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Caution – Burnham ALP150 User Manual

Page 17

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1

a. Size roof opening to maintain minimum

clearance of 1 inch from combustible materials.

b. Extend vent pipe to maintain minimum vertical

and horizontal distance of twelve (12) inches
from roof surface. Allow additional vertical
distance for expected snow accumulation.
Provide brace as required.

CaUTiOn

Vertical venting requires the use of roof flashing
and a storm collar to prevent moisture from
entering the structure.

c. Install storm collar on vent pipe immediately

above flashing. Apply Dow Corning Silastic 732
RTV Sealant between vent pipe and storm collar
to provide weather-tight seal.

6. Install Rodent Screen and Vent Terminal (supplied

with boiler), see Figure 8 for appropriate

configuration.

Figure 8: Rodent Screen installation

Figure 9: Direct Vent - Vertical Terminations

Figure 10: Direct Vent - Vertical Terminations with Sloped Roof

Extend vent/combustion air piping to maintain minimum vertical (‘X’) and minimum horizontal (‘Y’) distance of
twelve (12) inches (18 inches Canada) from roof surface. allow additional vertical (‘X’) distance for expected
snow accumulation.

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