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Rev. E 4-19-05 P/N 472089
17
INDOOR INSTALLATIONS
MINIMAX NT VENTING GUIDELINES
4'
7'
4'
4'
Force Air Inlet
Vent Hood
Walkway
3'
1' min.
1' min.
1' min.
above grade
Vent Hood
Vent Hood
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 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 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.
Vent termination for side wall installations:
must be the same diameter as the
vent connector.
must be suitable for use with category III
appliances with flue gas temperature ratings
less than 400 deg. F.
may use a single wall vent pipe with
permanently sealed seams, joints and
proper insulating materials.
Vent pipe extension:
Vent for roof penetration installations:
Recommended sources for
side wall Vent Hood;
see "Section Venting".
vent terminated at least 24"
above any object within 10 ft.
Vent Cap
Ridge
Chimney/Gas Vent
3 ft. min.
2 ft. min.
Roof
Jack
Roof
Thimble
More Than10 ft.
Figure 12.
Section III. Installation