CleaverBrooks ClearFire CFH, Operation, Service And Parts Manual, Page: 32 / 120

Chapter 3 — Flue and Combustion Air Venting
3-4 Part No. 750-295
6. Less than 1 ft. (300mm) above grade level.
7. Within 3 ft. (1m) of a window or door which can be opened in any building, any non-mechanical air
supply inlet to any building to the combustion air inlet of any other appliance.
8. Underneath a veranda, porch or deck, unless:
A. The veranda, porch or deck is fully open on a minimum of two sides beneath the floor.
B. the distance between the top of the vent termination and the underside of the verandah, porch or
deck is greater than 1 ft. (30cm)
Note: For direct vent installations where the air is piped in from outside, a protective screen on the air inlet
termination elbow must be used to act as an inlet screen.
3.3.1 Venting Installation Tips
Support piping:
• horizontal runs - at least every five (5) feet
• vertical runs - use braces under or near elbows
! Caution
To avoid personal injury or property damage:
• To cut nonmetallic vent pipe, use a fine-toothed hacksaw (34 teeth per inch).
• Do not use cracked or damaged vent pipe or fittings.
• Do not use nonmetallic vent fittings if they are cut or altered.
• Do not drill holes, or use screws or rivets, in nonmetallic vent pipe or fittings.
Figure 3-1 Vent terminations
! Warning
Examine the venting system at least once a year. Check all
joints and vent pipe connections for tightness, corrosion or
deterioration.