Security Fireplace BIS ULTRA EPA User manual

E P AE P A
Installation Instructions
This installation manual will help you obtain a
safe, efficient, dependable installation for your
fireplace and chimney system. Please read and
understand these installation instructions before
beginning your installation.
CAUTION: Do not attempt to modify or alter the
construction of the fireplace or its components.
Any modification or alteration of construction
may void the warranty, listings and approvals of
this system. In that case, Security Chimneys
International Ltd will not be responsible for
damages. Install the fireplace only as described
in these instructions.
PLEASE RETAIN THIS MANUAL
FOR FUTURE REFERENCE
WARNING: The fireplace cannot be operated
without doors. Consult your dealer to select the
correct door model.
Listed to standards ULC-S610
UL-127
SECURITY CHIMNEYS INTERNATIONAL LTD
2125 Monterey St., Laval, Quebec, Canada, H7L 3T6 Tel.: [phone]
Printed in Canada Rev. 04 Sept. 2002 PIBISULTRAEPA

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25 YEAR LIMITED WARRANTY
Security Chimneys International Ltd. warrants to the original consumer-purchaser that the woodburning fireplace
Model BIS ULTRA will be free from defects in material and workmanship, under normal use and service, for a
period of twenty-five (25) years from the date of purchase.
This warranty shall be void if the fireplace is not installed in accordance with the installation instruction manual
provided with the product and does not cover damage caused by misuse of the product. This 25 year warranty is
limited to residential use of the product only.
WARRANTY LIMITATIONS:
1. During the first year of the limited warranty, Security Chimneys International Ltd. will provide replacement
parts at no charge and will also pay for reasonable labor costs for repair work. All repairs must be approved
by an authorized company official before any work is done. Labor costs to be borne by Security Chimneys
International Ltd. must not exceed the retail price of the parts replaced.
2. During the second through the fifth years of the limited warranty, Security Chimneys International Ltd. will
provide replacement parts (if available) at no charge, except for the parts listed below. Security Chimneys
International Ltd. shall not be responsible for any labor costs.
The following parts are guaranteed for one (1) year: Blowers, ceramic glass.
The following parts are guaranteed for three (3) months: Wood grate, refractories, firescreen, gaskets.
3. During the sixth through the twenty-fifth years of the limited warranty, Security Chimneys International Ltd.
will provide replacement parts (if available) at 50% of the retail price, except the parts mentioned above.
Security Chimneys International Ltd shall not be responsible for any labor costs.
4. The following parts are not covered by the warranty: brass trims, panels, louvers.
This warranty may not be extended by our representatives in any manner whatsoever.
The warrantor makes no warranties express or implied, written or oral, other than those specifically stated in this
25 year limited warranty. The duration of any implied warranty including that of merchantability or fitness for
any particular purpose shall be limited to 25 years from the date of purchase.
The remedy for damages as the result of any defect in this product which have been warranted herein is limited to
replacement of defective parts and does not include any incidental or consequential damages or expenses
sustained in connection with the product, including damage to property.
Security Chimneys International Ltd. is not responsible for inadequate fireplace system draft caused by air
conditioning, heating, mechanical system or general construction conditions which may generate negative
pressure in the property.
The chimney is covered by a separate 30 year limited warranty.
FOR UNITED STATES ONLY :
Some states do not allow limitations on how long an implied warranty lasts, so the above limitations may not
apply to you.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you. This warranty gives you specific legal rights and you may also have
other rights which vary from state to state.
NOTE:Dated proof of purchase is required for recognition of this warranty.

