Burntech OFS 39 User manual

Instructions
Vent Free Universal Masonry Firebox
Models OFS/TFS 39/44/49VF
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electrical switch; do
not use any phone in your building.
Immediately call your gas supplier from
a neighbor’s phone and follow the gas
supplier’s instructions.
If you cannot reach your gas supplier,
call the fire department.
Installation and service must be
performed by a qualified installer, service
agency, or the gas supplier.
•
•
•
•
nWARNING:
If the information in these instructions is
not followed exactly, a fire or explosion
may result causing property damage,
personal injury or death.
REV 18 NOV 2009
This firebox has been tested and approved by PFS
under ANSI Z21.91 for use with any ANSI Z21.11.2
approved gas logs.
FOR USE ONLYWITHALISTED GAS-FIRED UNVENTED
DECORATIVE ROOM HEATER NOT TO EXCEED 40,000
BTU/HR
DO NOT BUILD A WOOD FIRE.
Carefully review the instructions supplied with the decorative
type unvented room heater for the minimum fireplace size
requirement.
DO NOT INSTALL AN APPLIANCE IN THlS FIREBOX
UNLESS THlS FIREBOX MEETS THE MINIMUM
DIMENSIONS REQUIRED FOR THE INSTALLATION.
IMPORTANT: READ THESE INSTRUCTIONS
CAREFULLY BEFORE STARTING
INSTALLATION OF THIS FIREPLACE.
Do not store gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases, unless a certified kit is used.
Installer: Leave these instructions with the consumer.
Consumer: Retain for future reference.
Report No. 08-154
ICC Evaluation Services
Report No. 2401
VENT FREE

Fireplace Parts Diagram .........................................................................................Pg. 2
Fireplace Parts List .................................................................................................Pg. 3
General Information ................................................................................................Pg. 4
Safety Information ................................................................................................... Pg. 5
Location................................................................................................................... Pg. 6
Supporting Floor Systems....................................................................................... Pg. 6 ~ 7
Burntech Weight Determinations .........................................................................Pg. 8
Clearances .............................................................................................................. Pg. 9,10
Air for Combustion and Ventilation.......................................................................... Pg. 10,11
Important Pre-installation Information ..................................................................... Pg. 12
Fireplace Assembly Procedures.............................................................................. Pg. 13 ~ 15
Gas Piping Installation ............................................................................................Pg. 15
Electrical Line Feed................................................................................................. Pg. 15
Firebrick Liner Installation ....................................................................................... Pg. 16
Initial Fireplace Operation ....................................................................................... Pg. 16
Appendix I ............................................................................................................... Pg. 17
Appendix II .............................................................................................................. Pg. 18
Warranty Information............................................................................................... Pg. 19
CONTENTS
CONTENTS
FOR USE WITH LISTED ANSI Z21.91-2007 UNVENTED DECORATIVE
ROOM HEATERS NOT TO EXCEED 40,000 BTU/HR (11.723W) CONSULT
WITH INSTRUCTIONS FOR THIS FIREBOX FOR FURTHER INFORMATION.
Refer to installation instructions and check local codes prior to installing. This appliance
must be installed in accordance with local codes if any, if not, in accordance with the
National Fuel Gas Code ANSI Z223.1 or CAN/CGA B.149 installation codes.
REV 18 NOV 2009
ANSI Z21.91-2007 Ventless Firebox Enclosures for Gas-Fired Unvented Decorated Room Heaters.
0” - 10” : NO PROJECTIONS
10” - 16” : 1-1/2” MAX. PROJ.
16” - 22” : MAX. PROJ.
22” & ABOVE : 10” MAX. PROJ.
DISTANCE FROM SIDE OPENINGS
3” MIN. : 1-3/4” MAX. PROJ.
MANTEL CLEARANCES
THIS APPLIANCE NEEDS FRESH AIR FOR SAFE OPERATION
AND MUST BE INSTALLED SO THERE ARE PROVISIONS
FOR ADEQUATE COMBUSTION AND VENTILATION AIR.
DO NOT REMOVE THIS LABEL
SERIAL No.
MODEL No.:
DATE OF MFG:
BOTTOM 0”
0”
42”
18 1/2”
TOP/
BACK/
SIDES
OPENING
TO CEILING
CLEARANCES TO COMBUSTIBLES
RECESS
DEPTH
Tested & Listed By
Report No.
08-154
ICC Evaluation
Services Report
No. 2401
Below is a sample picture of arating plate that is typically located inside the lower dome side of your fireplace.
The Rating Plate will have a Model Number, Date of Manufacture and Serial Number stamped on the plate where indicated.

2
Fireplace Parts Diagram
Fireplace Parts Diagram
Figure 1
Exploded Diagram
5
9
12
2
7
1
3A
2X
2X
3X
7X
2X
8
X
3
6
11
WARNING
Failure to position the parts in
accordance with these diagrams or
failure to use only parts specifically
approved with this appliance may result
in property damage or personal injury.
Customer Service & Parts Replacement
Parts and accessories may be purchased from your local
dealer. Additional information is available from Burntech
Fireplace Solutions. Accessory orders will be accepted by
mail, or you may call your order in at: [phone].

