Goodman Amana AMH8 Service Instructions Manual page 23

PRODUCT DESIGN
(3) For purposes of this calculation, an infiltration rate greater than 0.60
ACH shall not be used in the equations in 9.3.2.2(1) and 9.3.2.2(2).
9.3.2.3 Indoor Opening Size and Location. Openings used to connect
indoor spaces shall be sized and located in accordance with the following:
(1)* Combining spaces on the same story. Each opening shall have a
minimum free area of 1 in.
input rating of all appliances in the space but not less than 100 in.
2
(0.60m ). One opening shall commence within 12 in. (300 mm) of the
top, and one opening shall commence within 12 in. (300 mm) of the
bottom, of the enclosure [see Figure A.9.3.2.3(1)]. The minimum
dimension of air openings shall be not less than 3 in. (80 mm).
NOTE: Each opening must have
a free area of not less than one
square inch per 1000 BTU of
the total input rating of all equip-
ment in the enclosure, but not
less than 100 square inches.
Figure A.9.2.3.3.(1) All Combustion Air from Adjacent
Indoor Spaces through Indoor Combustion Air Openings.
(2) Combining spaces in different stories. The volumes of spaces in
different stories shall be considered as communicating spaces where
such spaces are connected by one or more openings in doors or floors
having a total minimum free area of 2 in.
kW) of total input rating of all appliances.
9.3.3 Outdoor Combustion Air. Outdoor combustion air shall be pro-
vided through opening(s) to the outdoors in accordance with the methods
in 9.3.3.1 or 9.3.3.2. The minimum dimension of air openings shall not be
less than 3 in. (80 mm).
9.3.3.1 Two Permanent Openings Method. Two permanent open-
ings, one commencing within 12 in. (300 mm) of the top and one com-
mencing within 12 in. (300 mm) of the bottom, of the enclosure shall be
provided. The openings shall communicate directly, or by ducts, with the
outdoors or spaces that freely communicate with the outdoors, as follows:
(1)* Where directly communicating with the outdoors or where communi-
cating to the outdoors through vertical ducts, each opening shall have
a minimum free area of 1 in.
input rating of all appliances in the enclosure. [See Figure
A.9.3.3.1(1)(a) and Figure A.9.3.3.1(1)(b).]
2 /1000Btu/hr (2200 mm 2 /kW) of the total
Chimney or Gas Vent
Water
Heater
Furnace
2 /1000 Btu/hr (4400 mm
2 2
/4000 Btu/hr (550 min /kW) of total
Chimney or Gas Vent
2
Furnace
Alternate
air inlet
Figure A.9.3.3.1(1)(a) All Combustion Air From Outdoors -
Inlet Air from Ventilated Crawl Space and Outlet Air
Opening
Chimney or Gas Vent
Opening
Furnace
2 /
Figure A.9.3.3.1(1)(b) All Combustion Air
From Outdoors through Ventilated Attic.
(2)* Where communicating with the outdoors through horizontal ducts,
each opening shall have a minimum free area of 1 in.
2
(1100 min /kW) of total input rating of all appliances in the enclo-
sure. [See Figure A.9.3.3.1(2).]
Chimney or Gas Vent
Furnace
Figure A.9.3.3.1(2) All Combustion Air From Outdoors
Ventilation louvers
(each end of attic)
NOTE: The inlet and outlet air
openings must each have a free
area of not less than one square
inch per 4000 BTU of the
total input rating of all equipment
in the enclosure.
Outlet Air
Water
Heater
Inlet Air
Ventilation louvers for
unheated crawl space
to Ventilated Attic.
Ventilation louvers
(each end of attic)
NOTE: The inlet and outlet air
openings must each have a free
area of not less than one square
inch per 4000 BTU of the
total input rating of all equipment
in the enclosure.
Outlet Air
Water
Heater
Inlet air duct
[ends 1 ft (300 mm)
above floor]
NOTE: The air duct openings
must have a free area of not
less than one square inch per
2000 BTU of the total input
rating of all equipment in the
enclosure*.
Outlet air duct
Water
Heater
Inlet air duct
through Horizontal Ducts.
2 /2000 Btu/hr
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