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TABLE OF CONTENTS
Page
SAFETY RULES ............................................................................................................................................................................4
CERTIFICATION LABEL.........................................................................................................................................................5
THE FIREPLACE
INTRODUCTION................................................................................................................................................................6
Parts required....................................................................................................................................................................6
Additional equipment (optional)....................................................................................................................................6
OPERATING THE BIS ULTRA.....................................................................................................................................7
Fuel.....................................................................................................................................................................................7
First fires............................................................................................................................................................................7
Building a fire ...................................................................................................................................................................7
Combustion control.........................................................................................................................................................8
Accelerated combustion..................................................................................................................................................8
Medium combustion........................................................................................................................................................9
Slow combustion .............................................................................................................................................................9
Refueling for best performance.....................................................................................................................................9
Smoking – Causes and Troubleshooting....................................................................................................................10
MAINTAINING YOUR BIS ULTRA
Creosote...........................................................................................................................................................................11
Chimney maintenance...................................................................................................................................................11
Dealing with a chimney fire .........................................................................................................................................12
Finish door casing care .................................................................................................................................................12
Ashes................................................................................................................................................................................12
Refractory installation...................................................................................................................................................13
Doors installation...........................................................................................................................................................13
Doors adjustment...........................................................................................................................................................14
Glass care - replacement...............................................................................................................................................14
Glass care - cleaning......................................................................................................................................................14
Gasket replacement........................................................................................................................................................14
FIREPLACE INSTALLATION.....................................................................................................................................15
Locating the BIS ULTRA.............................................................................................................................................15
Hearth extension requirements ....................................................................................................................................15
Framing, facing and mantel..............................................................................................................................16-17-18
HOT AIR DUCTING INSTALLATION.....................................................................................................................19
Gravity kit............................................................................................................................................................19-20-21
Central forced air kit......................................................................................................................................................22
OUTSIDE AIR KIT...........................................................................................................................................................23
Outside air kit installation.............................................................................................................................................23
THE CHIMNEY
CHIMNEY INSTALLATION NOTES ........................................................................................................................24
CHIMNEY INSTALLATION INSTRUCTIONS .........................................................................................25-26-27
OFFSET CHIMNEY INSTALLATION..........................................................................................................28-29-30
ANGLED WALL RADIATION SHIELD...................................................................................................................31
CHIMNEY SUPPORTS INSTALLATION................................................................................................................32
MULTIPLE TERMINATIONS ...............................................................................................................................32-33
S2100+/HT6000+ CHIMNEY ADAPTOR..................................................................................................................33
MASONRY APPLICATION..........................................................................................................................................34
PARTS AND COMPONENTS .................................................................................................................................35-36
OPTIONS .......................................................................................................................................................................36-37
APPENDIX (Specifications, Clearances, Replacement parts)....................................................................................38

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SAFETY RULES FOR OPERATING
YOUR FIREPLACE MODEL BIS ULTRA
Warning:An outside air kit must be installed on the fireplace model BIS ULTRA
Warning:The fireplace must be operated with the doors fully opened or fully closed. If the doors are left partly
opened, smoke may be drawn into the room. If the unit is operated with the doors fully opened, the
optional firescreen must be used.
•Use only Security Fireplace glass doors, specifically designed for the model BIS ULTRA fireplace.
•When cleaning the fireplace, 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 outside the house, pending final
disposal. If the ashes are disposed of by burial in soil or otherwise locally dispersed, they should be retained in the
closed container until all cinders have thoroughly cooled.
Caution:Never use gasoline, kerosene, charcoal lighter fluid or similar liquids to start or rekindle a fire in
this fireplace. Keep all such liquids well away from the fireplace at all times.
Caution:Keep combustible materials at least 48 inches away from the front of the fireplace opening.
Caution:Never leave children unattended when there is a fire burning in the fireplace.
WARNING:THIS FIREPLACE HAS NOT BEEN TESTED WITH AN UNVENTED GAS LOG SET. TO
REDUCE RISK OF FIRE OR INJURY, DO NOT INSTALL AN UNVENTED GAS LOG SET
INTO THIS FIREPLACE.

