Combustion Air Requirements - Brant Radiant Heaters DX3L Series Manual

DX3L Series
Non-contaminated outside air for combustion must be ducted to the heater if any of the
following apply:
• Chemicals such as chlorinated or fluorinated hydrocarbons (typical sources are refrigerants,
solvents, adhesives, degreasers, paints, paint removers, lubricants, pesticides, etc.).
• High humidity.
• Contaminants such as sawdust, welding smoke, etc.
• Negative building pressure.
• Unusually tight construction where there is an air infiltration rate of less the 0.40 air changes per
hour.
Guidelines:
Combustion air intake may be located on either the sidewall or roof (see figures 3.26-3.28).
Figure 3.26 • Vertical Outside Air
Supply for Single Heater Intake - Side
View
Figure 3.27 • Horizontal Outside Air
Supply for Single Heater Intake
- Side View
Figure 3.28 • Vertical Outside Air
Supply for Common Intake - Side
View
NOTE: Common
intake heaters must
share the same
thermostat.
Burner
Control Box
3.0 Installation
•
4" pipe
Air Intake Cap
18 in.
minimum
Air Inlet Connection
4" intake pipe
Separated Combustion Systems
Roof intake Cap
18 in.
minimum
Air Inlet Connection
Air Inlet Connection
Wall
4" Pipe
Roof Intake Cap
6" pipe
Air Inlet Connection
4" intake pipe
37
•

Combustion Air Requirements

Roof
(Flexible boot and band
clamps are recommended)
Burner
Control Box
(Flexible boot and band
clamps are recommended)
Burner
Control Box
Roof
(Flexible boot and band
clamps are recommended)
Burner
Control Box