3
Optional Outside Ø4”
Combustion Air Kit
Model No.: MFP4-AK
(Ø4” Ducting not included)
Only the following
doors have been tested
and approved for use
with this fireplace:
Crown-Breckinridge
or
McKenzie-Pendelton
Refractory Firebrick Liners
(Herringbone Pattern shown, also available
in Running Bond - see Pg.16)
OFS/TFS (39,44,49)SHBL- Herringbone
OFS/TFS (39,44,49)FRBL- Running Bond
MFP39/44/49VFOFS/TFS39-44-49 VF Fireplace Parts List
ITEM P/N DESCRIPTION QTY
1 OFS/TFS39-1
OFS/TFS44-1
OFS/TFS49-1
HEARTH (Left or Right) 2
2 OFS/TFS39-2
OFS/TFS44-2
OFS/TFS49-2
REAR WALL 4
3 OFS/TFS39-3
OFS/TFS44-3
OFS/TFS49-3
SIDE WALL 7
OFS/TFS 39-3A
OFS/TFS 44-3A
OFS/TFS 49-3A
SIDE WALL with 4” hole for Air Kit 1
5 OFS/TFS 39-5
OFS/TFS 44-5
OFS/TFS 49-5
DOME REAR - LOWER 1
6 OFS/TFS 39-6
OFS/TFS 44-6
OFS/TFS 49-6
LINTEL 1
7 OFS/TFS 39-7
OFS/TFS 44-7
OFS/TFS 49-7
DOME SIDE - LOWER 2
9 OFS/TFS 39-9
OFS/TFS 44-9
OFS/TFS 49-9
DOME TOP 1
11 OFS/TFS 170 RATING PLATE 1
12 #3 REBAR (Ø3/8”) x 36” 8
3A

4
General Information
General Information
Introduction
We extend a warm welcome from all of us at Burntech
Fireplace Solutions, proud manufacturers of Burntech
Modular Masonry Fireplaces.
Before Beginning the Installation
Read these instructions carefully before beginning the
installation of this Vent-Free fireplace. Also read the gas
log appliance manufacturer’s literature regarding sizing and
suitability for installation into this Enclosure prior to installation.
Statement of Intended Use:
The Burntech Vent-Free Universal Masonry Fireplace is a
modular refractory masonry unit designed for fieldassembly.
The fireboxisconstructedusingpre-cast,interlocking
refractory blocks. The blocks are then secured to each other
using Mortar. The system includes all parts necessary for the
assembly of a complete masonry vent-free decorative gas log
enclosure.
In addition to the basic enclosure, a standard
1-1/8” thick, high temperature refractory brick is
required to line the interior of the firebox.
These fireplaces are not intended to serve as
a primary heat source, rather, the fireplace was
expressly created as a supplemental source of
heat.
The Burntech Vent Free Fireplace is Designed
for Use Only with any Vent free decorative gas
log sets meeting standard ANSI Z21.11.2
Vent free decorative gas log sets meeting
standard ANSI Z21.11.2, are supplied by others
and are limited to any listed vent-free gas-fired
log sets with heat input ratings up to 40,000
Btu/hr.
WARNING: Any application other than the
“Intended Use” as stated above is in violation
of the manufacturer’s instructions and is hereby
prohibited. Such violation may cause immediate
hazard, property damage or loss of life and will
void all liabilities to the manufacturer and will
void all warranties explicit or implied.
Product Overview
Burntech fireplaces are designed as Factory Built - Field
Assembled Fireplaces to be installed on both combustible
and non-combustible floorsystems.Theyhavebeen
extensively tested to perform with excellent results in this
environment.
Attention: Be advised that all the illustrations in this manual
are for general reference only. They are not drawn to scale.
Actual design elements will vary from case to case. Pay
attention to specified minimum clearances as they relate to
combustible materials.
SECTION A-A
W1
W3
W2
23 1/8"
28"
38 3/4" 46 3/4"
7 1/8"
21"
4 1/2"
32 5/8"
A
A
Figure 2
Model W1 W2 W3
OFS/TFS39VF 43” 39” 29-1/4”
OFS/TFS44VF 48” 44” 34-1/4”
OFS/TFS49VF 53” 49” 39-1/4”
OUTSIDE AIR ACCESS
Please call us with any installation questions or concerns at
[phone], We are here to help.

5
Safety Information
Safety Information
Carbon Monoxide Poisoning: Early signs of carbon monoxide
poisoning resemble the flu, with headaches, dizziness, or
nausea. If you have these signs, the fireplace may not be
working properly. Get fresh air at once! Have the fireplace
serviced.
Note: Some people are affected more than others by carbon
monoxide. These may include pregnant women, people with
heart or lung disease, are anemic, anyone under the influence
of alcohol, and those at high altitude.
IMPORTANT: Read this owners manual carefully
and completely before trying to assemble, operate,
or service this fireplace. Improper use of this
fireplace can cause serious injury or death from
burns, fire, explosion, electrical shock, and carbon
monoxide poisoning.
General Safety Concerns
1. If you smell gas
OShut off gas supply.
ODo not try to light any appliance.
ODo not touch any electrical switch; do not use any
phone in your building.
O immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
O If you cannot reach your gas supplier, call the fire
department.
2. This fireplace shall not be installed in a bedroom or
bathroom.
3. Never install the fireplace
O In a recreational vehicle.
O Where curtains, furniture, clothing, or other flammable
objects are less than 36 inches from the front, top, or
sides of the fireplace.
O In high traffic areas.
O In windy or drafty areas.
4. Do not use this fireplace as a wood-burning fireplace.
5. Do not add extra logs or ornaments such as pine cones,
vermiculite, or rock wool. Using these added items can
cause soot build-up.
6. This fireplace is designed to be smokeless. If logs appear
to smoke, turn off fireplace and call a qualified service
person.
7. Avoid any drafts that alter burner flame patterns. Do not
allow fans to blow directly into the fireplace. Do not place
a blower inside burn area of the firebox. Ceiling fans may
create drafts that alter burner flame patterns. Soot build-up
and improper burning will occur. Soot build-up can settle on
household surfaces outside the fireplace.
8. This fireplace needs fresh air ventilation to run properly.
The Vent free decorative gas log set must have an
oxygen depletion sensor (ODS) pilot light safety system.
The ODS shuts down the fireplace if not enough fresh
air is available. See Air for Combustion and Ventilation,
page 8. If the fireplace keeps shutting off, see appliance
manufacturers’ troubleshooting instructions.
9. Do not run fireplace
O Where flammable liquids or vapors are used or stored.
O Under dusty conditions.
10. Do not use this fireplace to cook food or burn paper or
other objects.
11. Never place any objects in the fireplace or on logs.
12. Fireplace screens must be provided and are to be closed
before operating the decorative room heater. If doors are
installed, they must be open during operation. Fireplace
front and screen become very hot when running fireplace.
Keep children and adults away from hot surfaces to avoid
burns or clothing ignition. The fireplace will remain hot
for a time after shut down. Allow surfaces to cool before
touching.
13. Carefully supervise young children when they are in the
room with the fireplace.
14. Do not use fireplace if any part has been exposed to or
under water. Immediately call a qualified service technician
to inspect the fireplace and to replace any part of the control
system and gas control which has been under water.
15. Do not operate the fireplace if any log is broken. Do not
operate the fireplace if a log is chipped (dime-sized or
larger). Verify proper log placement prior to operating
appliance.
16. Turn fireplace off and let cool before servicing. Only a
qualified service person should service and repair the
fireplace.
17. Operating the fireplace above elevations of 4,500 feet
may cause pilot outage.
DO NOT USE OR STORE GASOLINE OR OTHER
FLAMMABLE LIQUIDS OR GASES IN OR NEAR THE
FIREPLACE!
ATTENTION: A fire or an explosion could occur causing property
damage, injury or loss of life if you do not follow the information
in this manual!
NOTE: THIS MANUAL MUST BE REPRODUCED ONLY IN
ITS ENTIRETY.
Carefully review the instructions supplied with the decorative
type unvented room heater for the minimum firebox size
requirement.
DO NOT INSTALL THE APPLIANCE IN THIS
FIREBOX UNLESS THIS FIREBOX MEETS THE
MINIMUM DIMENSIONS REQUIRED FOR THE
INSTALLATION.
When choosing a location for your fireplace, avoid locations
that are subject to too much draft or locations where you may
encounter obstructions that may be in the way of the fireplace
once installed. Always check local codes and familiarize yourself
with the surrounding construction.
nDANGER:
Carbon monoxide poisoning may lead to
death!