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CERTIFICATION LABEL

6
THE FIREPLACE
INTRODUCTION
The BIS ULTRA fireplace is an energy efficient, heat circulating, close combustion fireplace. You will receive a
lifetime of comfort and enjoyment from your fireplace provided it is installed, maintained and operated properly.
•Please read these instructions and retain this manual for future reference.
•Before beginning the fireplace installation, consult the local authorities to obtain your building
permit and check your local building codes. Install the fireplace only as described in these
instructions and using only Security Chimneys International components.
•The BIS ULTRA is not intended for use with a gas log. Failure to follow these instructions will
void the certification and the warranty of the fireplace and may result in an unsafe installation.
Parts required
•Fireplace model BIS ULTRA
•Doors set
•6" diameter chimney model ASHT+, S-2100+, HT6000+ , HT6103+ or AC manufactured by Security Chimneys
International only, including:
- Chimney lengths
- Elbows (where necessary)
- Radiation shield, Attic radiation shield
- Roof flashing
- Rain cap
- Supports (if necessary)
•Outside air kit
Additional Equipment (optional)
•5" flexible venting system (central forced air kit)
•Gravity venting system
•Cast iron ornaments
•Panel for clean face option (only with gravity venting system)
•Rigid firescreen
•Fireplace fan kit

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OPERATING THE BIS ULTRA
Fuel
The BIS ULTRA is designed to work best when fueled with seasoned cordwood. Hardwoods are
preferred to softwoods since the energy content of wood is relative to its density. Hardwoods will
result in a longer burning fire and less frequent refueling. A moisture content of 15% to 20%
(seasoned) is recommended. Excessively wet wood will be difficult to burn and will result in lower
efficiency, increased creosoting and deposits on the glass and in the chimney. Excessively dry
wood will burn well but will also have higher emissions and shorter burning time.
Do not burn scrap or garbage, treated wood or wood such as driftwood from the ocean which has
been exposed to salt or other chemicals. Salt or chemicals can corrode the firebox and chimney. Do
not burn large amounts of paper, cardboard, Christmas tree branches or building construction
materials. Intense firing with these materials may overheat the fireplace, causing damage to the
unit, a fire or even possibly igniting a chimney fire if the chimney is creosoted.
First fires
Before using the fireplace make sure to remove the plastic wrapping on the doors. Remove all
remaining glue with mild soap.
The first 5 or 6 fires should be small fires of short duration (about 30 to 60 minutes). This will help
cure the refractory bricks. Ashes that will accumulate in the ashtray will protect it from intense
heat. The first fires may produce slight smoking due to drying of the paint and steel and any dust
accumulated on the fireplace will burn off at this time. It may set off a smoke alarm located in the
same room. For this reason the room should be well ventilated for the first few fires.
Building a fire
To start a fire, place several crumpled up balls of newspaper in the firebox. Place small dry pieces
of kindling on top of the paper, crisscrossing the kindling so that there are airspaces in between.
Keep the fuel far back enough so that air can get underneath. Open the air control fully and light
the newspaper. Once the newspaper is well ignited, close the doors. Once the kindling fire is well
established, cordwood can be added.
The unit will burn best with 2-3 pieces of cordwood spaced 1 to 2 inches apart and allowing air to
get under the fuel. Crisscrossing or arranging the fuel so that air can get underneath, will help the
fire to get started easily. The unit should be operated with the air control fully open long enough to
get the cordwood well ignited.

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Combustion control
There is no flue damper in the BIS ULTRA. As is common with air tight stoves, the combustion air
damper controls the air entering the firebox. This allows more precise control of the fire The
combustion air damper knob is located below the left door. It is opened when moved completely to
the left. This control should be in the closed position when the fireplace is not in use. This will
minimize air leakage up the chimney. The combustion air control should be opened before opening
the doors to minimize the possibility of back draft coming into the room.
Figure 1
Accelerated combustion
The maximum heat output for the BIS ULTRA is achieved
by burning with the doors closed and the combustion air
damper opened. By this method, the BIS ULTRA can
produce up to 60,000 BTU of heat per hour. However, it
will be necessary to reload with wood every one or two
hours. This is the least efficient method of burning the
BIS ULTRA.
Use caution when firing with the combustion air control wide open. Only burn cordwood in this
manner. Small dry pieces of softwood and construction scraps will burn very intensely using this
method and may damage the firebox.

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Medium combustion
This is the recommended mode of operating the BIS
ULTRA and should be the one normally used since it will
deposit the least amount of creosote on the glass and in the
chimney. The combustion air damper must be 3/4 closed.
The precise setting will depend on many factors, including
chimney length and the moisture content of the wood.
For instance, a long chimney will necessitate closing the damper more. To obtain the proper
combustion, close the damper completely, then open it about ½" to ¾". Three medium size pieces
of wood should be burning on a bed of hot coals. The heat output will be approximately 30,000
BTU per hour and the loading time will be about every 3-4 hours. Softwoods may be burned using
this method but the time will be substantially reduced.
Slow combustion
When the air combustion damper is closed, the fireplace is
in a slow combustion phase. Slow combustion will not
stop the fire, but there will be a noticeable change in the
flame pattern. The flames will be slow and may appear
dirty if the wood is too wet (moisture content of 20% and
more).
Creosote may accumulate on the glass doors. This method of burning should be used only after
operating the BIS ULTRA with the air control opened to produce a hot fire for about an hour. Slow
combustion can be used at night in order to reduce the heat output and to prolong the burn. The
loading time will be between 6-10 hours.
Refueling for best performance
The BIS fireplace will operate best if attention is given to operating the unit with the damper fully
opened after refueling in order to bring the firebox and the chimney system up to their optimum
operating temperature. Combustion efficiency is relative to firebox temperature. A temperature of
500º C and up in the upper part of the firebox indicates a maximum efficiency. To obtain this
temperature, the fireplace must be operated with the damper fully opened during 15 to 30 minutes
after reloading, depending on the heat and on the moisture content of the wood. Once you have
reached the desired temperature, the damper can be closed gradually.You know you have reached
the desired temperature when, closing the damper, you can see a flame at the top of the firebox.
The benefit of this technique will be cleaner glass, less creosoting, greater efficiency and the most
pleasing fire for your enjoyment. If your fireplace is equipped with a central forced air system,
make sure the central blower is turned off during reloading to avoid smoking problems.

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Smoking – Causes and Troubleshooting
To reduce the likelihood of smoking when opening the doors, set the damper to the "accelerated
combustion" position before opening the doors. Your fireplace has been designed and tested to
provide smoke free operation. Occasionally, there may be a small amount of smoking upon lighting
the fire, until the chimney heats up but this should not continue. If the fireplace continues to smoke
it is probably for one of the following reasons:
1. The doors are partly open
Open both doors fully when opening them.
2. Negative pressure in the house
As the fire burns, air goes up the chimney. This air must be replaced through leakage into the house
or through the outside air duct When operating the BIS ULTRA open a nearby window temporarily
to check the adequacy of the replacement air supply.
3. Fans operating (e.g.: range hood)
These fans draw air out of the house and may actually cause a negative pressure in the house. Turn off all fans and open
a nearby window to determine if this is the cause of the problem.
4. Wet wood
Wet or tarred wood will smolder and smoke instead of burn properly.
5. Dirty or blocked chimney
Check to make sure the chimney is clear and reasonably clean.
6. Chimney not long enough
The minimum chimney height is 12 ft. not including the fireplace height. The chimney must extend
at least 3 feet (915 mm) above its point of contact with the roof and at least 2 feet (610 mm) higher
than any roof or wall within 10 feet (3 m) of it. When installed with offsets, the minimum chimney
height is 15 ft. Additional height will increase draught and will decrease the tendency to smoke.
7. Poor chimney draught
With no fire, there should be sufficient draught to exhaust cigarette smoke introduced under the
baffle. Chimneys installed against an outside wall without protection may generate back draught
problems which will cause start-up problems. To prevent such situation, open a nearby window, roll
up a piece of paper and light it. Then, hold it in the upper part of the firebox to warm up the
chimney. Wait until the draught is sufficient , then start the fire.
8. Blower for central forced air kit operating
Make sure that the blower is at the "off" position when you open the fireplace doors for reloading.

