Fresh Air For Combustion And Ventilation - Procom PCD18T User Manual

QUALIFIED INSTALLING AGENCY
Installation and replacement of gas piping, gas utilization equipment or accessories and repair and servicing of
equipment shall be performed only by a qualified agency. The term "qualified agency" means any individual, firm,
corporation, or company that either in person or through a representative is engaged in and is responsible for:
a) The installation, testing, or replacements of gas piping or
b) The connection, installation, testing, repair, or servicing of equipment; that is experienced in such work; that
is familiar with all precautions required; and that has complied with all the requirement of the authority hav-
ing jurisdiction.
In areas that prohibit the use of vent-free heaters, the log set has been tested and approved to the ANSI Z.60
standard for Vented Decorative Logs. When used as a vented log set refer to additional instructions on page .

FRESH AIR FOR COMBUSTION AND VENTILATION

WARNING: This heater shall not be installed in a confined space or unusually tight construction unless pro-
visions are provided for adequate combustion and ventilation air. Read the following instructions to insure
proper fresh air for this and other fuel-burning appliances in your home.
Today's homes are built more energy efficient than ever. New materials, increased insulation, and new construc-
tion methods help reduce heat loss in homes. Homeowners weather strip and caulk around windows and doors
to keep the cold air out and the warm air in. During heating months, homeowners want their homes as airtight
as possible. While it is good to make your home energy efficient, your home needs to breathe. Fresh air must
enter your home. All fuel-burning appliances need fresh air for proper combustion and ventilation. 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.
PRODUCING ADEQUATE VENTILATION
The following are excerpts from National Fuel Gas Code. NFPA 54/ANS Z223.1. Air for Combustion and Ventila-
tion. All spaces in homes fall into one of the three following ventilation classifications:
. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 5 through 7 will help you classify your space and provide adequate ventilation.
Confined and Unconfined Space
The National Fuel Gas Code ANSI Z223.1 defines a confined space as a space whose volume is less than 50
cubic feet per ,000 Btu per hour (4.8 cubic meter per kilowatt) of the aggregate input rating of all appliances in-
stalled 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 cubic meter per kilowatt) of the aggregate input rating of all appliances installed in that space.
Rooms connecting directly with the space in which the appliances are installed*, through openings not furnished
with doors, are considered a part of the unconfined space.
This heater shall not be installed in a confined space or unusually tight construction unless provisions are
provided for adequate combustion and ventilation air.
*Adjoining rooms are connecting only if there are doorless passageways or ventilation grills between them.
Unusually Tight Construction
The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation. How-
ever, in buildings 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
5