6
Location
Location
Note: You may need to provide combustion and ventilation air
from an outside source to adequately satisfy local codes so
avoid installing a combustion air inlet where the opening could
be blocked by snow, bushes or other obstacles. Note that the
access for outside air inlet is located on the right hand side of
the fireplace.
Internal
Wall
Installation
Full
Projection
Installation
Flush
Installation
Corner
Installation
Figure 3
A flush installation is recommended where living space is
limited or at a premium. Check local codes for any restrictions.
W
H
D
Figure 4
Model W H D
*****39VF 43” 41” 28”
*****44VF 48” 41” 28”
*****49VF 53” 41” 28”
Projected installations can extend any distance into the room.
A projection may be ideal for a new addition on an existing,
finished wall.
Corner installations make use of space that may not normally
be used and provides a wider and more efficient range for heat
disbursement.
An internal wall installation provides a discreet option for
room separation and can also be ideal as an addition to an
existing wall.
IMPORTANT: Vent-free heaters add moisture to the air. Installing
a fireplace in rooms without enough ventilation air may cause
mildew to form from too much moisture.
IMPORTANT: Make sure the fireplace is level. If the fireplace is
not level, the log set will not work properly.
Attention: You will need a building permit to install a Burntech
fireplace. Check with the local jurisdiction before you get
started.
Supporting Floor Systems
Floor Framing
It is important to take into consideration that the load for the
Burntech Fireplace is considerable, but, more important, that it
is a dead load that will have to be absorbed by a relatively
small amount of existing floor space.
It is the ultimate responsibility of the installer to ensure that
proper concrete slab supports are used.
WARNING to the licensed design professional and/or building
contractor: It is your responsibility to be certain that the
Burntech can be properly supported by the combustible floor
system on which the fireplace will rest.
For fireplace support foundations installed on concrete refer to
Appendix I and II (pages 17 & 18) for specific instructions.
Rebar locations
Lay-out the position of the fireplace and drill holes where
the rebar will be located. Secure the #3 rebar 4 inches into the
concrete foundation with ITW Epoxy or Simpson Epoxy. Follow
manufacturer’s instructions for installation of rebar into slab.
Wood Floor
Anchorage of fireplace to wood floor construction is required.
Refer to Figure 8 for anchorage dimensions. Four anchors are
required to attach to the sub-flooring framing.
Crawl Space or Upper Floor:
For installation of firebox over combustible crawl spaces or
upper floors, anchorage of the firebox is required. Illustrations
of examples of possible anchorage methods are shown in
Figures 5 thru 7 depending upon the type of floor framing. Final
method of anchorage is to be determined by licensed design
professional.

7
For conventional framing, where the floor joists are parallel
with the sides of the firebox, the addition of floor joists to align
with the anchor brackets allows the brackets to be directly
connected to the floor joists.
Note that additional floor joists may be required to support
the weight of the firebox and chimney. Where the floor joists run
parallel to the front of the firebox, anchorage can be accomplished
in like manner as shown in Figure 5 using blocking between the
floor joist.
For floors supported by I-Joists, the method of anchorage is
illustrated in Figures 6 and 7. Figure 10 illustrates the general
arrangement of anchorage to floor framing.
It is important to take into consideration that the load for the
Burntech Fireplace must be considered as additional dead
load that will have to be supported by the floor framing.
Additional floor joists or I-joists may be required as
determined by the licensed design professional.
The dead weights for the fireplace are noted in Table I. It is
the task and responsibility of the general contractor/installer to
see that the proper reinforcement for weight loads are made by
a licensed design professional prior to the fireplace installation.
As stated above, it is desirable to place additional framing
for alignment of anchor rods. Refer to Figure 10 for anchor rod
locations.
Figure 5
Floor Sheathing
not shown for
clarity
Anchor Bracket
Assembly
EXAMPLE ONLY
2X FLOOR JOIST
2X FLOOR JOIST
A35 Brackets
(16 required)
I-Joist
Simpson
Strong-Tie
A-35 or
equivalent
Figure 6
I-Joist Anchoring
Top View
Example Only
I-JOISTS
Anchor
Brackets
Figure 7
I-Joist
Anchoring
Bottom
View
Example Only

