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3. The elevation of the combustion air intake must be below the exhaust
vent. An elbow may be used to lower the air intake point below that of
the exhaust vent.
4. Excessive lengths and elbows on the air intake pipe will cause airflow
restrictions. A minimum of 2” (50 mm) or larger venting should be used
for lengths exceeding 3’ (1 meter). Increase the venting size as needed.
7. Mobile Home Additional Installation Requirements
7.1 Typical Mobile Home Installation Configuration
The following figures describe some typical installations for mobile homes. Variations of
these are possible. Common sense, safety and compliance with local building codes must
be respected in any variation.
INSTALL ALL VENTING AT CLEARANCES
SPECIFIED BY THE VENT MANUFACTURER
Figure 12. Mobile home installation
through wall; interior rise
Figure 13. Mobile home installation through
wall; exterior rise
Figure 14. Mobile home installation
through roof
(although this installation is permitted, a 3’ (1 m) vertical rise
is strongly recommended)
Figure 15. Mobile home installation through
wall
ROOF
COMBUSTION AIR
INTAKE
TEE WITH
CLEANOUT
VERTICAL RISE
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