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31
DX3L
Series
3.0
Installation
•
Vertical Venting (Category I)
Figure 3.21
•
Rooftop Venting - Side View
*Consult the NFPA ANSI Z223.1 Gas Vent Termination criteria if roof pitch exceeds 9:12
24 in.
Min.*
Double-Wall B Vent
Roof*
Heater
1 in. Minimum Clearance -
Use Attic Insulation Shield
(Field Supplied)
Fire Stop Spacer
#8 Sheet Metal Screws (field supplied)
Adjustable Roof Flashing
Storm Collar
B to C Adapter
Clean Out Tee Fitting
Vent Cap
Clean Out Cap