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IMPORTANT NOTES
1. Do not block the hot air vents to the fireplace as this will cause the fireplace to overheat.
2. Never start a fire using gasoline, kerosene, charcoal lighter fluid or any other combustible liquid.
3. Do not burn coal. The sulphur in coal will corrode the firebox.
4. Do not burn driftwood which has been in the ocean or salt water. The salt will corrode the firebox and chimney.
5. Do not operate the unit with the doors partly open or with one door open, since this may cause smoke to be drawn
into the room.
6. Do not burn wood in the area in front of the grate.
7. Do not abuse the unit by burning paper, or cardboard or construction material such as pressed wood, plywood or
lumber.
8. Do not allow the wood to smoulder or burn without flame, since this will produce excessive creosote in the unit.
MAINTAINING YOUR BIS ULTRA
Creosote
When wood is burned slowly, it produces tar and other organic vapors which combine with expelled
moisture to form a black deposit called creosote which accumulates on the flue lining. When
ignited, this creosote makes an extremely hot fire. If the creosote accumulation is large, a creosote
fire in the chimney can damage the chimney and overheat the surrounding wood framing. Creosote
formation in a chimney can be minimized by making small hot fires rather than slow burning,
smoldering fires and by proper refueling techniques.
Chimney maintenance
Regular chimney inspection and maintenance combined with proper operation will prevent chimney
fires. Keep your chimney clean. Do not allow more than 1/16" creosote build up in your chimney.
The amount of creosote will depend on variables such as frequency of use and type of fire. We
recommend that you:
1. Initially inspect the chimney system weekly. From this, you will learn how often it will be necessary to clean your
chimney.
2. Have your chimney cleaned by a qualified chimney sweep. If you wish to clean it yourself, we recommend using a
stiff plastic or non-metallic brush. If a metal brush is used, its size should be slightly smaller than the flue to avoid
damaging the chimney. Do not use a brush that will scratch the stainless steel interior of the chimney.
3. Do not expect chemical cleaners to keep your chimney clean. The rain cap can be removed for inspection and/or
cleaning of the chimney. Using gloves, firmly grip the lower portion of the rain cap. Turn the cap 1/8 of a turn
counterclockwise and lift it off the chimney.
Dealing with a chimney fire
Regular chimney maintenance and inspection can prevent chimney fires. If you have a chimney fire, follow these steps:
1. Close the fireplace doors and the combustion air damper.
2. Alert your family of the possible danger.
3. If you require assistance, alert your fire department.
4. If possible, use a dry chemical fire extinguisher, baking soda or sand to control the fire. Do not use water as it may
cause a dangerous steam explosion.
5. Check outside to ensure that sparks and hot embers coming out of the chimney are not igniting the roof.

12
6. Do not use the fireplace again until your chimney and fireplace have been inspected by a qualified chimney sweep
or a Fire Department Inspector.
Finish door casing care
Use a glass cleaner and a soft cloth to polish the casing. Do not use abrasives such as steel wool or
steel pads for they may scratch the casing’s finish.
Ashes
Remove ashes only when the fire is out and the ashes are cold (24 to 48 hours after the fire is out)
Open the bottom louver and the doors, lift the door trap lever, remove the plug on the door trap of
the ashtray using gloves or a poker. Sweep the ashes in the opening with a brush or any similar
tool. Reinstall the plug on the door trap and pull down the lever.

