Rev. B 1-22-04 P/N 472235
21
vent terminated at least 24"
above any object within 10 ft.
Vent Cap
Ridge
Chimney
3 ft. min.
2 ft. min.
Roof
Jack
10 ft.
INDOOR INSTALLATIONS
MINIMAX NT/TSI LOW NOx VENTING GUIDELINES
4'
7'
4'
Air Supply
Air SupplyAir Supply
Vent Hood
Walkway
3'
1' min.
1' min.
1' min.
above grade
Vent Hood
Vent Hood
E
H
D
F
G
G
F
B
C
A
must extend at least 3 ft. higher than the
point at which it passes through the roof,
or as permitted by local code.
must use a roof thimble or a double-wall
vent pipe through the roof penetration.
must terminate with an approved (listed)
roof jack, storm collar, and vent/weather cap.
must be not less than 7 ft. above public walkways.
must be at least 3 ft. above any outside air intake located within a 10 ft. radius.
must NOT be within 3 ft. of an inside corner of the structure.
must be at least 1 ft. above grade.
must be located at the following distances away from any door, window, or gravity air inlet:
4 ft. below
4 ft. horizontally
1 ft. above
Air Supply
Clearances indicated are for non-mechanical air supply inlet to the building.
For mechanical air supply inlet, a minimum horizontal clearance of 10 feet should
be maintained away from the vent termination.
B
A
D
E
F
J
K
L
C
G
Vent termination for side wall installations:
must be the same diameter as the
vent connector.
must be suitable for use with category III
appliances which have flue gas temperatures
of less than 400 deg. F.
must use a single wall vent pipe with
permanently sealed seams and joints.
Vent pipe extension:
Vent for roof penetration installations:
L
J
K
Recommended sources for
side wall Vent Hood; see page 15,
Section Venting.
4'
4'
1'
(See Table 2 on page 20 for Air Supply Requirements.)
Figure 16.
Installation (Indoor)
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