8
Table I
Fireplace Model OFS/TFS39VF OFS/TFS44VF OFS/TFS49VF
Fireplace Weight 809 lbs. 896 lbs. 987 lbs.
Mortar, Rebar &
Ready Mix Concrete 350 lbs. 357 lbs. 364 lbs.
Firebrick Lining 333 lbs. 345 lbs. 356 lbs.
Floor Area 43” x 28” (8.12 ft²) 48” x 28” (9.33 ft²) 53” x 28” (10.30 ft²)
Other Weight Considerations:
Fireplace finished facing (surround): This information needs to be obtained from the contractor.
Table II - Deflection Limits
Construction L S or W D +L1
Floor Members I/360 --- I/240
1For wood structural members having a moisture content of less than 16 per cent at time of installation and used under dry
conditions, the deflection resulting from L + 0.5D is permitted to be substituted for the deflection resulting from L + D.
Note that Burntech cannot accept responsibility for structural floor support details. All drawings are presented as mere
illustrations to indicate the presence of the underlying floor system. It is the responsibility of the general contractor/installer to
consult with a local licensed design professional for guidance in building a proper floor support system.
F
10"
4"
Figure 8
A
Model A
OFS/TFS39VF 38-3/4”
OFS/TFS44VF 43-3/4”
OFS/TFS49VF 48-3/4”
Figure 9
Fireplace
outline
10”
Typical Anchorage
Layout
EXAMPLE ONLY
SECTION VIEW
ROTATED 90CW
Figure 10
Burntech Weight Determination

9
Clearances
Clearances
The Importance of Clearances
Warning to the structural engineer and/or building contractor: It
is your responsibility to be certain that the Burntech can be
properly supported by the combustible floor system on which
the fireplace will rest. Be advised that this engineering
equation will be in addition to any live or dead weights that the
floor has to carry.
Clearances to Combustibles
Nothing is more important than paying strict attention to
giving clearance between fireplace surfaces and surrounding
“combustibles” the most common of which are:
ODrywall
OWood flooring
OPlywood sub-flooring
OFraming materials
OParticle board
OMill board
OPlywood paneling
Required Clearances are:
Unit front, sides, rear: ..........................................0"
Combustible Floor: ............................................. 0"
Combustible Sheathing above opening top: .......8" (200 mm)
Sheathing or trim to opening sides: ....................8" (200 mm)
Mantle above opening: .......................................12" (300 mm)
Opening to sidewall: ...........................................24" (500 mm)
Insulation from firebox: .......................................0"
The Burntech Vent-Free fireplace may be installed at “zero
clearance” to plywood sheathing and to uninsulated wood
framing members at the unit bottom, sides, rear and top when
used for enclosing any listed vent-free gas-fired log set with
maximum heat input ratings up to 40,000 Btu/hr. However,
when a Vent-Free fireplace is to be installed on carpeting,
wood flooring, or any combustible material other than tile or
concrete, the Vent-Free fireplace shall then be installed on a
metal or wood platform extending the full width and depth of
the Vent-Free fireplace.
Clearance to Combustible Trim:
Burntech Vent-Free Fireplaces are designed to be custom fi
nished with facing trim and mantle to be an owner option.
However, all such trim material must meet standard fireplace
code requirements.
Non-combustible facing material must be applied to a
minimum of eight inches (8”) beyond the sides of the finished
opening of the Vent-Free fireplace and non-combustible facing
material must cover a minimum of twelve inches (12”) above
the finished opening of the installed unit.
Figure 11
1-1/2”
8” MIN
NON-
COMBUSTIBLE
FACIA
Figure 12
1-1/2”
12” MIN
NON-COMBUSTIBLE
FACIA
Clearance to combustible trim are those distances required
to ensure that combustible mantle and facing material will not
be exposed to excessive heat while the unit is operating.
These clearances should be adequate to prevent
discoloration or warping of trim facings due to heat. However,
circumstances unique to each installation create variables that
may be beyond the scope of this manual. Therefore be sure
to follow gas log appliance manufacturer’s explicit installation
instructions regarding all minimum trim facing, mantle height
and side wall clearance requirements.
Figure 13
Parts of the combustible mantle assembly located above
and projecting more than one and one-half inches (1-1/2”)
inches from the firebox opening shall be kept at least twelve
inches (12”) from the top of the opening.
Mantle shelves with horizontal projection of ten inches (10”)
from the face of the fireplace must be held to a minimum vertical
distance of twenty inches (20”) from the top of the finished
fireplace opening.
Note:Mantle height clearances may vary among gas log
appliance manufacturers or with the use of firebox canopies.
Be sure to follow the gas log appliance manufacturer’s
explicit installation instructions for mantle height clearance
requirements.

