Brant Radiant Heaters AVS-40N Instructions Manual page 22

3.0 Installation • Venting
Common Venting
• When joining two heaters to a common vent, a staggered arrangement or a dual exhaust assembly
(P/N: YSM) must be used so that by-products of one heater do not flow into the adjoining vent of the
other heater.
• 6 in. diameter double-wall Type B-vent and 6 in. vent cap must be used.
• Common vented heaters must be controlled with the same thermostat. Do not operate individually.
Figure 3.13 • Common Rooftop Venting - Side View
Rooftop Vent Cap
Double-Wall B
Vent
Firestop Spacer
Heater
Figure 3.14 • Common Sidewall Venting - Top View
Sidewall
Sidewall Vent Cap
Wall Thimble
Double-Wall B-Vent
Single Wall Vent
• Common Venting
24 in.
Min.*
Dual Exhaust
Assembly
B to C
6 in.
Min. Adapter
*Consult the NFPA ANSI Z223.1 Gas Vent
Termination criteria if roof pitch exceeds 9:12.
Roof
Heater
Heater
Dual Exhaust
Assembly
Heater
22
AVS Series