Combustion Air Supply - Room Air - Brant Radiant Heaters DES3-20-50 Owner's Manual

3.0 Installation • Combustion Air Requirements
Figure 3.25 •
Outside Combustion Air Vertical Intake - Side View
(If X if less than 10 ft.)
Combustion Air
Intake Cap
Cleanout Tee
Combustion Air Sidewall Intake - Side View
Figure 3.26 •
Outside
Combustion Air
Intake Cap
Vent Termination
Support Brackets

Combustion Air Supply - Room Air

Combustion air may be supplied to the heater by indoor or outdoor means.
If using combustion air from indoors, the required volume of the space must be a minimum of 50 ft
1000 Btu/hr unless the building is of unusually tight construction. If the building is of unusually tight
construction with air infiltration rates of less than 0.40 air changes per hour, outside combustion air is
typically needed unless the sheer size of the building allows otherwise. Contact the factory for further
determination of air infiltration rates.
3 ft. Min.
18 in.
Min.
Listed Wall Thimble
4" Pipe
6 in.
Min.
1/4 in. pitch per foot
(upward or downward)
X
Storm Collar
Listed
Flashing
Air Inlet Connection
band clamps are recommended)
Burner
Control Box
Air Inlet Connection
band clamps are recommended)
Control Box
34
DES3
Listed Exhaust Cap
Roof
(Flexible boot and
(Flexible boot and
Burner
Series
per
3