
27
HL3
Series
3.0
Installation
•
Common Venting
Figure 3.22
•
Common Rooftop Venting - Side View
Common Venting
• A staggered arrangement or a dual exhaust assembly (P/N: Y) must be used when joining two
heaters to a common vent 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.
Double-Wall B-Vent
Rooftop Vent Cap
Roof
Dual Exhaust Assembly
(P/N: Y)
Heater
Firestop Spacer
Double-Wall B Vent
24 in.
Min.
(Above highest roof elevation within 10 ft.)
Heater
Heater
Dual Exhaust Assembly
(P/N: Y)
Sidewall
Sidewall Vent Cap
Wall Thimble
B To C
Adapter
Single Wall Vent
6 in.
Min.
Heater
Figure 3.23
•
Common Sidewall Venting - Top View