Enviro 1200-C Insert User manual

OWNERS MANUAL
SHERWOOD INDUSTRIES IS AN ENVIRONMENTALLY RESPONSIBLE COMPANY. THIS MANUAL IS PRINTED ON RECYCLED PAPER.
PLEASE SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE
Boston
Models: 1200-C & 1700-C Insert
PLEASE READ THIS ENTIRE MANUAL BEFORE INSTALLATION AND USE OF THIS WOOD
BURNING ROOM HEATER. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT
IN PROPERTY DAMAGE, BODILY INJURY OR EVEN DEATH.
Contact your local building or re ofcials,
or the authority having jurisdiction about
restrictions and installation inspection
requirements in your area.
This heater meets the U. S. Environmental Protection Agencies emission limits
for wood heaters sold after July 1st, 1990. Under specic conditions this heater
has been shown to deliver heat at rates ranging from 11,479 to 34,196 BTU per
hour for the 1200 and from 9,425 to 31,780 BTU per hour for the 1700.
50-2362
INSTALLER:
Leave this manual with the wood stove.
CONSUMER:
Retain this manual for future reference.
Tested &
Listed By
Portland
Oregon USA
OMNI-Test Laboratories, Inc,
C
O-
T L
US
Report # 268-S-06b-2

Table of Contents
2
Safety Precautions..........................................................................................3
Operating Instructions.....................................................................................4
Building Your Fire.................................................................................5
How It Works......................................................................................9
Specications................................................................................................10
Air Control.........................................................................................10
Specications.....................................................................................10
Clearances To Combustibles - 1200-C Insert.........................................11
Clearances To Combustibles - 1700-C Insert.........................................12
Dimensions - 1200-C Insert.................................................................13
Dimensions - 1700-C Insert.................................................................14
Installation...................................................................................................15
Removal From Pallet..........................................................................15
Modications For Installation with 191/16” (484mm) High Lintel...........15
Masonry Fireplace Installation.............................................................16
Installation Using A Block-Off Plate For USA Only..................................19
Model 1200-C Brick Placement & Tube Locations.................................21
Model 1700-C Brick Placement & Tube Locations..................................22
C-Cast Ceramic Bafe Installation........................................................23
Fan Wiring Diagrams..........................................................................24
Removal of Cast Top............................................................................25
Removal of Cast Door..........................................................................25
Removal of Cast Side Panels.................................................................26
Removal of Cast Side Brackets.............................................................26
Removal of Surround Panel..................................................................27
Removal of Lower Front Casting............................................................28
Removal of Lower Cast Sides................................................................28
Removal of Fan Assembly....................................................................29
Door Latch Adjustment.......................................................................29
Rating Label..................................................................................................30
Parts List......................................................................................................31
Parts Diagram...............................................................................................32
Warranty......................................................................................................33
Installation Data Sheet...................................................... ............................36
Disassembly..................................................................................................25

3
Safety Precautions
FOR SAFE INSTALLATION AND OPERATION OF YOUR “ENVIRO” WOOD
STOVE, PLEASE CAREFULLY READ THE FOLLOWING INFORMATION:
● Please read this entire manual before you install and use your new woodstove. Failure to
follow instructions may result in property damage, bodily injury or even death. Be aware
that local Codes and Regulations may override some items in this manual. Check with your
local inspector.
● If this appliance is not properly installed, operated and maintained, a serious house re could result.
Makeshift compromises during installation could also result in a serious house re.
● HOT WHILE IN OPERATION. KEEP CHILDREN, CLOTHING, AND FURNITURE AWAY. CONTACT MAY
CAUSE SKIN BURNS.
● Operate only with the door tightly closed and burn wood directly on the stove hearth. Do not operate
if the door glass is broken or a gasket is missing or damaged. Do not alter the combustion air control
valves. Dangerous overring could occur which could ignite creosote in the chimney or cause a house
re.
● At least 12 square inches (77.4 cm2) of fresh outside air should be admitted into the room
● Do not burn coal or charcoal as there is danger of carbon monoxide being produced. DO NOT USE
CHEMICAL FLUIDS TO START OR RE-FRESH THE FIRE. DO NOT BURN GARBAGE OR FLAMMABLE
FLUIDS SUCH AS GASOLINE, GREASE, NAPHTHA OR ENGINE OIL. Never let the stove become hot
enough to get any part red or glowing red.
● Burning wet, unseasoned wood could cause excessive creosote accumulation in the ue pipe. When
ignited, it could cause a chimney re that could result in a serious house re.
● Do not use grates, irons or any other methods to support or raise the re up off the hearth of the
appliance.
● This appliance is tested to ULC-S627 Standard for Space Heaters for Use with Solid Fuel, ULC-S628
Standard for Fireplace Inserts, & UL 1482 Standard for Safety for Solid-Fuel Type Room Heaters.
● Both the 1200-C & 1700-C Fireplace Inserts are approved for installed into a zero-clearance replaces
in the U.S. In Canada refer to local building or re ofcials for restrictions and installation inspection
● In Canada the existing chimney must be lined to the termination for all masonry installs.
● A chimney connector shall not pass through an attic or roof space, closet or similar concealed space,
or a oor, or ceiling.
● Where passage through a wall, or partition of combustible construction is desired, the installation shall
conform to CAN/CSA-B365.
● DO NOT CONNECT TO ANY AIR DISTRIBUTION DUCT OR SYSTEM.
● In the event of component failure, only manufacturer specied replacement parts may be used.
● DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING ANOTHER APPLIANCE.
● DO NOT INSTALL IN A MOBILE HOME.

