Kenmore 153.337002 r t, Ventilation, for Appliances, Combustion Air and, IFig-ro4

Installation Instructions (cont'd)

Facts to Consider About the	Combustion	Air and
Location (cont'd)	Ventilation	for Appliances

Located in Unconfined Spaces

®

Figure 2 ]	ROOM INSTALLATION
	(ACCEPTABLE)

A room is any enclosure which is at least 16" times

greater than the total volume of all the gas fired appli- ances within the enclosure.

Unconfined Space is 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

In unconfined spaces in buildings, infiltration may be adequate to provide air for combustion, ventilation and dilution of flue gases. However, in buildings of tight construction (for example, weather stripping, heavily insulated, caulked, vapor barrier, etc.), additional air may need to be provided using the methods described in Combustion Air and Ventilation for Appliances Located in Confined Spaces, b.

WATER

HEATER

I Figuro 3 I	ALCOVE INSTALLATION
	(ACCEPTABLE)

An alcove suitable for the installation of a water heater is a restricted section of a room not separated from the room

by a door or partition and which meets the minimum clearances for the specific model water heater listed below.

*When the ceiling height exceeds 8 feet, you are only allowed to consicTer8 _'eetwhen calculating the total vol- ume of the enclosure.

12" MAX.

-r_

t

VENTILATION

AIR

OPENINGS C

DOOR

FRONT VIEW	_	3"MIN.
OF DOOR		AIR DUCT

Combustion Air and

Ventilation for Appliances Located in Confined Spaces

Confined Space is a space whose volume is less than 50 cubic feet per 1,000 Btu per hour of the aggregate input rating of all app]iances installed in that space.

ao ALL AIR FROM INSIDE BUILDINGS:

(See Figures l through 6)

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 for an unconfined space. The total

input of all gas utilization equipment installed in the com- bined space shall be considered in making this determination. Each opening shall have a minimum free area of one 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 commence within

12 inches of the top and one commencing within 12 inches of the bottom of the enclosure.

SVENT

IFig-ro4]

[Flguro51

I AI _Z] I WA. ER _

OPENINGS

FURN

Figure

6 ]

AWARNING

b. ALL

AIR

FROM

OUTDOORS:

(see Figures 7 through

9,

Minimum

clearances

between the

water

heater

and

page

12)

combustible construction are listed below:

The confined space shall be provided with two permanent

Minimum

Side

& Rear

Clearances --

I"

openings, one commencing within 12 inches of me top and

Minimum

front

clearance from

jacket

to closet door

_ 4"

one commencing

within

12 inches from the

bottom

of

the

Minimum

ceiling clearance

from

jacket

top to

com-

enclosure.

The

openings

shall

communicate

directly,

or

by

bustible

ceiling-

18".

ducts,

with

the

outdoors

or spaces (crawl or attic) that

freely

communicate

with

the outdoors.

It