened the door too quickly and created a suction of air into the room, this can be avoided by
opening the door more slowly.
•Ensure your chimney is clean and your chimney cap is not plugged. Chimney caps with screens are more
likely to become clogged with creosote buildup.
•Make sure you have adequate chimney height for your system. Refer to the Chimney section of this booklet
and make sure to take altitude, and number of elbows into consideration.
•If you have purchased the central heat kit option or the circulating internal blower, make sure the blower is off
before opening the door.

FOCUS 320 Owner's Manual 9 RSF Woodburning Fireplaces
•Check to see if other fans in the home are running, particularly a kitchen range hood, or bathroom exhaust
fan. This can affect the pressure in the home.
•Try opening a window near the fireplace a little, this will equalize the pressure in the home and should correct
a draft problem. Once proper draft is established the window can be closed.
•Make sure you’ve used enough kindling to establish a hot fire quickly. The most likely time that smoke will
enter the home is during the lighting process.
MAINTENANCE
GENERAL CLEANING
The high heat paint and plating can be cleaned with a soft damp cloth. Use a mild detergent and water. Do not
use abrasive cleaners.
PAINT
You can touch up the face of the FOCUS 320 with Stove Bright Metallic Black high temperature paint which is
available at most fireplaces dealers. Follow the directions outlined on the spray can. DO NOT attempt to paint the
fireplace while it is still warm. Keep the spray can away from any source of heat or open flame. Ensure that there
is adequate ventilation in the room from the time you start painting until the paint is dry. Stove Bright is available
in a wide range of colors if you want to change the color of your FOCUS 320.
We recommend that you take the time to protect or remove any item that you do not want to paint such as: the
door glass, the plated door, the fireplace surroundings, etc. The glass can be removed from the door but you will
have to replace the window gasket.
GLASS CLEANING
In a controlled combustion firebox, temperatures are not always high enough to keep the glass perfectly clean. A
good hot fire once a day usually cleans off most of the deposits that have accumulated. Remember: the drier the
wood and the hotter the fire, the cleaner the glass. A word of caution: although heat will not break the glass,
impact can. Be careful not to hit the glass.
WARNING: NEVER CLEAN THE GLASS WITH AN ABRASIVE CLEANER. USE ONLY A CLEANER
RECOMMENDED BY YOUR DEALER. NEVER CLEAN THE GLASS WHILE IT IS HOT, A SERIOUS BURN
CAN RESULT. THERE ARE A NUMBER OF EXCELLENT WOOD STOVE GLASS CLEANERS AVAILABLE
WHICH ARE FAR SUPERIOR TO REGULAR GLASS AND OVEN CLEANERS FOR WOOD STOVE
APPLICATIONS.
CHIMNEY CLEANING
Check the chimney for creosote buildup every week or so until experience shows how often you need to clean it.
A buildup of ¼" or more should be cleaned before more creosote accumulates. Use an 7" round brush. The baffle
in the firebox can be removed to gain access to the flue from below.
Follow the directions in the Refractory Brick Installation section to remove and replace the baffle. If you prefer,
you can simply lift the baffle and move it forward and let the debris fall in the firebox. Do not forget to push the
baffle back in its place after cleaning the chimney. This second option is much easier than removing the baffle.
DISPOSAL OF ASHES
Remove the ashes before they become too deep, i.e., before you have a spillage problem when you open the
door.
The ashes should be placed in a metal container with a tight-fitting lid. The closed container of ashes should be
placed on a non-combustible floor or on the ground, well away from all combustible materials pending final
disposal. If the ashes are disposed of by burial, or otherwise locally dispersed, they should be retained in the
closed container until all cinders have thoroughly cooled.

FOCUS 320 Owner's Manual 10 RSF Woodburning Fireplaces
DOOR ADJUSTMENT
To check for a proper door seal, insert a sheet of paper between the door and the front of the fireplace and latch
the door. Pull gently but firmly on the sheet of paper. If the paper either tears or is hard to retrieve, the adjustment
is correct. Repeat this procedure along all sides of the door.
The most important factor for controlling the burn rate of the FOCUS 320 is a good seal on the door gasket. If the
door gasket is worn or damaged to the point where the seal is not adequate as described above, then remove
and replace the gasket. Replacement kits are available from your RSF dealer.
The door latch is progressive, the more your turn the handle the tighter the seal on the right side of the door.
Beware not to always over tighten the door latch; this will result in premature failure of the door gasket or cause
undue stress on the door handle.
If needed, the hinges can be adjusted to improve the alignment of the door latch with respect to the hole in the
fireplace facing, and for easy installation/removal of the door.
NOTE: An improperly adjusted door seal can have a significant effect on the performance and durability of the
fireplace. A poorly adjusted door can result in reduced efficiency, over firing, excessive wood consumption and
premature fireplace failure.
LOUVERS
Both top and bottom louvers are factory installed. On occasion, you may need to remove either one. Just follow
the steps below.
To remove the top louver:
1. Grab the louver with both hands.
2. Slowly lift the louver while pushing the top of the louver farther inside the fireplace casing.
3. Once the louver is against the top of the casing, move it back to disengage the louver from the two supports,
one at each end of the louver.
4. Turn the louver on its side to bring it back out through the louver opening in the facing of the fireplace.
To reinstall the top louver, follow the above steps in the reverse sequence. The top louver support should be
inserted between the first and second fins of the top louver. Make sure to pull the louver against the back of the
facing and center it.
To remove the bottom louver:
1. Grab the louver with both hands.
2. Slowly lift the left end of the louver while pushing the top of the louver farther inside the fireplace casing.
3. Once the louver is against the top of the casing, move it back to disengage the left end of the louver from the
support.
4. Push the right end of the louver backwards and then slide the louver towards the left to disengage the right
end of the louver from its support.
5. Turn the louver on its side to bring it back out through the louver opening in the facing.
To reinstall the bottom louver, follow the above steps in the reverse sequence. The right end of the louver has a
cut-out where the right support should be inserted. The left support should be inserted between the first and
second fins of the bottom louver. Make sure to pull the louver against the back of the facing and center it.
INSTALLATION
Check with your local authority having jurisdiction (such as municipal building department, fire department, fire
prevention bureau, etc.) regarding restrictions and installation requirements, and the need to obtain a permit.
NOTE: We recommend that you remove the door until after all finishing work is completed around the fireplace.
This will reduce the possibility of scratches, vandalism, or damage to the finish caused by drywall dust, muriatic
acid, plaster, cement, paint or any other harmful spray or liquid.

FOCUS 320 Owner's Manual 11 RSF Woodburning Fireplaces
LOCATION
Your FOCUS 320 fireplace may be installed in many different ways (see Figure 3) without any special floor
reinforcement. We recommend that you take the time to plan your entire installation (fireplace, chimney, and
options) before beginning the actual installation (refer to Figure 4 and Figure 5).
Dimensions of the fireplace along with clearances are shown in Figure 1 and Table 1.
WARNING: IF THIS FIREPLACE IS NOT PROPERLY INSTALLED, A HOUSE FIRE CAN RESULT. FOR
YOUR SAFETY, FOLLOW THE INSTALLATION INSTRUCTIONS AND CLEARANCES. DO NOT PACK
REQUIRED AIR SPACES WITH INSULATION OR OTHER MATERIALS.
1. Note the location of roof and floor joists. Try to choose a location that does not require cutting them.
2. If at all possible, run the chimney up through the inside of the house. If it must be run outside, it should be
enclosed in an insulated enclosure (see "Installation: Chase Enclosure"). Remember, a cold chimney causes
poor draft.