Operating Instructions
FIRST START
When rst installed, the chimney, rebricks and steel are cold and it usually takes several hours on a fairly
high burn for them to become hot and dry enough for the stove to function well. We recommend during
the unit’s rst burn that a door and window are opened to vent the smoke and fumes created from the
unit’s paint curing. The paint will smell a little for the rst burn or two as it cures.
DISPOSAL OF ASHES:
If you let the ashes accumulate two or three inches on the oor they tend to burn themselves up.
Ashes should be placed in a metal container with a tight tting lid. The closed container of ashes should
be placed on a noncombustible oor or on the ground, well away from all combustible materials, pending
nal disposal. If the ashes are disposed of by burial in soil or otherwise locally disposed, they should be
retained in the closed container until all cinders have thoroughly cooled. Other waste shall not be placed
in this container.
FAN OPERATION:
All models have been approved for operation with the fans supplied by the manufacturer. On medium or
high burns, using a fan will increase the heat transfer slightly. Route the electrical cord along the oor in
front of the surround panel. There are cutouts in the castings to tuck the cord under.
1. Plug the fan assembly into a standard three (3) prong grounded electrical receptacle.
2. The fan is controlled by a rotary dial located at the lower left side of the unit. The dial rotation is as
follows: OFF>HIGH>LOW
3. If the dial is in any position in the high to low range, the fan will automatically turn on once the
stove has reached operating temperature (roughly 25 mins from a cold start). When the unit cools
down, the fan temperature sensor will shut the fan off automatically. The fan can also be turned off
manually at any time by rotating the dial to the off position.
REPLACING THE GLASS:
Never strike or slam the door, hit the glass or let burning wood rest against it. If the glass cracks when
the re is burning, do not open the door until the re is out and do not operate the stove again until
the glass has been replaced. If the glass is damaged in any way, a factory replacement is required (see
“Parts List”). To replace the glass, remove the steel retaining clips and all loose glass. Replace only with
Neoceram 5 mm glass 16.61” (422 mm) x 10.63” (270 mm) and wrap the edges with 0.125” (3.2 mm) x
0.5” (13 mm) self-adhesive berglass gasket.
Wear gloves when handling damaged glass door assembly to prevent personal injury. When the glass
door assembly is being transported, it must be wrapped in newsprint and tape and/or a strong plastic bag.
The glass must be purchased from an ENVIRO dealer. No substitute materials are allowed.
FIRE EXTINGUISHER AND SMOKE DETECTION:
All homes with a solid fuel burning stove should have at least one re extinguisher in a central location
known to all in the household and a smoke detection device in the room containing the stove. If it sounds
the alarm, correct the cause but do not deactivate. You may choose to relocate the smoke detection
device within the room; DO NOT REMOVE THE SMOKE DETECTOR FROM THE ROOM.
4

CREOSOTE - ITS FORMATION AND NEED FOR REMOVAL:
When wood is burned slowly, it may produce tar and other organic vapors, which combine with expelled
moisture to form creosote. The creosote vapors condense in the relatively cool chimney of a slow-burning
re. As a result, creosote residue accumulates on the ue lining. When ignited this creosote makes an
extremely hot re. The chimney connector and chimney should be inspected bi-weekly during the heating
season to determine if a creosote buildup has occurred. If creosote has accumulated (3mm or more) it
should be removed to reduce the risk of a chimney re.
MAINTENANCE:
At the end of each heating season clean the chimney and the smoke pipe. If soot has accumulated above
the top bafe bricks, remove, clean, and then replace them. If a secondary air tube is badly corroded,
replace it. Replace worn door gaskets and broken bricks as needed.
FAILURE TO INSPECT AND CLEAN YOUR CHIMNEY SYSTEM REGULARLY CAN RESULT IN A
CHIMNEY FIRE, WHICH COULD DAMAGE THE CHIMNEY OR CAUSE A HOUSE FIRE.
CHIMNEY OR RUN AWAY FIRE:
1. Call local re department (or dial 911)
2. Close the draft fully
3. Examine the ue pipes, chimney, attic, and roof of the house, to see if any part has become hot
enough to catch re. If necessary, spray with re extinguisher or water from the garden hose.
4. Do not operate the stove again until you are certain the chimney and its lining have not been
damaged.
Building Your Fire:
Proper operation of your stove will help to ensure safe, efcient heating. Please take a few moments to
review these simple operating procedures.
IMPORTANT: Please be aware when loading your stove that the air tubes in the rear are lower.
1. Fuel Selection:
This stove is designed to burn natural wood only. Higher efciencies and lower emissions generally result
when burning air-dried seasoned hardwoods, as compared to softwoods or too green or freshly cut
hardwoods. DO NOT BURN the following: treated wood, coal, garbage, solvents, colored papers or trash.
Burning these may result in the release of toxic fumes and may poison or render the secondary air tubes
ineffective. Burning coal, cardboard or loose paper can produce soot, or large akes of char or y ash that
can coat the combustor, causing smoke spillage into the room, and rendering the combustor ineffective.
2. Building/Maintaining a Fire:
a) Open the primary air slide by pulling it all the way to the right.
b) Place a base of crumpled uncolored newspaper in the bottom of the stove. Lay pieces of kindling on
top of the newspaper and light it.
CAUTION: “Never use gasoline, gasoline-type lantern fuel, kerosene, charcoal lighter uid,
or similar liquids to start or “freshen up” a re in this heater. Keep all such liquids well
away from heater while it is in use.
c) As the kindling begins to burn, add several larger pieces of wood until the re is burning well. At this
point, regular size logs may be added.
Operating Instructions
5

