VANGUARD
UNVENTED
PRODUCT
FEATURES
Operation
This firebox is designed for use with ap- proved ANSI Z21.11.2 decorative type unvented room heaters. (Physical size limi- tations apply. Refer to minimum firebox requirements supplied with log heater.) It requires no outside venting or chimney mak- ing installation easy and inexpensive. When used without the blower (models FB36CA or FB42C only), the firebox requires no electricity making it ideal for emergency
Blower Accessory
The FB36CA or FB42C fireboxes will ac- cept the GA3700 accessory. The variable blower allows you to select the fan speed you desire. The blower circulates heated air from the firebox into the room. Use of blower is optional.
Brick Liner
This firebox features a revolutionary light- weight concrete brick liner. As with all concrete liners, this liner may develop slight cracks when exposed to heat. These cracks will not affect the performance of the fire- place or
LOCATING
FIREBOX
Planning
Plan where you will install the firebox. This will save time and money later when you install the firebox. Before installation, con- sider the following:
1.Where the firebox will be located. Al- low for wall and ceiling clearances (see Installation Clearances, page 7).
2.Everything needed to complete instal- lation.
3.These models CANNOT be installed in a bedroom or bathroom.
4.Proper air for combustion and ventila- tion (see below).
AIR FOR COMBUSTION AND VENTILATION
WARNING: This firebox shall not be installed in a confined space unless provisions are pro- vided for adequate combustion and ventilation air. Read the fol- lowing instructions to insure proper fresh air for this and other
Today’s homes are built more energy effi- cient than ever. New materials, increased insulation, and new construction methods help reduce heat loss in homes. Home own- ers weather strip and caulk around windows and doors to keep the cold air out and the warm air in. During heating months, home owners want their homes as airtight as pos- sible.
While it is good to make your home energy efficient, your home needs to breathe. Fresh air must enter your home. All
Exhaust fans, fireboxes, clothes dryers, and fuel burning appliances draw air from the house to operate. You must provide ad- equate fresh air for these appliances. This will insure proper venting of vented fuel- burning appliances.
PROVIDING ADEQUATE VENTILATION
The following is exerpts from 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 Contruction;
2.Unconfined Space;
3.Confined Space.
The information on pages 4 through 6 will help you classify your space and provide adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and win- dows may provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight construction, you must provide additional fresh air.
Unusually tight construction is de- fined as construction where:
a.walls and ceilings exposed to the outside atmosphere have a con- tinuous water vapor retarder with a rating of one perm (6 x
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, be- tween sole plates and floors, be- tween
If your home meets all of the three criteria above, you must provide ad- ditional fresh air. See Ventilation Air From Outdoors, page 6.
If your home does not meet all of the three criteria above, proceed to page 5.
Confined and Unconfined Space
The National Fuel Gas Code (ANSIZ223.1, 1992 Section 5.3) defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are in- stalled*, through openings not furnished with doors, are considered a part of the unconfined space.
*Adjoining rooms are communicating only if there are doorless passageways or ventila- tion grills between them.
Continued
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