The framing dimensions are larger than required for ease of installation. Examples shown here are for a
Louvered FOCUS 320. An extra 12" is required on the left of the fireplace of a Clean Face FOCUS 320 to
connect the intake air duct. The Heat Dump Option will also require an extra 12" on the selected side.
Additional space, dependant on your desired installation, is also required on top and maybe on one side of the
fireplace for the Central Heat Option
Figure 3 FOCUS 320 Framing Examples
44 1/4"
45" 24"
45"
90"
22" 64"

FOCUS 320 Owner's Manual 12 RSF Woodburning Fireplaces
Figure 4 Louvered FOCUS 320 General Installation
No combustible material over the
fireplace facing (grayed area,
refer to text for particulars)
Cold air trap (optional)
Rain Cap
Storm Collar
Flashing
Radiation Shield with a
Storm Collar in the Attic
Ceiling
Radiation Shield
Hearth Extension and
Beneath Hearth Extension
(refer to text for particulars)
Electrical Knock-outs
(on both sides of the fireplace)
Outside Air Inlet (refer to text for particulars)

FOCUS 320 Owner's Manual 13 RSF Woodburning Fireplaces
Figure 5 Clean Face FOCUS 320 General Installation
Gravity Vent Option FO-V2
(using flexible insulated
ducting provided by ICC
only): Two FO-V2's are
MANDATORY with Clean
Facing (shown here)
No combustible material over the
fireplace facing (grayed area,
refer to text for particulars)
Cold air trap (optional)
Obstruction plates part of
Clean Facing Option FO-F2
Rain Cap
Storm Collar
Flashing
Radiation Shield with a
Storm Collar in the Attic
Ceiling
Radiation Shield
Hearth Extension and
Beneath Hearth Extension
(refer to text for particulars)
Electrical Knock-outs
(on both sides of the fireplace)
Outside Air Inlet (refer to text for particulars)
Intake Grill part of Clean
Facing Option FO-F2

FOCUS 320 Owner's Manual 14 RSF Woodburning Fireplaces
MOBILE HOME INSTALLATION
The installation of your FOCUS 320 fireplace is the same whether you install it in a regular home or in a mobile
home. Nevertheless, you MUST comply with the following restrictions:
1. You MUST use a vented roof flashing.
2. You CANNOT install gravity vents.
3. You CANNOT install the central heating system.
4. You MUST use outside air as combustion air.
WARNING: IF YOU PLAN ON INSTALLING YOUR CHIMNEY WITH AN OFFSET THROUGH THE WALL OF
THE MOBILE HOME, VERIFY WITH THE AUTHORITIES HAVING JUSRISDICTION REGARDING THE
OBLIGATION OF ENCLOSING THE CHIMNEY ON THE OUTSIDE OF THE MOBILE HOME.
WARNING: DO NOT INSTALL IN SLEEPING ROOMS.
Make sure to provide access openings to the fireplace and chimney enclosures. These access openings must be
covered on a regular basis but must be easily opened to allow inspection of the installation and clearances after
any move of the mobile home.
Before using the fireplace, make sure that nothing is blocking the outside air inlet to freely allow outside air into
the fireplace. Review tips provided in the "Troubleshooting Problems" section on page 8 regarding potential
issues with household fans and depressurized homes.
Be aware that burning wood generates carbon monoxide; make sure it does not accumulate inside the mobile
home.
Be also aware that depending on your smoke detector location with respect to the fireplace, your smoke detector
may give you false alarms when the fireplace is being used.
Be careful, if you ever decide to renovate around the fireplace. Clearances around the fireplace and the chimney
MUST always be respected.
A radiation shield must be installed, as usual, at each floor where the chimney passes through. The ICC part is
long enough to extend to the outermost plane of the roof, which it must also protect.
CAUTION: THE STRUCTURAL INTEGRITY OF THE MANUFACTURED HOME FLOOR, WALLS AND
CEILING MUST BE MAINTANED.
CEILING CLEARANCE
Ceiling clearance is the distance from the base of the
fireplace to the ceiling. If you vent the fireplace enclosure,
you can then have a lower ceiling clearance as specified
in Table 1 (C) for a vented enclosure.
For a vented enclosure, you MUST install regular venting
3"x10" grilles or larger into holes cut within 1' of both the
floor and the ceiling, to allow room air to circulate through
the fireplace enclosure and reduce heat buildup. These
venting grilles may be placed vertically or horizontally.
Under no circumstances should the distance between the
ceiling firestop and the base fireplace be less than the
dimension specified in Table 1 (C).
STANDOFFS INSTALLATION
Before you begin installing you fireplace, you MUST
install the standoffs provided on both sides of the fireplace
and on the top. Please refer to Figure 6 to position them
adequately.
Once the standoffs are in place, make sure to seal the ¼"
gap between the fireplace and the standoffs with a high
temperature sealant. DO NOT fill the gap behind the sealant with insulation or any other material.
Figure 6 Standoffs Installation

FOCUS 320 Owner's Manual 15 RSF Woodburning Fireplaces
SECURING THE FIREPLACE IN PLACE
Once the fireplace is in its final location, take the time to attach it to the floor. Using at least two of the five small
brackets that were securing the fireplace to the crate, attach the casing of the fireplace to the floor. If possible, try
to have at least one, if not two, of the brackets screwed into the floor joists with 2" wood screws.
OUTSIDE AIR DUCT
After the fireplace is correctly positioned, connect the
outside air inlet to the fireplace.
Use an insulated aluminium flexible duct rated at over
200° F. The duct should not exceed 12' vertical rise
above the base of the unit. We suggest using the 4"
RSF outside air kit (FO-INT).
The air inlet should never be less than 5' below the
top of the chimney flue and must never terminate
in attic spaces.
A 4" diameter duct can be used if the total duct run is
less than 25'. For longer runs, use 5" diameter duct.
Both 4" and 5" connecting sleeves are provided with
the fireplace.
1. Find a convenient location for the insulated flexible
duct and outside air inlet. The outside air inlet can
be above or below floor level (see Figure 7).
2. Make a 4 ¼" (5 ¼" if using a 5" diameter duct)
hole in the outside wall of the house. Push the outside air inlet in from the outside. Seal the joint between the
air inlet and the outside wall with an appropriate sealant.
3. Place the insulated flexible duct over the round sleeve on the outside air inlet. At both ends, carefully pull
back the insulation and plastic cover, exposing the flexible duct. Then at each end, attach the duct with metal
screws to the air inlet and to the fireplace connecting sleeve. Carefully push the insulation and cover back
over the duct. Tape the plastic cover in place with 2" aluminium duct tape.
CAUTION: WHEN RUNNING THE DUCT AROUND CORNERS, BE SURE TO PREVENT CRIMPING THE
DUCT IN A WAY THAT WOULD RESTRICT THE COMBUSTION AIRFLOW.
CHIMNEY
This fireplace is certified for use with 7" ICC Model EXCEL chimney only. Please refer to Table 1 (D-E) for the
minimum and maximum chimney height permitted with the FOCUS 320 fireplace.
Table 3 Minimum Recommended Flue Heights In Feet From The Top Of The Fireplace
Elevation (ft) Number Of Elbows
0 2 x 15° 4 x 15° 2 x 30° 4 x 30° 2 x 45° 4 x 45°
0 - 1000 12’ 13’ 14’ 15’ 18’ 16’ 20’
1000 - 2000 12’6” 13’6” 14’6” 15’6” 19’ 16’6” 20’
2000 - 3000 13’ 14’ 15’ 16’ 19’6” 17’ 21’6”
3000 - 4000 13’6” 14’6” 15’6” 17’ 20’ 18’ 22’6”
4000 - 5000 14’ 15’ 16’ 17’6” 21’ 18’6” 23’
5000 - 6000 14’6” 15’6” 17’ 18’ 21’6” 19’ 24’
6000 - 7000 15’ 16’ 17’6” 18’6” 22’ 20’ 24’6”
7000 - 8000 15’6” 16’6” 18’ 19’ 23’ 20’6” 25’6”
8000 - 9000 16’ 17’ 18’6” 20’ 24’ 21’ 26’6”
9000 - 10000 16’6” 17’6” 19’ 20’6” 24’6” 22’ 27’
Figure 7 Outside Air Connection and Installation
Example
Above Floor
Example
Below Floor
Example
RSF
Fireplace
RSF
Fireplace
RSF
Fireplace
2" Aluminium
Duct Tape
Insulated Flexible Air Duct
Outside Wall
Outside Air
Inlet

FOCUS 320 Owner's Manual 16 RSF Woodburning Fireplaces
We recommend that the minimum height be increased by approximately 1' for every 2000' elevation above sea
level. Every 30° or 45° elbow also increases the minimum height by 1'. For example, if you are living 6000' above
sea level, your chimney should terminate at least 15' from the top of the fireplace (12' + 3' for the 6000'). See
Table 3 for more precise recommended flue heights.
CHIMNEY INSTALLATION
Make sure to read the EXCEL Chimney installation
manual concerning requirements for supports, bracing,
anchors, etc. The EXCEL Chimney manual is
available at your RSF dealer or on our web site:
www.icc-rsf.com. Refer to Table 1 (F) for the
maximum chimney height that can be supported by
the top of the fireplace.
WARNING: THE CLEARANCE BETWEEN THE
CHIMNEY AND COMBUSTIBLE MATERIAL MUST
BE 2" OR MORE. DO NOT FILL THIS AREA WITH
INSULATION.
1. Cut and frame the required holes in the floor(s),
ceiling(s) and roof where the chimney will pass
through. The rough opening in the framing is 13"
square (the opening can be slightly bigger, but
NEVER smaller).
2. From below, install a radiation shield in each floor
through which the chimney passes. At the attic
level, install a radiation shield and a storm collar
as shown in Figure 8.
WARNING: A RADIATION SHIELD MUST BE
INSTALLED AT EACH FLOOR WHERE THE CHIMNEY PASSES THROUGH.
3. Place the first length of chimney on the fireplace. Secure the chimney length to the fireplace with the three
screws provided. Assemble the rest of the chimney.
The chimney must extend at least 3' above its point of contact with the roof and at least 2' higher than any
wall, roof, or building within 10' of it. If the chimney is higher than 5' above the roof, it must be secured using a
roof brace.
4. Put the roof flashing into place. Seal the joint between the roof and the flashing with roofing tar or an exterior
sealant. For sloping roofs, place the flashing under the upper shingles and on top of the lower shingles.
Secure the flashing to the roof using roofing nails or roofing screws.
If the chimney is enclosed to the roof:
•In USA: use a vented flashing;
•In Canada: use a vented flashing, or a roof radiation shield with a regular flashing.
WARNING: DO NOT BLOCK ANY OF THE OPENINGS IN THE VENTED FLASHING WITH SEALANT,
CAULKING OR ANY OTHER MATERIALS.
5. Place the storm collar over the chimney and flashing. Place a bead of exterior sealant around the chimney
below the storm collar, pull the storm collar through the sealant and seal it once again on the top with the
exterior sealant (DO NOT use roofing tar).
6. Fit the rain cap on the chimney. Secure it tightly in place.
Figure 8 General Chimney Installation
RSF
Fireplace
Radiation
Shield
Rain Cap
Flashing with
Storm Collar
3' min.
10'
2' min.
Storm Collar
in the Attic
Ceiling
Clearance (see
Table 1 (C))
The chimney
must be enclosed
when it passes through
living spaces: min.
clearance of 2" with
chimney
2" min.