13
Refractory replacement
The intense heat of the fire will normally cause hairline cracks in the refractory. These cracks can
be minimized by proper curing as described in "First fires". They will not normally diminish the
effectiveness of the refractory. If large cracks develop, then the refractory should be replaced. To
replace the refractory bricks, follow these steps:
1. Remove the bottom refractory
2. Remove the left side refractory
3. Remove the right side refractory
4. Remove the back refractory
5. Remove the front baffle refractory
6. Remove the rear baffle refractory
To install the new refractories, follow the above steps
in reverse.
Doors installation
The doors must be installed only when the
installation of the BIS ULTRA is completed.
All you have to do is fit the male part of the
hinge, already fixed on the doors, in the
female part, which is already fixed on the
fireplace.
To remove the doors, simply pull up the doors from the
hinges.
The doors adjustment has been set at the
factory. If the fit is still not perfect, you can
adjust the doors using the hinge screws (see
fig.4).
Figure 2
Figure 3

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Doors adjustment
The doors may need to be adjusted to be
completely airtight. The gaskets airtightness
can be adjusted using the adjustment screw
located on the fireplace façade at the bottom
of the fireplace opening. (An Allen key # 1/8
will be necessary for adjustment).
Glass care - Replacement
The glass used for the BIS ULTRA is a high
temperature glass (1400° F). If the glass
breaks, it must be replaced with a ceramic
glass. Tempered glass or ordinary glass will
not withstand the high temperatures of the
BIS ULTRA. Replacement glass should be
purchased from a Security Chimneys
International dealer. Do not operate the unit
with cracked or broken glass. Figure 4
Glass care - Cleaning
The BIS ULTRA is designed to keep the glass clean under normal operating conditions. If the BIS
ULTRA is operated continuously with the combustion air damper closed, the glass will tend to get
dirty unless the fuel, firebox and glass are maintained at hot temperatures (see "Refueling for best
performance) To clean the glass, there are a number of specially designed cleaners. Your
authorized Security dealer can recommend a suitable cleaner which is available in your area.
Regular household glass cleaners will not clean creosote. Do not use abrasives such as steel pads,
steel wool or oven cleaner as they will scratch the glass.
Gasket replacement
Remove the doors from the unit (see page 13) and lay them on a clean unabrasive surface. To
replace the gasket, first remove all of the old gasket and gasket cement. Make sure that the surface
is totally clean before applying new cement or adhesion problems may result. Apply gasket cement
to the gasket channel and install the new gasket. This replacement part is available from your
Security dealer in the following dimensions:
Gasket Length Quantity Dimensions
Around glass 47.5" 25/16" dia.
Between doors 19" 15/16" dia.
On door frame 40" 25/8" dia.
Around ash trap 8" 12" wide x 1/4" thick

15
FIREPLACE INSTALLATION
Locating the BIS ULTRA
1. The best location for your fireplace is determined by considering the location of windows,
doors, and the traffic flow in the room where the fireplace is located, allowing space in front of the
unit for the hearth extension and the mantel, and taking into consideration the location of the hot air
ducts (optional), outside air kit and chimney. If possible, you should choose a location where the
chimney will pass through the house without cutting floor or roof joists (see fireplace dimensions
page 16).
2. Usually, no additional floor support is needed for the fireplace. The adequacy of the floor
can be checked by first estimating the weight of the fireplace system. Weights are given in the
appendix. Next, measure the area occupied by the fireplace which is normally 38" X 24 ½". Note
the floor construction and consult your local building code to determine if additional support is
needed.
3. The BIS ULTRA may be installed directly on the floor or on a raised base (for proper
guidelines, refer to "Hearthextension requirements") and a minimum of 6'8" measured from the
base of the appliance to the ceiling is required.
Hearth extension requirements
The BIS ULTRA may be installed directly on a combustible floor, however the hearth extension in
front of the fireplace must be made of non combustible material and incorporate ½" air space to the
wood floor (fig.5). To maintain that ½" air space, you must use non-combustible material to frame
the hearth extension support and create the air gap or use a sheet metal part (7B30ZM)
manufactured by Security Chimneys International. It must be covered with tile, marble, stone or
other non-combustible material.
If the fireplace is raised a minimum of 4" from the floor, then the air space is not necessary but a
piece of sheet metal must be fabricated to join the bottom of the fireplace to the hearth extension
(fig. 6).
Figure 5 Figure 6