10
Interior Wall Materials:
Wall materials, such as drywall, should be set flush with
the rough front face of the Vent-Free fireplace. This will allow
for placement of required non-combustible surround material in
such a way that the surround material can lay flat against the
finished wall surface and also align with the leading edge of the
fire brick interior of the Vent-Free fireplace (see Figure 15).
Trim Facings:
Parts of the combustible mantle assembly located along
the sides of the firebox opening, which project more than one
and one-half inches (1-1/2”) from the face of the fireplace, shall
be kept at least eight inches (8”) from the firebox opening.
Adjoining Room Walls:
Interior wall surfaces of adjoining room walls must be at a
minimum horizontal measure of twenty four inches (24”) away
from the finished opening of the Vent-Free fireplace.
D1
W
1-1/2”
8” MIN. NON-COMBUSTIBLE MATERIAL
FRAMING
Figure 14
Model W D1
OFS/TFS39VF 43” 73-1/2”
OFS/TFS44VF 48” 77”
OFS/TFS49VF 53” 80-1/2”
1-1/2”
8” MIN
20”
MIN
8” MIN. NON-COMBUSTIBLE MATERIAL
FRAMING
Figure 15
Air for Combustion and Ventilation
Air for Combustion and Ventilation
Energy efficient homes require homes to be airtight but at the
same time provide sufficient fresh air to breathe. Fresh air
enters the home through air conditioning duct vents, around
doors and windows but also must provide enough fresh air for
proper combustion on all fuel-burning appliances in the home.
Exhaust fans, fireplaces, clothes dryers, and fuel-burning
appliances draw air from the house to operate. You must provide
adequate fresh air for these appliances. This will insure proper
venting of vented fuel-burning appliances.
Non-combustible
Flex Hose
Figure 16 Exterior
Providing Adequate Ventilation
In accordance with the National Fuel Gas Code NFPA 54/ANSI
Z223.1, Section 5.3, Air for Combustion and Ventilation, all
spaces in homes fall into one of the three following ventilation
classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The following information will help you classify your space and
provide adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and windows may provide
enough fresh air for combustion and ventilation. However,
in homes of unusually tight construction, you must provide
additional fresh air. Unusually tight construction is defined as
construction where:
a. Walls and ceilings exposed to the outside atmosphere have
a continuous water vapor retarder with a rating of one perm*
or less with openings gasketed or sealed and...
b. Weather stripping has been added on openable windows and
doors and...
c. Caulking or sealants are applied to areas such as joints
around window and door frames, between sole plates and
floors, between wall-ceiling joints, between wall panels, at
penetrations for plumbing, electrical, and gas lines, and
other openings.
* A perm is a unit of permeance or water vapor transmission,
the US perm-inch is defined as the passage of 1 grain of vapor
through 1 square foot of 1 inch thick material in 1 hour under a
pressure difference of 1 inch of mercury.
If your home meets all the three criteria above, you must provide
additional fresh air.

11
Unconfined Space
An unconfined space has a minimum total air volume of
50 cu.ft. (cubic feet) for each 1,000 Btu/Hr input rating of all
appliances in the total space (cu.ft. = length x width x height
of space). Include adjoining rooms only if there are doorless
passageways or ventilation grills between the rooms. If the Btu
per 50 cu.ft. is less than 1,000 Btu/Hr, then fresh air will be
provided by the natural air flow into the house.
Confined Space
A confined space has an air volume of less than 50 cu.ft. for
each 1,000 Btu/Hr input rating of all appliances in the space (cu.
ft. = length x width x height of space). Include adjoining rooms
only if there are door less passageways or ventilation grills
between the rooms.
Determining Total Air Volume
Use this work sheet to determine if you have a confined
or unconfined space. The space to be considered includes not
only the room in which you will install the fireplace but also any
adjoining rooms with ventilation grills between them or door
less passageways.
1. Determine the total volume of your space
L x W x H = _______ cu.ft.
Example: Space size = 20 ft. long x 20 ft. wide x 8 ft. high
(ceiling height) = 3,200 cu.ft.
If adjoining ventilation to adjoining room is supplied with
grills or openings, add the volume of these rooms to the total
volume of the space.
2. Divide the space volume by 50 cu.ft. to determine the
maximum Btu/Hr the space can support.
_______ cu.ft. (volume of space)
50 cu ft. = (Maximum Btu/Hr the space can support)
Example: 3200 cu ft. (Volume of space) / 50 cu. Ft. = 64.0 or
64,000 (maximum Btu/Hr the space can support.)
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free fireplace _______ Btu/hr
Gas water heater* _______ Btu/hr
Gas furnace _______ Btu/hr
Vented gas heater _______ Btu/hr
Gas fireplace logs _______ Btu/hr
Other gas appliances* _______ Btu/hr
Total = _______ Btu/hr
Example: Gas water heater 40,000 Btu/hr
Vent-free fireplace +36,000 Btu/hr
Total = 76,000 Btu/hr
* Do not include direct-vented gas appliances. Direct vent draws
combustion air from the outdoors and vents to the outdoors.
4. Compare the maximum Btu/Hr the space can support with
the actual amount of Btu/Hr used.
_________ Btu/Hr (maximum the space can support)
_________ Btu/Hr (actual amount of Btu/Hr used)
Example:
64,000 Btu/Hr (maximum the space can support)
76,000 Btu/Hr (actual amount of Btu/Hr used)
The space in the previous example was a confined space
because the actual Btu/Hr used was more than the maximum
Btu/Hr the space could support. If you find you have a Confined
Space, you must provide additional fresh air. Your options are
as follows:
a) Re-work worksheet, adding the space of an adjoining room
that may not have qualified for the extra volume. If the extra
space provides enough volume to convert the area to an
unconfined space, remove door to adjoining room or add
ventilation grills between rooms.
b) Vent room directly to the outdoors.
c) Install a lower Btu/Hr gas log (if lower Btu/Hr size makes
room unconfined).
If the actual Btu/Hr used is less than the maximum Btu/Hr the
space can support, the space is an unconfined space. You will
need no additional fresh air ventilation.
WARNING:If the area in which the heater may be operated
is smaller than that defined as an unconfined space, provide
adequate combustion and ventilation air by one of the methods
described in the National Fuel Gas Code, ANSI Z223.1 Section
5.3 or applicable local codes.
Local codes may have stricter definitions for confined space
and/or for unusually tight construction. Installing our optional
outside air kit may allow the space to be classified as not being
unusually tight or being an unconfined space. Check you local
codes.
IMPORTANT:Do not provide openings for inlet or outlet air
into an attic if the attic has a thermostat-controlled power vent.
Heated air entering the attic will activate the power vent.

12
Important Pre-installation Information
Important Pre-installation Information
Overview
You will find that the Burntech Fireplace is designed for
complete assembly at your construction site with all necessary
items delivered consisting of interlocking precast parts, 50 lbs.
of Burntech mortar and rebar.
The parts of thefireplace are made ofBurntech’s incredibly
strong blend of specialty cement and a lightweight aggregate.
The design of the fireplace calls for the installation of a refractory
fire brick liner. This should be a minimum of 1-1/8” thick. The
liner will be applied within the walls of the firebox. Modular fi
rebrick panels are also available from Burntech.
Additional Materials Required:
1) Ready-Mix concrete - 2 cu.ft.
SURFACE CRACKS - The Burntech FIREPLACES are
manufactured using high quality materials. During the drying
process, surface cracking may occur. These small cracks
(under 1/16” will not affect the fireplace safety or
performance). During the assembly process, fill surface
cracks with thin-set mortar and brush when drying for a
smooth surface finish.
Leveling and Aligning Components:
It is important to assemble all Vent-Free fireplace components
flush, level and square. Since it is not intended that mortar
be used to lay a mortar joint of any measurable thickness as
is typical when laying brick or concrete block, adjustments in
component height and level alignments are accomplished with
the use of small shims. These shims can be tapped into
place to level and align components. Once the Burntech
Mortar is set, the shims must be removed completely.
Be sure to re-grout any and all gaps where shims have been
inserted and then removed or where contact surfaces have
been separated by shim leveling.
Field Assembly Procedures
1) Mixing the BURNTECH mortar – You will require a 50 lb.
bucket of BURNTECH mortar which will be more than
enough to adequately affix all the fireplace components,
one to the next. The mortar is premixed and dry and is to
be used to adhere all the fireplace components. Be sure to
use clean water and work it up into a mixture that is pasty
but not lumpy. If it is too thin, the components will not
adhere. Some trial and error may be necessary. You will
want to apply the mixture with a standard grout bag.
2) Moisten all surfaces which will have grout applied prior
to assembly. This will minimize shrinkage and cracks
developing in the joint areas. Best way to accomplish this is
with a bucket of water and a large sponge. Dip sponge into
water and apply a liberal amount of water to the grout joint
surface several minutes before the part is to be assembled.
The water will absorb into the surface allowing the grout to
properly cure.
3) Assembly of the Components – Once you have found the
proper consistency of the mixture, load it into the grout bag
and then place the components together applying the mixture
directly to the components where they come together. As a
rule, you can figure that you should lay down about ½” (one-
half inch) of a thread of mortar. The line of mortar should be
approximately ½” (one-half inch) away from all the edges of
each separate component.
The mortar has a considerable amount of holding power so
do not overload the components with too much mortar.
4) You will notice that some mortar will “ooze out” when you
place the next component on top of or next to the component
you previously place. This is to be expected – it means the
two pieces have properly bonded -- and you will want to
swipe the excess away with a trowel. It is never intended
that the surfaces of the Burntech components are to be
completely covered with mortar.
5) Do not apply the mortar in thick bands even if the component
you are working with is larger than the rest. You will want to
apply “stripes” of mortar in these situations.
6) Making Sure Components Are Level – It is extremely
important that you pay careful attention to how you are
assembling the Burntech. Since every component builds on
the next, it is critical, that from the beginning, you are
checking that the components are fitting together to be
level and flush. If you have to make any kind of an
adjustment, do not try to do it “by loading an opening” with
mortar. That is completely unacceptable, resulting in a fi
replace that will not be plumb or level. What you are
advised to do is make use of shims. You will find these
supplied with the Burntech and you can nudge them in
between openings to achieve the precision you need in
making component adjustments.
7) Once you have removed the shims, you will want to cover
any gaps that may have resulted with the grout.
Warning: All surfaces where grout is applied must
have water sponged on several minutes prior to
assembly. This will minimize cracking of grout joint
and provide maximum strength.

13
Fireplace Assembly Procedures
Fireplace Assembly Procedures
Note - Wipe excess water from surface prior to applying grout.
This will help grout to adhere to surface during assembly.
Warning: All surfaces where grout is applied must have water
sponged on several minutes prior to assembly. This will minimize
cracking of grout joint and provide maximum strength.
Place the Burntech Fireplace hearth base on top of your non-
combustible floor. For concrete slabs, supporting floor needs to
be rated at ASTM 90.
Draw an outline of the hearth area based on the dimensions
shown in Figure 17. Position Hearth slabs and mark rebar
center locations. Drill 4 inches into concrete slab and secure
the 8 pieces of 12 inch rebar with epoxy.
Figure 17 Left Side Hearth 2nd
Right Side Hearth 1st
Model W
MFP-39 43”
MFP-44 48”
MFP-49 53”
W
28”
Apply mortar
between joints
12 inch rebar
Mix a batch of mortar and prepare Right Side Hearth bottom
surface to be bonded as shown in Figure 18.
Figure 18
1/2” AWAY
FROM EDGES
1/2” MORTAR
BEAD TYPICAL
Hearth section shown prepared
for Right Side position
APPLY MORTAR
BEAD TO ALL
MATING SURFACES
Align Right Side Hearth to the outline created. The overall
width should allow for an approximate gap of 1/8” between
slabs for the additional mortar to unite the remaining slab.
Check for surface flatness, level if necessary.
Apply mortar to the remaining Hearth except this time apply
beading on surface to be facing floor as shown in Figure
19.
1)
2)
3)
4)
Figure 19 Hearth shown prepared
for Left Side position
Before installing side walls, confirm placement of outside
combustion air access (if required), this can be installed
either side depending on which side is accessible to outside
combustion air (all diagrams in this manual show the
combustion air inlet hole on the right side). Prepare side
wall and rear wall mating surfaces with the prepared mortar
and begin assembly.
Figure 20
Side Wall shown prepared for Right Side Air
Access. For Left Side bead opposite side.
1/2” AWAY
FROM EDGES
Keep the assembly of the next sections of the firebox side
walls moving up, keeping components moist, mixing mortar
as you need it and threading the mortar appropriately as
you stack each section, one onto the next. Constantly check
for squareness and levelness while building each course of
block. As you complete each section, make certain that you
adhere the mortar at each and every joint.
Figure 21
Combustion Air Access
Right or Left (Right shown).
Apply
mortar
Apply mortar
Side Wall
Rear Wall
Side Wall
When you have arranged all the components into place
and you are working on the top rear firebox, check that
your work is level. If you need to, you can make some
adjustments in the top surface of the box assembly
simply by using shims. Once you are satisfied with the
degree of levelness, you can address any gap that may
have occurred with an appropriate amount of mortar.
5)
6)
7)

14
Although you are cautioned to use Burntech mortar
sparingly because it does have such holding power, you
should look over the firebox assembly at the end and fill
any gaps with mortar especially at joint connections.
Adjustments must be made to ensure the fireplace is level
and square while the mortar is still wet.
After fourth row of walls are in place, add 36” rebar to all
cells as shown in Figure 22. The rebar should enter the
holes in the Hearth and lie adjacent to the 12” rebar secured
in subfloor. Then fill cells with approx. 2 cu.ft. Ready-Mix
Concrete.
Figure 22
12 inch
rebar
Add rebar after
fourth row
Temporarily place Lintel between side walls, making sure
it is flush to the front and snug at the inside. Check for
alignment. Remove Lintel and apply mortar on surfaces to
be mated. Install Lintel.
Install Lower Rear Dome flush to the rear walls as shown in
Figure 23.
Figure 23
Lintel
Lower
Rear Dome
8)
9)
10)
Place Lower Side Domes between Lintel and Lower Rear
Dome to verify fit. The face with the rating plate faces the
inside of the firebox as shown in Figure 24. Remove and
prepare mating surfaces with mortar. Assemble Lower
Dome Sides and check that all four top surfaces are level
with each other. Shim if necessary.
Figure 24 Lower Dome Sides
(Rating Plate faces inside)
13) Now install the Smoke Dome Tops. Align outer edges with
Lower Dome Sides. Check for flatness and squareness.
Figure 25
11)

15
Raised and Flush Hearth Application:
If you would prefer to have a raised hearth, the Vent-Free box
can be raised to the desired height using wood studs or concrete
blocks.
Figure 26
Concrete Block
Raised Platform
When determining raised hearth height, be sure to allow
for the 3” thick firebox hearth and 1-1/2” thick firebrick floor, in
addition to the height of base platform.
Figure 27
Raised Wood
Platform
For a “flush hearth” (fireplace floor flush with the room’s
floor) the base plate can be omitted from the assembly and the
firebox walls built directly on the concrete support slab. The
fire brick floor of the firebox is then set directly to the concrete
support slab. This makes the fireplace finished fire brick floor
approximately one and one-half inches (1-1/2”) above the top
of the concrete support slab.
Gas Piping Installation
Gas Piping Installation
The provision for installation of a gas pipe is only for
connection to a Vent free decorative gas log sets meeting
standard ANSI Z21.11.2
Familiarize yourself with requirements for installation as
outlined by the National Fuel Gas Code, ANSI Z223.1.
This gas pipe provision must only be connected to an
approved vent-free gas log heater certified to ANSI Z21.11.2
heater standard. Check local building codes for specific pipe
and material requirements.
1) Gas piping can be routed from the floor, rear or side walls.
With a masonry drill, follow the instructions from the gas
appliance manufacturer. Any wires must be routed through
separate conduit. Make sure provisions are made for access
to manual shut-off valve.
Figure 28 CSA Certified Manual
Shut-off Valve
Tee-joint
Sediment
Trap
Approved
Flexible
Gas Line 3”
Minimum
Pipe
Nipple
Cap
From External
Regulator
(11-14” W.C. pressure)
2) After routing piping, fill hole around pipe with BURNTECH
mortar.
Electrical Line Feed
Electrical Line Feed
Electrical line feed can be routed through the Standard
firebox back wall, side walls or floor by drilling an appropriately
sized hole using a masonry drill bit. Be sure to follow the
Vent free decorative gas log Manufacturer’s explicit electrical
line connection instructions for vented masonry fireplace
installations.
NOTE: Gas line and electric line must be routed through
separate access holes.
Firebrick SideGas or
Electric Line
Figure 29
IMPORTANT: All access holes must be grouted with mortar to
seal any gaps or cracks.

16
Firebrick Liner Installation
Firebrick Liner Installation
It is required that the interior sides, rear and bottom be lined
with minimum 1-1/8” thick firebrick. Burntech Pre-fabricated
firebrick liner walls can make the installation easier.
All required through-wall accesses (gas and electrical
line feeds and combustion air supply access holes) should be
drilled before the required fire brick lining is installed.
Modular Firebrick Lining
If using our Burntech Firebrick Liners, simply use an extra
bucket of mortar. Install Hearth Liner first, rear next and sides
last. Consider if brackets for grates will be required, also if pre-
drilling is required for gas lines, electrical or if the outside
combustion air kit is to be installed.
The following Firebrick Patterns are available from Burntech:
OFS/TFS(XX)SHBL- Herring Bone
Figure 30
OFS/TFS(XX)FRBL- Running Bond
Figure 31
Initial Fireplace Operation
Initial Fireplace Operation
Follow the gas appliance manufacturers’ requirements
for lighting and operating your vent free log. When first operating
the fireplace, open a window in the room to allow smells created
from the heater and fireplace curing.
We suggest operating the heater for several 30 minute
intervals allowing the fireplace to cool for an hour in between.
This will allow any moisture in the brick and fireplace to
escape.
Keep in mind that it may require several operations
to completely remove any smell from the operation of a vent-
free heater and fireplace. If this condition continues, contact
your gas appliance dealer to inspect the gas heater for proper
operation.

