Goodman Mfg GDS8, GHS8, GMS8 Space, Unconfined, Equipment Located in Confined Spaces

Space, Unconfined.

For purposes of this Code, a space whose volume is not less than 50 cubic feet per 1,000 BTU per hour of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed through openings not furnished with doors, are considered a part of the unconfined space.

5.3.3 Equipment Located in Confined Spaces:

(a) All Air from Inside the Building: The confined space shall

be provided with two permanent openings communicating

directly with an additional room(s) of sufficient volume so

that the combined volume of all spaces meets the criteria

Alternate air inlet

Chimney or Gas Vent

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
Furnace		Inlet Air

Ventilation louvers for unheated crawl space

for an unconfined space. The total input of all gas utilization

equipment installed in the combined space shall be

considered in making this determination. Each opening

shall have a minimum free area of 1 square inch per 1,000

BTU per hour of the total input rating of all gas utilization

equipment in the confined space, but not less than 100

square inches. One opening shall be within 12 inches of

the top and one within 12 inches of the bottom of the

enclosure.

Chimney or Gas Vent

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.

Opening

Water

Furnace Heater

Opening

Equipment Located in Confined Spaces;

All Air from Inside Building. See 5.3.3-a.

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

2.When communicating with the outdoors through vertical 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.

Chimney or Gas Vent

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
Furnace		Inlet air duct
		[ends 1 ft (300 mm)
		above floor]

Equipment Located in Confined Spaces; All Air from Outdoors

Through Ventilated Attic. See 5.3.3-b.

3.When communicating with the outdoors through horizontal 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.

(b) All Air from Outdoors: The confined space shall be provided

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

communicate 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

Chimney or Gas Vent

Outlet air duct

Water

Furnace Heater

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*.

equipment in the enclosure.

Inlet air duct

*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.

IO-242C 9 05/05