Rooftop Venting - Re-Verber-Ray LD Series Installation Manual

3.0 Installation
• Sidewall Venting • Rooftop Venting
Vent Termination
United States:
• Vent must terminate a minimum of 4 ft. below, 4 ft. horizontally from, and 1 ft. above any window
or door that may be opened or gravity air inlet into the building.
• Vent must terminate a minimum of 3 ft. above any forced air inlet that is located within
10 ft.
• The bottom of the vent terminal must be located a minimum of 12 in. above grade level
and must extend beyond any combustible overhang. Vents adjacent to public walkways must
terminate a minimum of 7 ft. above grade level.
• The vent terminal must be installed to prevent blockage by snow and protect building materials
from degradation by flue gases.
• The vent cap must be a minimum of 6 in. from the sidewall of the building.
• Vent must be a minimum of 36 in. below or extend beyond any combustible overhang.
• Consult the NFPA ANSI Z223.1 Gas Vent Termination criteria if roof pitch exceeds 9:12.
Canada:
• Vents must terminate a minimum of 3 ft. from a window or door that may be opened, and
non-mechanical air supply inlet or combustion air inlet into the building.
• Vents must terminate a minimum of 6 ft. from a mechanical air supply inlet.

Rooftop Venting

Guidelines:
Vent Locations and Clearances
• Separate air intake duct from vent pipe a minimum of 4 ft. by placing vent pipes higher
than adjacent air intake duct.
• