Amana 10759833 Installation Instructions Manual
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1212
Furnace
Water
Heater
Opening
Chimney or Gas Vent
NOTE: The single opening must have
a free area of not less than one
square inch per 3000 BTU of
the total input rating of all equip-
ment in the enclosure, but not less than
the sum of the areas of all vent
connectors in the confined space.
Alternate
Opening
Location
Equipment Located in Confined Spaces; All Air
from Outdoors - Single Air Opening. See 5.3.3-b.
5. When directly communicating with the outdoors, the single
opening shall have a minimum free area of 1 square inch per
3,000 BTU per hour of total input rating of all equipment in
the enclosure.
Combustion and Ventilation Air Requirements
5.3.4 Specially Engineered Installations:
The requirements of 5.3.3 shall not necessarily govern when special
engineering, approved by the authority having jurisdiction, pro-
vides an adequate supply of air for combustion, ventilation, and
dilution of flue gases.
5.3.5 Louvers and Grilles:
In calculating free area in 5.3.3, consideration shall be given to the
blocking effect of louvers, grilles or screens protecting openings.
Screens used shall not be smaller than 1/4 inch mesh. If the area
through a design of louver or grille is known, it should be used in
calculating the size of opening required to provide the free area
specified. If the design and free area is not known, it may be
assumed that wood louvers will have 20-25 percent free area and
metal louvers and grilles will have 60-75 percent free area. Louvers
and grilles shall be fixed in the open position or interlocked with the
equipment so that they are opened automatically during equipment
operation.
5.3.6 Special Conditions Created by Mechanical Exhausting or
Fireplaces:
Operation of exhaust fans, ventilation systems, clothes dryers, or
fireplaces may create conditions requiring special attention to avoid
unsatisfactory operation of installed gas utilization equipment. Air
from Inside Building. See 5.3.3-a.