 NOTE: Openings
must be framed to
adequately support
any chimney
supports and roof
assemblies
 WARNING:
DO NOT PACK
REQUIRED AIR
SPACES WITH
INSULATION OR
OTHER
MATERIALS
 WARNING:
MAJOR RISK
OF FIRE,
LOOSE FILL
INSULATION
MUST NOT GO
ABOVE THE
RADIATION
SHIELD AND
MUST NEVER
COME IN
CONTACT
WITH THE
CHIMNEY

FOCUS 320 Owner's Manual 17 RSF Woodburning Fireplaces
OFFSET CHIMNEY
An elbow may be installed directly on top of the fireplace if required. See the detailed offset charts in the EXCEL
chimney installation manual. Use the offset option if you need to clear a joist or pass around a cupboard. See
Figure 9 and Figure 10 for examples.
•Maximum offset angle:
•In USA: 30° •In Canada: 45°
•Maximum number of elbows: four, resulting in two offsets and returns.
Install the fireplace and chimney as described earlier. When you require an elbow, proceed as follows:
1. Install the required elbow. Turn it in the desired direction, and fasten it to the chimney length with the three
metal screws provided at the joints.
2. Install enough lengths to obtain the desired offset. Secure each joint with three metal screws. Refer to the
offset charts provided with the EXCEL chimney installation manual for exact offset dimensions.
3. Use another elbow to return the chimney to the vertical direction.
4. Install a roof support, a wall support, or an offset support above each offset to support the weight of the
chimney (elbows are not designed to support the chimney above an offset).
Figure 9 Offset Chimney Installation Example Figure 10 Offset Chimney Through a Wall Example
Radiation
Shield
Use Offset
Support or
Roof Support
RSF
Fireplace
Radiation
Shield
3 Metal Screws
in Each Joint
Rise
Offset
10'
2' min.
Flashing*
with Storm
Collar
1' min.
Radiation
Shield and
Offset, Roof or
Wall Support
Insulated Wall
Radiation
Shield
(30° or 45°)
*In USA: use a
vented flashing
*In Canada: use
either a vented
flashing only or a
regular flashing
with a roof radiation
shield
RSF
Fireplace

FOCUS 320 Owner's Manual 18 RSF Woodburning Fireplaces
CHASE ENCLOSURE
If the chimney runs up the outside of the house, we
recommend that it be enclosed in a chase structure. The
chase should be constructed in such a way that it is an
extension of the home (see Figure 11). It should be well
insulated between the footings and the floor of the home to
prevent heat loss. If the climate in your area is mild,
insulate the chase at least to the first firestop. If the climate
in your area is very cold, insulate the chase to the top to
keep the chimney warmer, increase the draft, and reduce
creosote buildup. We also recommend to insulate the
ceiling of the chase just as if it were in the attic space. This
will prevent cold air from dropping down through the chase
and into the room where the fireplace is installed (see
Figure 11).
Some local codes require that the walls be insulated, vapor
sealed and sheathed with a fire rated gypsum board (see
Figure 11). We strongly recommend this procedure for all
installations to prevent cold drafts from originating in the
fireplace enclosure. If you follow this procedure, we
recommend that you do not insulate the wall above the
front of the fireplace.
REMEMBER: Check local codes concerning installation
requirements and restrictions in your area.
MASONRY CHIMNEY
Installing your FOCUS 320 fireplace with a masonry
chimney still requires using EXCEL chimney from the top of
the fireplace to where it will connect to a listed liner that will
run up inside the masonry chimney (see Figure 12).
The stainless steel liner should be fitted inside the clay liner all the way to the top of the masonry chimney. It is
not meant to replace the clay liner. You can use either the EXCEL liner or any other listed liner to ULC-S635,
ULC-S640 or UL-1777.
Special care is to be taken to make sure that you have a good solid connection between the EXCEL chimney and
the liner. A masonry adaptor (FO-FDM7) was designed specifically for that purpose and is available from your
RSF dealer. It will attach to the liner with 3 stainless steel rivets (provided) and to the EXCEL chimney with 3
screws (provided).
