Rheem 97MDV060 Series Installation Instructions Manual page 31

GENERAL VENTING REQUIREMENTS AND
NON-DIRECT VENT (cont.)
FIGURE 12
NON-DIRECT VENT AIR FROM
ATTIC OR CRAWL SPACE
ST-A1194-19
FIG D
of the enclosure, shall be permitted where the equipment
has clearances of at least 1 inch from the sides and back
and 6 inches from the front of the appliance. The opening
shall directly communicate with the outdoors or communi-
cate through a vertical or horizontal duct to the outdoors or
FIGURE 14
COMBUSTION AIR FITTING
GUIDELINES
FIGURE 13
NON-DIRECT VENT
OUTSIDE AIR USING A
HORIZONTAL DUCT
spaces (crawl or attic) that freely communicate with the out-
doors, and shall have a minimum of:
A. 1 Square inch for each 3,000 BTUH of the total input rat-
ing of all equipment located in the enclosure
and
ST-A1194-82-00
OUTLET AIR 1 SQ. IN.
(6.5 SQ. CM.) PER 2000 BTUH
INLET AIR 1 SQ. IN.
(6.5 SQ. CM.) PER 2000 BTUH
ST-A1194-19
FIG E
31