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UHA UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL
10
Figure 5: Standard Vented Heater - Common Vertical Vent Termination
Roof
18" (46 cm)
Min.
Type "B" vent cap
(7" or 8") may be used.
(These are not available
from Roberts-Gordon.)
Roof
Flashing
Approved
Thimble
(If Applicable)
Type "B" Vent Pipe
4" (10 cm)
Single Wall Pipe
4" (10 cm)
Single Wall Pipe
"D" Area must equal sum
of open area of
individual vents.
"D"
Single Wall Pipe
The last section of vent pipe
passing through the roof or
wall may be Type "B" vent pipe.
All other vent materials in the
building must be single wall
vent pipe.
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