After mortaring in place, the
connection between the EXCEL
chimney and the liner should not
be visible in order to isolate the
heat released through the liner
from the fireplace enclosure.
As depicted in Figure 12, you
must install at least one 18" length
of EXCEL chimney after the
EXCEL chimney elbow. The
uppermost part of the EXCEL
chimney - where it enters the
masonry chimney - must be a
minimum of 12" from the ceiling.
Figure 11 Chimney Installed with a Chase
Enclosure Example
Figure 12 Connection to a Masonry Chimney
10'
2' min.
Optional
Decorative
Shroud
Insulation
Chase liner of fire rated
gypsum board is
recommended (may be
required by local authorities)
Radiation
Shield,
with Storm
Collar in
the Attic
RSF
Fireplace
Mortar
Mortar
Clearances as per
NBC or NFPA 211
EXCEL liner or other listed liner to
ULC-S635, ULC-S640 or UL-1777
12" min. to
combustible ceiling
EXCEL chimney
lenght: 18" min.
EXCEL chimney
elbow
Masonry Adaptor
FO-FDM7
Metal
Firestop
Liner
Elbow
RSF
Fireplace

FOCUS 320 Owner's Manual 19 RSF Woodburning Fireplaces
NOTE: If the ceiling is high enough, you can install one or more EXCEL chimney lengths directly on the
fireplace before the elbow.
If you use a flexible liner, make sure to be careful when cleaning to ensure that the stainless steel flexible liner is
not dislodged in any way.
Using an Existing Masonry Chimney
WARNING: IF YOU ARE CONSIDERING USING AN EXISTING CHIMNEY, IT MUST FIRST BE
THOROUGHLY INSPECTED BY AN AUTHORITY HAVING JURISDICTION TO DETERMINE THE
FOLLOWING:
1. The masonry chimney is well constructed and fully lined, in accordance with Local Building Codes and the
National Building Code of Canada (NBC) or National Fire Protection Association chimney standard (NFPA
211).
2. It has been thoroughly cleaned of any soot or creosote residue and inspected to determine that it is in good
working condition.
3. There is no insulation of any type in contact with the masonry chimney and there is no insulation stuffed
anywhere in the chimney.
4. All the necessary clearances around the masonry chimney, along the complete run of the chimney, are
respected as per NBC or NFPA 211. If the masonry chimney is enclosed in drywall, openings will probably be
required in order to verify clearances at all points.
5. The masonry chimney will only be used for the fireplace and no other appliance.
If major repairs are required to meet the above conditions, a new chimney should be constructed.
To make the hole through the masonry chimney and make the connection to the fireplace, we recommend that
you follow these steps:
1. Sight-in and mark the outline of where the EXCEL chimney will penetrate the masonry chimney.
2. Using a large (¾" - 2") masonry drill bit, drill a hole exactly in the center of the oval outline. With a masonry
hammer and drill, slowly enlarge the hole to the size required. Remember to work from the center out. Be
especially careful with the clay liner behind the brick because three sides of it must stay in place.
3. Bring the stainless steel liner down from the top of the chimney.
If you are using a rigid liner you will need enough room to secure an elbow to it with at least two screws.
If it is difficult to install rigid stainless steel liner in the existing masonry chimney or for a masonry chimney
with less than 10"x10" inside, a listed stainless steel flexible liner can be used along with a flexible/rigid
adaptor (LM-7LAF) available from your RSF dealer.
4. Install the liner elbow and masonry adaptor on the lower end of the liner.
5. Move the fireplace forward enough to install the EXCEL chimney on the fireplace (elbow and length) then
move the fireplace back into position as you connect the masonry adaptor to the EXCEL chimney.
Using a New Masonry chimney
Since the masonry chimney is not build yet, we recommend that you position your fireplace, install the EXCEL
chimney on it and connect to the first length of liner before building the chimney as explained above and shown in
Figure 12 . The liner sections can easily be installed as the layers of brick are being placed. Since this is a new
chimney, we recommend that you build it to the right size so you do not have to ovalize the liner.
Remember: The stainless steel liner should be fitted inside the clay liner all the way to the top of the masonry
chimney. It is not meant to replace the clay liner.

FOCUS 320 Owner's Manual 20 RSF Woodburning Fireplaces
FRAMING
The enclosure walls can be framed with any suitable
materials (2x4 or 2x6 studs, plywood, gypsum board,
etc.). Because of the high heat output potential of the
FOCUS 320, combustible materials must NOT go
closer to the fireplace than the standoffs, top, back
and sides.
You may also completely cover the top of an FOCUS
320 as long as you maintain all fireplace standoff
clearances and the 2" clearances around the chased
chimney. The 2" clearance around the chimney must
be open from the fireplace up to the ceiling. See
Figure 13 for an example of a close clearance
installation.
COVERING THE FIREPLACE FACING
Facing materials (see Figure 4 and Figure 5) MUST BE NON-COMBUSTIBLE such as metal, brick, slate or
ceramic tile. Gypsum board is NOT an acceptable facing material. Gypsum board cannot get closer to the
fireplace than the side and top standoffs.
Facing this fireplace can be as simple as using cement boards that will be painted or gluing ceramic tiles with high
temperature silicone sealant. The facing material can be installed directly against the lintels surrounding the door
and louvers.
MANDATORY OPTIONS WITH THE CLEAN FACE
When installing a Clean Face (FO-F2) on your FOCUS 320, you MUST install the intake duct (part of FO-F2) to
provide sufficient air to the unit along with two Gravity Vent Kits (FO-V2, sold separately) to provide an evacuation
path for the heat. Neglecting to install either one of these will result in overheating of the unit and may put your
safety at risk. Refer to each option's installation instructions for particular details.
Use only genuine RSF parts. The use of any substitutes will void the warranty and may put your safety at risk.
HEARTH EXTENSION
The area immediately in front of the fireplace must be protected by a non-combustible material such as brick, tile,
stone, or slate. Refer to Table 1 (G-H) for the depth and width that the hearth protection should extend beyond the
front and both sides of the door opening (see Figure 1). There is no minimum thickness required for the hearth
extension.
BENEATH HEARTH EXTENSION
If the FOCUS 320 is installed on a non-combustible
floor, the spark guard specified below is not required.
Install the spark guard provided (5" x 36" piece of
sheet metal) halfway under the fireplace and halfway
under the hearth extension and centered on the door
opening. The spark guard will extend 2½" beneath the
fireplace. This will make certain that sparks cannot
lodge in this area and start a fire. If necessary, the
provided spark guard can be cut to the minimum width
specified in Table 1 (I).
If you are preparing a raised installation, you will need a custom made spark guard, either a "Z" shaped spark
guard or a right angle spark guard (see Figure 14). The Z-shaped spark guard must be used if the height between
the bottom of the fireplace and the top of the non-combustible flooring of the hearth extension is less than or
equal to 2 ½". The height of the Z-shaped spark guard must equal the distance between the floor and the base of
the unit and go under the hearth extension and the fireplace by at least 2½". If the unit is installed higher than 2
½" from the top of the flooring, a right angle spark guard is necessary. The sides of the right angle spark guard
Figure 13 Close Clearance Installation of an FOCUS
320
Figure 14 Special Custom-made Spark Guard
Always maintain 2" min.
clearance with chimney
Always respect the
fireplace standoffs
Leave the space between
the chimney and the
framing open (no firestop)
RSF
Fireplace
Non-
Combustible
Flooring
Right Angle
Spark Guard
(not provided)
More than 2 1/2"
Non-
Combustible
Flooring
Z-Shaped Spark
Guard (not
provided)
2 1/2" or less