16
Framing, facing and mantel
The construction of the framing, facing, and mantel must be in accordance with the standards and
the following illustrations (figures 7 to 11):
1. Frame the fireplace using 2" x 3" or heavier lumber.
2. WARNING: Combustible material cannot be used in the space directly above the fireplace. This area must remain
empty for a height of 6'8" (2032 mm) measured from the base of the appliance.
3. Frame the fireplace with vertical studs at the sides of the fireplace running from floor to ceiling (see figure 8). If
combustible facing is to be used, position the studs back, from the front edge of the fireplace, a space the thickness
of the facing material so that the facing can be installed flush with the fireplace facing. Frame headers between the
vertical studs only as follows:
- Place 2" x 3" or 2" x 4" headers, only along the upper part of the front, side and back
faces. Do not put wood or any combustible material within the area above the fireplace
except on the front facing.
-Place headers only as required to support the facing and mantel.
Figure 7 Figure 9
Figure 8 Figure 10

17
INSULATED CHASE CONSTRUCTION
Figure 11

18
Facing
1. Combustible material must be installed flush with the fireplace. It may not project in front of
and on the fireplace (i.e. the steel façade of the fireplace) (figure 12).
2. Non-combustible materials such as brick, stone or ceramic tile may project in front of and
onto the fireplace facing (figure 13).
Mantel
The mantel must be installed at least 48" (1016 mm) above the base of the fireplace (figure
12).
Figure 12
Figure 13

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HOT AIR DUCTING INSTALLATION
Different hot air ducting systems can be installed with the BIS ULTRA : - Gravity kit
- Forced air kit
- As is - Heat circulating
Gravity kit
Two kits are available :
1. Double hot air outlet including: (See Fig.15)
- 2 telescopic lengths 8" I.D.
- 2 90º elbows 8" I.D.
- 2 hot air outlet kits (louvers and frames)
- 2 adaptors
2. Single hot air outlet including: (see Fig.14)
- 2 6" lengths 8" I.D.
- 1 hot air outlet kit (box, louver and frame)
- 2 adaptors
See components list page 35.
The only fan that can be used with the gravity kit is the UZY3.
The gravity kit allows you to block the upper grill of the fireplace. To do so, follow the steps below:
a) Remove the upper grill and its frame from the fireplace.
b) Install the black panel (BISCF) making sure that the insulation strip is installed inside.
c) The fireplace façade can be covered with non-combustible material (fig. 18).
figure 14 figure 15
The safety rules for hot air ducting gravity kit installation are the following:
Minimum height*68" (1727 mm)
Maximum length See figures 16 & 17
*The height of the louver must be measured from the base of the BIS to the middle point of the
louver.

20
The single outlet system is designed to be installed either flush with the front of the BIS ULTRA or
extended out slightly from the face of the fireplace (if installing with a brick or thick facing for
example). To extend the double outlet system, it will be necessary to purchase two adjustable
lengths (7B26ZL2A). To extend the single outlet, it is necessary to install the insulation strip
provided with the system. A maximum of 3 ½ ".(89 mm) of extension is provided by the single
outlet system (see figure 17).
When installing the double outlet system, the hot air outlets can be installed in the same room as the
fireplace, or one or both of the outlets can be installed in adjacent or upper rooms. Installing the
ducts at different elevations will tend to exhaust more heat out of the higher outlet (figure 16).
Figure 16 Figure 17
Figure 18