6
Operating Instructions
NOTE: Until the re is burning well, leave the air controls fully open.
d) Regulate the heat output of the stove by adjusting the air controls to allow a larger re and vice versa.
A short period of experimentation with the control settings will allow you to regulate the heat output
to keep your home comfortable.
Do not use a grate or elevate the re. Build wood re on the stove rebox hearth oor.
3. Refueling the Stove:
Use a long pair of gloves (barbecue gloves) when feeding the re because these stoves burn at the front.
They are clean and efcient but they are also very hot and gloves are useful. Keep a small steel shovel
and whisk nearby for moving a log or lifting a fallen ember and for keeping the hearth clean.
a) Before attempting to add fuel to the stove, OPEN the damper control fully by pulling it all the way out.
This allows the chimney to carry away the additional smoke, which occurs when the door is open.
b) DO NOT OVERLOAD THE STOVE. Normally, three or four logs will provide heat for several hours.
Never operate this stove where portions glow red hot.
c) DO NOT OVERFIRE. If the heater or chimney connector glows, you are overring. Overring could
ignite creosote in the chimney and cause a house re.
d) CAUTION: DO NOT PLACE FUEL OR COMBUSTIBLE MATERIAL WITHIN SPACE HEATER INSTALLATION
CLEARANCES OR WITHIN THE SPACE REQUIRED FOR CHARGING AND ASH REMOVAL. LOGS SHOULD BE
KEPT IN A BIN OR CONTAINER TO REDUCE THE RISK OF LOGS ROLLING INTO THE UNIT’S CLEARANCES.
e) KEEP THE ASH LIP CLEAR OF EMBERS AND ASH. If the door is closed with debris in the way,
the door gasket seal could be compromised.
4. For Maximum Efciency:
When the stove is hot, load it fully to the top of the door opening and burn at medium low settings. When
the fuel is mostly consumed, leaving a bed of red coals, repeat the process. Maximum heat for minimum
fuel occurs when the stove top temperature is between 250°F (120°C) and 550°F (290°C). The most
likely causes of dirty glass are: not enough fuel to get the stove thoroughly hot, burning green or wet
wood, closing the draft until there is insufcient air for complete combustion, or a weak chimney draw.
Indeed, the cleanness of the glass is a good indicator of the stove operating efciently.
Helpful Hints Worth Repeating
1. Helpful advice on the correct way to start your re.
a) You will need small pieces of dry wood, called kindling, and paper. Use only newspaper or paper
that has not been coated or had other materials glued or applied to it. Never use coated (typically
advertising yers) or coloured paper.
b) Always open the door of the wood stove slowly to prevent suction and drawing smoke into the
room.
c) Crumple several pieces of paper and place them in the center of the rebox and directly onto the
rebricks of the wood stove. Never use a grate to elevate the re.
d) Place small pieces of dry wood (kindling) over the paper in a “teepee” manner. This allows for good
air circulation, which is critical for good combustion.
e) Light the crumpled paper in 2 or 3 locations. Note: It is important to heat the air in the stovepipe for
draft to start.
f) Fully open the air controls of the wood stove and close the door until it is slightly open, allowing for
much needed air to be introduced into the rebox. Never leave the door fully open, as sparks from
the kindling may y out of the stove, causing damage or injury. As the re begins to burn the kindling,

7
Operating Instructions
some additional kindling may be needed to sustain the re. DO NOT add more paper after the re has
started.
g) Once the kindling has started to burn, add some smaller pieces of seasoned, dry rewood. Note:
Adding large pieces at the early stages will only serve to smother the re. Continue adding small pieces
of seasoned dry rewood, keeping the door slightly open until each piece starts to ignite. Remember
to always open the door slowly between placing wood into the re.
h) Once the wood has started to ignite and the smoke has reduced, close the wood stove door fully. The
reduction of smoke is a good indication that the draft in the chimney has started and good combustion
is now possible. Larger pieces of seasoned, dry rewood can now be added when there is sufcient
space in the rebox. Adjust the air control setting to desired setting. Note: The lower the air control
setting, the longer the burn time of your rewood.
2. What type of wood is best to use as rewood?
Both hardwood and softwood burn well in this stove. Both woods contain about 8,000 BTU/lb (18,570
KJ/Kg), but hardwood is generally more dense, will weigh more per cord, and burns a little slower and
longer. Cutting rewood so that it will t horizontally, front to back, makes it easier loading and less likely
for the fuel to roll on the glass. Except for a cold start, there is no need to crisis-cross the logs. Ideal
length for the logs used in the 1200-C would be about 16“ (381 mm) but it can burn pieces up to 18”
long. Ideal length for the logs used in the 1700-C would be about 18“ (381 mm) but it can burn pieces
up to 20” long logs. Burn only dry, seasoned wood. It produces more heat and less soot or creosote.
Freshly cut wood has about 50% moisture. A 10 pound (4.5 Kg) log contains 5 pounds (2.3 Kg) of water.
To season rewood, split and stack it so that air can get to all parts of the wood. Burn beach wood only
if its salt content has been washed away in a season of rain and then the wood dried. To prevent smoke
spillage when refueling, open the door slowly.
3. What does dry, seasoned wood mean?
Wood that has been dried for a period of one year in a well-ventilated and sheltered area would be
considered dry, seasoned wood. Wood from slow-growing trees is generally considered better than wood
from fast-growing trees. To season rewood, split and stack it so that air can get to all parts of the
wood.
4. Will following the above-listed steps for starting a re mean perfect results every time?
The quick answer is ‘most of the time’. There are many variables that may affect your success when
starting a re. Most of those variables and how to deal with them will be learned through experience.
Your ability to start a good re will signicantly increase with time and patience. Some of the reasons for
poor stove performance will be covered in the next section of these instructions.
5. Why can’t I get the re lit?
Damp or wet wood and poor drafts are the main reasons for poor results in starting a re. Always use
dry, seasoned wood for your re. Even wood dried for two years will be difcult to ignite if it has become
wet.
6. Is it normal for soot to cover the glass at the beginning of a re?
Your stove has been built with an air-wash system that will help keep the glass clear when the rebox
has reached a good operating temperature and has a good draft. Normally, a hot stove will keep the glass

