Technical data

Installation, Operation, And Service Instructions 15
(b) All Air From Outdoors:
The confined space shall be provided with two permanent openings,
one within 12 inches of the top and another within 12 inches of the
bottom of the enclosure. The openings shall communicate directly, or
by ducts, with the outdoors or crawl or attic spaces which
communicate freely with the outdoors.
Direct To Outdoors, See Figure 8.
Figure 8.
With Vertical Ducts See Figure 9.
Figure 9.
Note: The inlet
and outlet air
openings shall
each have a
free area of
not less than
one square
inch per 4,000
Btu per hour of
total input
rating of all
equipment in
the enclosure.
Ventallation Louvers
(each end of attic)
Chimney
Inlet Air
Outlet Air
Ventallation Louvers for Unheated Crawl Space
A
lternative
Air Inlet
Note: The inlet
and outlet shall
each have a free
area of not less
than one square
inch per 4,000
Btu per hour of
the total input
rating of all
equipment in the
enclosure.
Ventallation Louvers
(each end of attic)
Chimney
Outlet Air
Inlet Air Duct
(ends 1 ft. above floor)