Detroit Radiant Products Company QTD Series - Manual (Page 23)

QTD Series
23
3.0 Installation • Venting • Common Venting
Figure 3.13 • Common Rooftop Venting - Side View
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 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 3.14 • Common Sidewall Venting - Top View
*Consult the NFPA ANSI Z223.1 Gas Vent
Termination criteria if roof pitch exceeds 9:12.
Rooftop Vent Cap
Roof
Dual Exhaust
Assembly
Heater
Firestop Spacer
Double-Wall B
Vent
24 in.
Min.*
Double-Wall B-Vent
Heater
Heater
Dual Exhaust
Assembly
Sidewall
Sidewall Vent Cap
Wall Thimble
B to C
Adapter
Single Wall Vent
6 in.
Min.
Heater