Amana GUCA045AX30 Service Instructions Manual page 20

COMBUSTION AND VENTILATION AIR
(DIRECT/NON-DIRECT VENT MODELS)
Equipment Located in Confined Spaces; All Air from
Inside Building. See 5.3.3-a
(b) All Air from Outdoors: The confined space shall be pro-
vided with two permanent openings, one commencing within
12 inches of the top and one commencing within 12 inches
of the bottom of the enclosure. The openings shall com-
municate directly, or by ducts, with the outdoors or spaces
(crawl or attic) that freely communicate with the outdoors.
1. When directly communicating with the outdoors, each
opening shall have a minimum free area of 1 square
inch per 4,000 BTU per hour of total input rating of all
equipment in the enclosure. The following drawing il-
lustrates the air opening specifications for equipment
located in confined spaces; all air from outdoors-inlet
air from ventilated crawl space and outlet air to venti-
lated attic.
Equipment Located in Confined Spaces; All Air from
Outdoors—Inlet Air from Ventilated Crawl Space and
Outlet Air to Ventilated Attic. See 5.3.3-b
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2. When communicating with the outdoors through verti-
cal ducts, each opening shall have a minimum free area
of 1 square inch per 4,000 BTU per hour of total input
rating of all equipment in the enclosure. The following
drawing illustrates the air opening specifications for
equipment located in confined spaces; all air from out-
doors through ventilated attic.
Equipment Located in Confined Spaces; All Air
from Outdoors Through Ventilated Attic. See
3. When communicating with the outdoors through hori-
zontal ducts, each opening shall have a minimum free
area of 1 square inch per 2,000 BTU per hour of total
input rating of all equipment in the enclosure. The fol-
lowing drawing illustrates the air opening specifications
for equipment located in confined spaces; all air from
outdoors.
*If the appliance room is located against an outside wall and the air openings communicate
directly with the outdoors, each opening shall have a free area of not less than one square inch
per 4,000 BTU per hour of the total input rating of all appliances in the enclosure.
Equipment Located in Confined Spaces; All Air from
Outdoors. See 5.3.3-b.
5.3.3-b.