8
Operating Instructions
clean, but if you must clean the glass, use a soft cloth with no abrasive and clean only when the unit is
cold. Cold rebox temperature and poor draft cause sooting of the glass. Once the rebox temperature
and the draft increase, the soot will burn off.
7. What is draft?
Draft is the ability of the chimney to exhaust or draw smoke produced during the normal combustion
process. Too much draft may cause excessive temperatures in the appliance and may damage the
appliance. Inadequate draft may cause backpufng or “plugging” of the chimney. There is a certain
amount of draft that is required to allow for your stove to function at its’ highest efciency. A water
column gauge can be used to reference this amount.
8. What can cause a poor draft?
The most common factors for poor draft are:
a) Air supply
b) Environmental conditions
c) Cold chimney temperature
d) Poor chimney installation and maintenance
e) Atmospheric pressure
a) Air supply – Inside the home, normal household appliances such as clothes dryers and forced-air
furnaces compete for air, resulting in air starvation to the re. This creates a condition in the house
known as negative pressure. When a house experiences negative pressure, the combustion gases
can be drawn from the chimney and into the house. This condition is commonly referred to as down-
drafting. Increased amounts of insulation, vinyl windows, extra caulking in various places and door
seals can all keep heat in but may also make a home too airtight. An easy way to stop negative
pressure in a home is to crack a window in the room containing the stove.
b) Environmental Conditions - High trees, low-lying house location such as in a valley, tall buildings or
structures surrounding your house and windy conditions can cause poor draft or down-drafting.
c) Cold Chimney Temperature - Avoid cold chimney temperatures by burning a hot re for the rst fteen
to forty minutes, being careful not to over-re the stove. If any part of the chimney or parts of the
stove start to glow, you are over-ring the stove. Where possible, install a temperature gauge on the
chimney so temperature drops can be seen.
d) Chimney Installation and Maintenance - Avoid using too many elbows or long horizontal runs. Too short
a chimney can cause difcult start-up, dirty glass, back smoking when door is open, and even reduced
heat output. Too tall a chimney may prompt excessive draft, which can result in very short burn times
and excessive heat output. If in doubt, contact a chimney expert and/or chimney manufacturer for
help. Clean chimney, rain caps and especially the spark arrestor regularly, to prevent creosote build-
up, which will signicantly reduce chimney draw and possibly a chimney re.
Note: These instructions are intended as an aid and do not supercede any local, provincial or state
requirements. Check with ofcials or authorities having jurisdiction in your area.

9
Operating Instructions
How it works:
Figure 1: 1200-C Air Flow Path.
Figure 2: 1700-C Air Flow Path.
Hole Size
ALL DIMENSIONS IN INCHES
TOLERANCE
General An
g
les
Hole Pos.
UNLESS OTHERWISE SPECIFIED
MATERIAL
Sherwood Industries Ltd.
Part Description
Exhaust Smoke
1/2" Ceramic baffle;
reflects heat down
to burn the particles
in the smoke.
Secondary air tubes;
creates a second burn
on the particles in the
smoke for a more efficient
& cleaner burn.
Convection Heat
Radiant Heat
Primary air; window
air wash (cooler air to
keep the glass clean).
Pilot air through
Twin pilot injection ports.
Slider plate; used
for air flow control.
Intake air.
Hole Size
ALL DIMENSIONS IN INCHES
TOLERANCE
General An
g
les
Hole Pos.
UNLESS OTHERWISE SPECIFIED
MATERIAL
Sherwood Industries Ltd.
Part Description
Exhaust Smoke
1/2" Ceramic baffle;
reflects heat down
to burn the particles
in the smoke.
Secondary air tubes;
creates a second burn
on the particles in the
smoke for a more efficient
& cleaner burn.
Convection Heat
Radiant Heat
Primary air; window
air wash (cooler air to
keep the glass clean).
Pilot air through
Twin pilot
injection ports.
Slider plate; used
for air flow control. Intake air.
Seasoned Firewood

speciFications:
Table 1: 1200-C & 1700-C General Information.
Model 1200 Insert 1700 Insert
Width x Depth 27¾” x 22”
(705 mm x 559 mm)
27¾” x 26.5”
(705 mm x 673 mm)
Height of body 191/16” (484 mm) or 199/16” (497 mm)
Fire box size
(depth x width x height)
16.1” x 18.25” x 11.15”
(409 mm x 464 mm x 283 mm)
20.65” x 18.25” x 11.95”
(525 mm x 464 mm x 304 mm)
Capacity 1.85 feet3
(0.0526 meter3)2.5 feet3 (0.0708 meter3)
* Approximate heating area 800 - 1,500 feet2
(74.3 - 139.4 meter2)
1,000 - 2,200 feet2
(92.9 - 205.4 meter2)
**E.P.A. output rating 11,479 to 34,196 BTU/hour
(3,361 to 10,013 watt)
9,425 to 31,780 BTU/hour
(2,760 to 9,306 watt)
*Duration on low burn 6 -10 hours 8 - 12 hours
Weight with packaging 335 lb (151.95 Kg) 390 lb (176.90 Kg)
E.P.A. Emissions 3.3 grams/hour
(0.116 oz/hour)
4.48 grams/hour
(0.158 oz/hour)
Surround Panel
Standard (width x height) 49.25” x 31.25” (1251 mm x 794 mm)
Rating Label Location Side of Unit; Behind Right Shroud
10
Specifications
air control:
The primary air is controlled by the rod located on the right side of the unit. To increase your air, pull the
rod out and to decrease, push the rod in. All the units have a secondary air that ows through the tubes
at the top of the rebox, just below the bafes.
Pull this control all the way out when rst starting the
stove. Once the re has been established you may
adjust this control to set the burn rate of the re. For
optimal efciency, use a low to medium setting. If this
damper is closed at rst start-up, the re will burn very
slowly and could soot the appliance.
When shutting down the stove, fully open the air
control. This allows the chimney temperatures to
remain as high as possible for as long as possible. Cold
chimney temperatures create creosote. Figure 3: Air Control Rod.
Hole Size
ALL DIMENSIONS IN INCHES
TOLERANCE
General An
g
les
Hole Pos.
UNLESS OTHERWISE SPECIFIED
MATERIAL
Sherwood Industries Ltd.
Part Description

11
Specifications
clearances to comBustiBles - 1200-c insert:
A Minimum clearance to an unshielded side wall 10” (254 mm)
B Minimum clearance to an unshielded 8” (203
mm) mantel 21” (533 mm)
C Minimum top facing (protruding ¾” [19 mm])
clearance 17½” (445 mm)
D Minimum side facing (protruding ¾” [19 mm])
clearance 1” (25 mm)
E † From front of door opening to edge of oor
protection
USA 16” (406 mm)
CND 18” (450 mm)
F † From side/back of unit to edge of oor
protection
USA 6” (152 mm)
CND 8” (200 mm)
† FLOOR PROTECTION:
If unit is raised 0” - 2” (0mm-51mm); 1” (25mm) non-combustible material with k value = 0.84 or equivalent.
If unit is raised 2” - 8” (51mm-203mm); ½” (13mm) non-combustible material with k value = 0.84 or equivalent.
If unit is raised greater than 8” (203 mm) or more; any non-combustible material can be used.
Table 3: Reduction in (B) Minimum Clearance from 1200-C to 8” (203 mm) Mantel.
Type of protection Modied Clearance
A minimum of .013” (0.33mm) sheet metal spaced out 1” (25mm) by non-
combustible spacers. 10½” (267 mm)
Ceramic tiles, or eqivalent non-combustible material on non-combustible
supports and spaced out 1” (25mm) by non-combustible spacers. 14” (357 mm)
Ceramic tiles, or eqivalent non-combustible material on non-combustible
supports with a minimum of .013” (0.33mm) sheet metal spaced out 1”
(25mm) by non-combustible spacers.
10½” (267 mm)
NOTES:
(1) Mantel protection must have at least 3” (75mm) edge clearance on all sides, except as provided in Note 4.
(2) If an adhesive is used to support non-combustible material, it shall not lose adhesive qualities at temperatures
likely to be encountered and shall not contribute a signicant combustible load.
(3) Heat shield mounting hardware attached to combustible materials must be placed at the lateral extremities of
the shield.
(4) Minimum clearance to unprotected walls and ceilings must be maintained.
(5) Clearances may only be reduced with shielding acceptable to the local authority.
Table 4: 1200-C Insert Minimum Fireplace Size.
Masonry Zero Clearance
Minimum Depth 14½” (368 mm) 15” (381 mm)
Minimum Width at back of replace 22⅜” (568 mm) 23” (584 mm)
Minimum Width at front of replace 32” (813 mm) 32¼” (819 mm)
Minimum Height 19¼” (489 mm)**
or 19¾” (502 mm) 20” (508 mm)
** If the masonry lintel height is only 19¼” (489 mm) to 19¾” (502 mm) refer to instaLLation - Modifications for
instaLLation with 19¼” (489 MM) high LinteL - insert
B
A
D
C
Adjacent wall
FE
Table 2: 1200-C Insert Clearance to Combustibles.

