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intakes, etc.
4. The exhaust vent opening must be a minimum of:
* 12 inches (0.3m) from the ground
* 24 inches (0.61m) from any combustible surface i.e. fence, plant, etc.
* 7 feet (2.1 m) from any public walkway
5. The exhaust air is EXTREMELY HOT. Caution must be taken to avoid
contact with children, people, plants, animals, or any other object that
may be affected by heat. It is recommended to use a vertical pipe to
discharge the hot air at a safe elevation.
6. Vertical installations must have an approved vertical vent cap and
horizontal installations must have an approved horizontal vent cap.
Areas where severe wind conditions exist and vent caps are exposed to
unprotected open areas additional protection (especially in horizontal
installations) must be provided.
6.3 Combustion Air Intake Requirements
There are 2 methods of supplying the heater with combustion air. They are as follows:
1. Room Air: Conventional homes may use room air for combustion. Where
room air is used, the exhaust pipe must incorporates a minimum 3’
vertical section immediately adjoining the heater. It is highly recom-
mended that the total exhaust vertical rise be longer than the total
horizontal run and that the majority of the vertical rise be as close to the
heater as possible..
2. Outside Air: All installations can be connected to the exterior of the
building using a noncombustible metal pipe, with a minimum 2 inch
(50mm) internal diameter or by using APR Part No: AK100 (Air Intake
Kit). A larger diameter air intake pipe may be required if the length of
intake exceeds 3’ (1 meter) or has several bends. Use of plastic pipes are
not permitted.
In some installations, outdoor combustion air may be needed to ensure proper perfor-
mance. If your heater burns poorly, experiences roll-out or back-drafts, outside combus-
tion air may be required.
The following restrictions apply to any and all installations:
1. Use of plastic pipes is not permitted under any circumstance.
2. The combustion air intake must terminate into a vented space, i.e. outside,
vented attic, vented crawl space. This heater cannot draw air from a
closed space such as a closed garage, airtight crawl space or any other
sealed room.
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