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113110-01H
6
ASSEMBLy
Continued
Figure 3 - Assembling Hood
Hood Tab
Sheet Metal
Screws
Louver
Baffle
Firebox Top
Hood
Hood Tabs
AIR FOR COMBUSTION AND VENTILATION
WARNING: This heater shall
not be installed in a room or
space unless the required vol
-
ume of indoor combustion air
is provided by the method de
-
scribed in the
National Fuel Gas
Code, ANSI Z223.1/NFPA 54,
the
International Fuel Gas Code,
or
applicable local codes. 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 insula
-
tion, and new construction methods help
reduce heat loss in homes. Home owners
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 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 ap-
pliances 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.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from
National Fuel
Gas Code, ANSI Z223.1/NFPA 54, 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 information on pages 6 through 8 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 buildings of un
-
usually tight construction, you must provide
additional fresh air.
Unusually tight construction is defined as
construction where:
a. walls and ceilings exposed to the out
-
side atmosphere have a continuous
water vapor retarder with a rating of one
perm (6 x 10
-11
kg per pa-sec-m
2
) or less
with openings gasketed or sealed
and
b. weather stripping has been added on
openable windows and doors
and
7. Gently rotate hood to upright position.
Make sure hood tabs are behind louvers
and hood is resting on firebox top (see
Figure 3,).
8. Align screw holes on hood with screw
holes on firebox top.
9. Insert screws as shown in Figure 3, page
6. Tighten screws firmly.