12
Specifications
clearances to comBustiBles - 1700-c insert:
A Minimum clearance to an unshielded side wall 10” (254 mm)
B Minimum clearance to an unshielded 8” (203
mm) mantel 24” (610 mm)
C Minimum top facing (protruding ¾” [19
mm]) clearance 19½” (495 mm)
D Minimum side facing (protruding ¾” [19
mm]) clearance 1” (25 mm)
E † From front of door opening to edge of oor
protection
USA 16” (406 mm)
CND 18” (450 mm)
F † From side/back of unit to edge of oor
protection
USA 6” (152 mm)
CND 8” (200 mm)
† FLOOR PROTECTION:
If unit is raised 0” - 2” (0mm-51mm); 1” (25mm) non-combustible material with k value = 0.84 or equivalent.
If unit is raised 2” - 8” (51mm-203mm); ½” (13mm) non-combustible material with k value = 0.84 or equivalent.
If unit is raised greater than 8” (203 mm) or more; any non-combustible material can be used.
Table 6: Reduction in (B) Minimum Clearance from 1700-C to 8” (203 mm) Mantel.
Type of protection Modied Clearance
A minimum of .013” (0.33mm) sheet metal spaced out 1” (25mm) by non-
combustible spacers. 12” (305 mm)
Ceramic tiles, or eqivalent non-combustible material on non-combustible
supports and spaced out 1” (25mm) by non-combustible spacers. 16⅛” (408 mm)
Ceramic tiles, or eqivalent non-combustible material on non-combustible
supports with a minimum of .013” (0.33mm) sheet metal spaced out 1”
(25mm) by non-combustible spacers.
12” (305 mm)
NOTES:
(1) Mantel protection must have at least 3” (75mm) edge clearance on all sides, except as provided in Note 4.
(2) If an adhesive is used to support non-combustible material, it shall not lose adhesive qualities at temperatures
likely to be encountered and shall not contribute a signicant combustible load.
(3) Heat shield mounting hardware attached to combustible materials must be placed at the lateral extremities of
the shield.
(4) Minimum clearance to unprotected walls and ceilings must be maintained.
(5) Clearances can be reduced with shielding acceptable to the local authority.
Table 7: 1700-C Insert Minimum Fireplace Size.
Masonry Zero Clearance
Minimum Depth 19” (483 mm) 19½” (495 mm)
Minimum Width at back of replace 22⅜” (568 mm) 23” (584 mm)
Minimum Width at front of replace 32” (813 mm) 32¼” (819 mm)
Minimum Height 19¼” (489 mm)**
or 19¾” (502 mm) 20” (508 mm)
** If the masonry lintel height is only 19¼” (489 mm) to 19¾” (502 mm) refer to instaLLation - Modifications for
instaLLation with 19¼” (489 MM) high LinteL - insert
B
A
D
C
Adjacent wall
FE
Table 5: 1700-C Insert Clearance to Combustibles.

13
Specifications
dimensions - 1200-c insert:
Figure 4: 1200-C Insert Dimensions.
49 1
8" (1248mm)
35 1
16 " (891mm)
5" (127mm)
(553mm)
21 3/4"
22 5/16" (566mm)
"20 13
16
(528mm)
30 13
16 "
(783mm)
20 7/8"
19 9/16"
or
(484mm)
(497mm)
19 1/16"
(529mm)
14" (355mm)

Specifications
dimensions - 1700-c insert:
Figure 5: 1700-C Insert Dimensions.
14
35 1/16" (891mm)
26 1/4"
(667mm)
5" (127mm)
49 1/8" (1248mm) 22 5/16" (566mm)
20 7/8"
(470mm)
18 1/2"
(529mm)
(497mm)
19 1/16"
(484mm)
or
19 9/16"
30 13/16"
(783mm)
(528mm)
20 13/16"

Installation
Failure to follow these instructions carefully could cause personal injury or property damage.
removal From pallet:
• Remove the bricks from the unit before starting.
• Remove the two lag bolts (shown in Figure 6) that secure
the unit to the pallet from inside the rebox.
• Remove the shipping bracket at the rear of the unit.
Note: Before the bricks are installed, rivets
(Figure 2) must be placed in the two (2)
holes (shown in Figure 7) in the rebox that
lag bolts came out of. This is done to make
unit burn more efciently.
Figure 7:
Rivet. Figure 6: Bolts to remove.
15
modiFications For installation witH 191/16” (484mm) HigH lintel:
Insert Cabinet Top
Air Deflector
Figure 9: Removing Air Deector onto Cabinet Top.
Figure 8: Removing Cabinet Top from Unit.
The Boston has a factory height of 199/16” (497mm) and
it can be reduced to 191/16” (484mm) by modifying the
unit and the surround panel.
1. Remove the thirteen T-20 screws holding the cabinet
top in place (refer to Figure 8).
2. Remove the cabinet top and ip it onto its top.
3. Remove the Air Deector (shown in Figure 9) by
removing the two (2) T-20 screws.
4. Re-install the cabinet top onto the unit. The screw
holes along the top of the unit should now line up
with the top set of holes on the cabinet top.
Part De scripti on
SHEET
REV
11/15/2010
1200 Cast Insert
THIS DRAWING IS THE PROPERTY OF SHERWOOD INDUSTRIES LTD. AND MAY NOT BE COPIED, REPRODUCED, OR OTHERWISE DISCLOSED WITHOUT THE PRIOR APPROVAL OF SHERWOOD INDUSTRIES LTD.
DRAWN BY
CHECKE D BY
APPROVAL
Hole Size
+/- .001
ALL DIMENSIONS IN INCHES
TOLERANCE
THREAD S EXTER NAL CL 2 A INTE RNAL CL 2B
HEAT TR EATMEN T
DIMENS IONS AP PLY AFT ER PLAT ING OR
General
+/- .005
Angles
+/- .5
Hole Pos.
+/- .002
UNLESS OTHERWISE SPECIFIED
MATERI AL
Sherwood Industries Ltd.
HEAT TR EATMEN T
SCALE- N OT TO SCALE
FINISH
1 OF 1

Installation
masonrY Fireplace installation:
Unless you are experienced, we recommend installation by your dealer or a
professional installer.
Install only in a masonry replace with a good-condition chimney at least 15 ft (4.6 m) high, both of
which have been constructed in accordance with the building code. Refer to Tables 4 and 7 for minimum
masonry replace dimensions. Be sure the replace and chimney are clean and sound without any cracks
or loose mortar. Do not remove any bricks or mortar from the replace.
If there is a combustible oor in front of the
masonry replace, the replace insert must
be 8” (203 mm) above the combustible
oor, and oor protection must be provided
18” (457 mm) in front of the replace insert
and 8” (203 mm) to each side of the unit.
Refer also to sPecifications - cLearances to
coMbustibLes - 1200-c insert and sPecifications
- cLearances to coMbustibLes - 1700-c insert.
1. Remove any replace damper or fasten
in a permanent open position.
2. (IN CANADA) The stove is vented with
a 6” stainless steel liner that goes directly to
the top of the chimney and is covered with
a rain cap. The chimney top is sealed with
a ashing or steel plate that supports the
weight of the chimney liner. The installation
must conform to the liner’s manufacturer’s
instructions.
This replace must be installed with a
continuous liner of 6” diameter (CANADA
ONLY) extending from the replace
insert to the top of the chimney. The
chimney liner must conform to the Class 3
requirements of CAN/ULC-S635 Standard
for Lining Systems for Existing Masonry or
Factory-Built Chimneys and Vents, or CAN/
ULC-S640 Standard for Lining Systems for
New Masonry Chimneys.
(IN U.S.A.)The appliance when installed,
must follow local building codes, in the
absence of local building codes, with the
current NFPA 211 Standard for Chimneys,
Fireplaces, Vents, and Solid Fuel-Burning
Appliances.
Figure 10: Insert Installation into existing replace with
hearth.
16
Floor
Protection
Combustible Floor
Masonry Fireplace
8"
(203 mm)
Rain Cap
Steel Plate or Flashing
Flexible or Rigid 6"
Stainless Steel Liner
Mantel
Top Facing
Damper Removed
or Fastened Open
Sheet Metal Screws
Fastening Collar to
Stainless Steel Liner
Surround Panel
USA 16” (406 mm)
CND 18” (450 mm)

17
The ue collar is removable for installations
into replaces with low openings.
a) Remove the rear two (2) secondary
air tube and C-Cast Ceramic Bafes,
if installed (see c-cast ceraMic baffLe
instaLLation). Remove the secondary air
tubes by placing a screwdriver (any style
except at head) into one of the air holes
and tapping it with a hammer/mallet to
the left.
b) Unscrew the two (2) nuts on top of the
inside of the rebox, using a 9/16” wrench
or socket (see Figure 13). The Flue Collar
Clamps will slide off the bolts.
c) Pull the removable ue collar off the top
of the unit.
d) Attach the ue collar to the venting pipe
using sheet metal screws.
e) Push the unit into place while trying to
keep the collar attached to venting close
to the opening on the top of the unit.
Figure 12: Insert Installation into existing oor level
masonry replace.
Installation
Figure 11: Insert Installation into existing replace without
hearth.
f) Place the Collar Puller, over the two bolts of the Flue
Collar and pull it into place (see Figure 14). Ensure that
the bolts are to the left and right of the hole. If they are
not, the front secondary air tube will need to be removed
in order to install or remove the C-Cast Ceramic Bafes.
g) Slide the Flue Collar Clamps and washers over the bolts,
and screw the nuts back onto the bolts.
h) Re-install C-Cast Ceramic Bafes and the rear two
(2) secondary air tube (see c-cast ceraMic baffLe
instaLLation).
3. There are four (4) leveling legs (shown in Figure 15), two
(2) on each side, one at the back and one at the front of the
unit. Adjust the legs using a ⅜” wrench to ensure the unit is
stable.
Figure 13: Attaching removable ue collar.
Firebox Top
Cut-away
Vent pipe
Removable
Flue Collar
Collar Puller
Gasket
Flue Collar Clamp
Washer
Nut
Floor Protection
Combustible Floor
Masonry Fireplace
8"
(203 mm)
USA 16” (406 mm)
CND 18” (450 mm)
Combustible Floor
Masonry Fireplace
USA 16” (406 mm)
CND 18” (450 mm)
1" (25mm)
Non-Combustible Board (K 0.84)

Installation
Leveling Legs
Figure 14: Removable ue collar in place.
Figure 15: Leveling legs.
surround panel sealed installation For usa onlY:
Note: Though this is an allowable installation, we do not recommend it because of the possibility of poor
draft, and therefore poor stove performance.
Before starting this type of installation refer
to instaLLation - Masonry firePLace instaLLation
- insert for additional information. For
clearances refer to sPecifications - cLearances
to coMbustibLes - 1200-c insert and
sPecifications - cLearances to coMbustibLes -
1700-c insert.
1. Before the face plate is installed onto
the unit, glue a 6” (150mm) wide R20
berglass insulation strip around the
perimeter of the back of the panels using
RTV silicon or stove gasket cement.
When the face plate is installed onto
the unit the insulation must overlaps the
replace opening to form a seal between
the masonry replace and the unit’s face
plate. Let the silicon or cement dry.
2. To make the installation of the surround
panel onto the unit easy have the unit 6”
(150mm) out from the replace,
3. Push the insert into the replace, allowing
the insulation to form a seal between
the panels and the replace. Tuck any
exposed insulation behind the face plate. Figure 16: Installation with Surround Sealed.
4. Screw or nail the provided metal plate with the
wording “THIS FIREPLACE HAS BEEN ALTERED
TO ACCOMMODATE A FIREPLACE INSERT AND
SHOULD BE INSPECTED BY A QUALIFIED PERSON
PRIOR TO THE RE-USE AS A CONVENTIONAL
FIREPLACE.” to the inside of the replace.
18
Masonry Fireplace
Mantel
Damper Removed
or Fastened Open
Surround Panel
USA 16” (406 mm)
CND 18” (450 mm)
Insulation Around the
Back of the Face Plate
NOTE: To use this type of installation we
recommend your chimney have a minimum
cross-sectional area of 28 and a maximum of
144 square inch. If it is not within this range
your chimney may not have sufficient draw
for the fireplace to operate correctly. The
required cross-section may vary depending
on climate and if the chimney is inside (better)
or outside.