17
Appendix I
For installations regulated by the International Residential Code, the support foundation for the fireplace installed on concrete shall consist of a minimum of 6 inches thick reinforced concrete slab. The minimum specified compressive strength of
f’c,shallbeas
required in Table R402.2 of the International Residential Code (IRC). Concrete subject to moderate or severe weathering as indicated in Figure R301.2(3) of the International Residential Code (IRC) shall be air entrained as specified in Table R402.2 of the International Residential Code (IRC). The maximum weight of fly ash, other pozzolans, silica fume, slag or blended cements that is included in concrete mixtures for garage floor slabs and for exterior porches, carport slabs and steps that will be exposed to deicing chemicals shall not exceed the percentages of the total weight of cementitious materials specified in Section 4.2.3 of ACI 318. Materials
used to
produce concrete and testing thereof shall comply with the applicable standards listed in Chapter 3 of ACI 318. For installations regulated by the International Building Code (IBC), the support foundation for the fireplace installed on concrete shall consist of a minimum of 6 inches thick reinforced concrete slab. The concrete strength and durability shall comply with Sections 1903, 1904 and 1905 of the International Building Code (IBC).
TABLE R402.2 MINIMUM SPECIFIED COMPRESSIVE STRENGTH OF CONCRETE
MINIMUM SPECIFIED COMPRESSIVE STRENGTHa(f’c)
Weathering Potentialb
TYPE OR LOCATION OF CONCRETE CONSTRUCTION Negligible Moderate Severe
Basement walls, foundations and other concrete not exposed to the weather 2,500 2,500 2,500c
Basement slabs and interior slabs on grade, except garage floor slabs 2,500 2,500 2,500c
Basement walls, foundation walls, exterior walls and other vertical concrete work exposed to the weather
2,500 3,000d3,000d
Porches, carport slabs and steps exposed to the weather, and garage floor slabs 2,500 3,000d,e,f 3,500d,e,f
a. Strength at 28 days psi. b. See Figure R301.2(3) for weathering potential. c. Concrete in these locations that may be subject to freezing and thawing during construction shall be air-entrained concrete in
accordance with Footnote d.
d. Concrete shall be air-entrained. Total air content (percent by volume of concrete) shall be not less than 5 percent or more than
7 percent.
e. See Section R402.2 for maximum cementitious materials content. f. For garage floors with a steel troweled finish, reduction of the total air content (percent by volume of concrete) to not less than
3 percent is permitted if the specified compressive strength of the concrete is increased to not less than 4,000 psi.

18
Appendix II
FIGURE R301.2(3) WEATHERING PROBABILITY MAP FOR CONCRETE
a. Alaska and Hawaii are classified as severe and negligible, respectively. b. Lines defining areas are approximate only. Local conditions may be more or less severe than indicated by region classification. A
severe classification is where weather conditions result in significant snowfall combined with extended periods during which there is little or no natural thawing causing deicing salts to be used extensively.

Lifetime LimitedWarranty
Burntech® Fireplace Solutions
Burntech® Fireplace Solutions, Inc. warrants all Burntech® Fireplaces to be free from defects in materials that adversely affect replace
performance for the lifetime of the product from the date of purchase, subject to the terms and conditions of this limited warranty. Burntech®
Fireplace Solutions does not warrant accessory chimney, outside air ducts and devices not manufactured by Burntech® Fireplace Solutions.
This warranty covers only products manufactured by Burntech® Fireplace Solutions, specically the modular masonry replace, and
NO WARRANTY, EXPRESS OR IMPLIED, EXTENDS TO ANY OF THE HARDWARE, FOUNDATION, VENTING, DUCTS,
OR ACCESSORIES. THIS WARRANTY DOES NOT COVER DRAFTING, SMOKING, OR SOOTING OF THE FIREPLACE
SYSTEM. Factors beyond the manufacturer’s control affect drafting, smoking, and sooting and Burntech® Fireplace Solutions cannot
guarantee these aspects of performance.
Coverage under this warranty is subject to the following conditions and exclusions:
This warranty is null and void when the replaces are not installed pursuant to the installation instructions provided by Burntech®
Fireplace Solutions or local building codes have not been followed completely.
Glass is warranted against thermal breakage only and only on models that are manufactured by Burntech® Fireplace Solutions with a glass
front. On Direct Vent models the safety glass or safety screen must be kept in front of this glass when replace is in use.
Safety screen must be used on all models when in use.
This warranty does not apply to any component or part that shows evidence of misuse, abuse, improper installation, accident or lack of
regular maintenance. Burntech® Fireplace Solutions is not responsible for misuse or mishandling of component parts.
This warranty does not apply to any damage sustained to the appliance while in transit.
Neither Burntech® Fireplace Solutions, nor any afliate thereof, is responsible for any labor costs or indirect costs incurred for the
replacement of defective components. Any covered component that, in our judgment, is defective shall be repaired, replaced or refunded
at Burntech® Fireplace Solutions’s option.
Nothing in this warranty makes Burntech® Fireplace Solutions, or any afliate thereof, liable in any respect for any injury or damage to
the building or structure in which the replace has been installed or to the persons or property therein arising out of the use, misuse, or
installation of properly manufactured Burntech® Fireplace Solutions products.
The replace must be used in accordance with operating instructions. The grate or andirons must be installed when using the replace.
NEITHER Burntech® Fireplace Solutions, NOR ANY AFFILIATE THEREOF, SHALL BE HELD LIABLE FOR ANY INCIDENTAL OR
CONSEQUENTIAL DAMAGES OR EXPENSES ARISING OUT OF THE USE OF THE FIREPLACE. ALL SUCH DAMAGES AND
EXPENSES ARE HEREBY EXCLUDED. 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.
If a component is found to be defective under the terms of this warranty the party this warranty is extended shall, notify Burntech® Fireplace
Solutions, 6520 Platt Ave #577, West Hills, CA 91307 in writing, by registered mail, within thirty (30) days following the discovery of the
defect within the lifetime warranty period. The letter shall include proof of purchase and state the (1) date of purchase, model number and
serial number ; (2) place of purchase; (3) address of installation; (4) name, address and phone number of the homeowner; and (5) a brief
description of the defect.
This warranty applies only to those replaces installed in the continental United States, Alaska and Canada. If any part of this warranty is
found to be unenforceable, the remaining parts shall remain in force and effect.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES, TERMS OR CONDITIONS,
EXPRESS OR IMPLIED EITHER IN FACT OR BY OPERATION OF LAW. Burntech® Fireplace Solutions HEREBY DISCLAIMS ALL
GUARANTEES AND WARRANTIES, EXPRESS OR IMPLIED, BEYOND THE WARRANTIES SET FORTH HEREIN, INCLUDING
BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not
allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
Burntech® Fireplace Solutions
6520 Platt Ave #577, West Hills, CA 91307
Main: [phone], Fax: [phone]
Revised 12/05/2012 WWW.BURNTECH.COM
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