19
Installation
installation using a Block-oFF plate For usa onlY:
If this unit is to be installed into a masonry replace or a zero-clearance replace with a direct connection
you must install a non-combustible seal-off device such as a block-off plate or damper adapter. By
installing a block-off plate you seal the chimney, ensuring that no smoke enters the home and sealing the
chimney to encourage draft. To construct a block-off plate follow the below steps.
Before starting this type of installation refer to instaLLation - Masonry firePLace instaLLation - insert for
additional information. For clearances refer to sPecifications - cLearances to coMbustibLes - 1200-c insert
A
B
C
D
Front of fireplace opening.
A
B
C
and sPecifications - cLearances to coMbustibLes - 1700-c insert.
See Figure 19 and 20 for examples of a masonry replace and a
zero-clearance replace with a direct connection.
1. Determine where the block-off plate will be installed; above
the top of the rebox (it must be high enough to easily install
the connection pipe) but below the damper area. Look for a
location that is level and in an area where the plate can be
mounted easily.
The measurement that will be needed are as followed (refer
to Figure 17 and 18):
A - The width at the front of the rebox at the height where
the block-off plate will be installed.
B - The width at the back of the rebox at the height where
the block-off plate will be installed.
C - Then depth of the block-off needed (the distance
between A and B).
D - The distance of the center of the ue to the front of the
replace opening. Refer to Step 3.
NOTE: In general masonry replaces have square reboxes
while zero-clearance (metal) replaces have domed rebox
tops. Therefore zero-clearance block-off plates may be more
difcult to install. Insulation may be used around the edges
to simplify sealing the plate.
2. Create a cardboard template of the dimensions with 2” (51
cm) wide anges on each side. These anges will be used to
mount the block-off plate to the inside of the rebox. Bend
the anges downwards on the template and place it inside
the replace. Continue on if the template ts correctly in
its planned location. If the template does not t, make a
new template with the required corrections until it does t
correctly.
3. With the template in place, mark the location for the center
of the ue pipe when the unit is in place. If installing a
1200-C the distance will be approximately 8¼” or 9 15/16”
back from the replace opening. If installing a 1700-C the
distance will be approximately 12¾” or 14 7/16” back from
the replace opening. Remove the template and cut a 6¼”
diameter hole centered on this mark.
Figure 17: 3D of Dimensions needed from
the Fireplace.
Figure 18: Layout of the Block-Off Plate.

Installation
4. Using the template make the block-
off plate of 24 gauge or thicker steel.
Drill two (2) holes in each ange for
mounting the plate.
5. Mount the block-off plate using
masonry screws in a masonry
replace and sheet metal screws on a
zero-clearance replace (screws need
only be long enough to penetrate the
rst layer of metal).
6. Insulate the block-off plate using high
- temperature berglass insulation
and furnace cement.
7. After installing the unit into place and
the pipe through the block-off plate,
use high - temperature berglass
insulation and furnace cement to seal
any gaps between the pipe and block-
off plate (allow the cement to dry for
at least 24 hours before burning).
Figure 19: Insert Install into a Zero-Clearance Fireplace.
Fig. 20: Masonry Fireplace Direct Connection Insert
20
Mantel
Surround Panel
USA 16” (406 mm)
CND 18” (450 mm)
Block-off plate or
damper adaptor.
Stainless steel chimney
connector must extend
12" (305mm) past the
block-off plate.
Damper must
be removed
Zero-clearance
(metal) firebox
Masonry Fireplace
Mantel
Damper removed
or fastened open
Surround Panel
USA 16” (406 mm)
CND 18”
(450 mm)
Block-off plate or
damper adaptor.
The stainless steel
chimney connector
must extend 12"
(305mm) past the
block-off plate.
Zero Clearance Notes:
The replace must not be altered, except for the exceptions below. The
permanent metal warning label provided must be attached to the back of the
replace, stating that the replace may have been altered to accommodate
the insert, and must be returned to original condition for use as a conventional
replace. The following modication of factory built
replaces are permissible: removal of damper, removal
of smoke shelf or bafe, removal of ember catches,
removal of re grate, removal of viewing screen/curtain,
and removal of doors. The factory built chimney must be
listed per UL 127 (US), and meet type HT requirements
of UL 103 (US). Factory built replace chimneys tested
to UL 127-1998, may be at the replace manufacturer’s
option, tested to the same criteria as UL 103 HT
requirements. If the chimney is not listed as meeting HT
requirements, or if the factory built replace was tested
prior to 1998, a full height listed chimney liner must be
installed from the appliance ue collar to the chimney top.
The liner must meet type HT requirements (2100°F) per
UL 1777 (US). The liner must be securely attached to the
insert ue collar and the chimney top. To prevent room
air passage to the chimney cavity of the replace, seal
either the damper area around the chimney liner with high
temperature sealant or the replace front with berglass
batting.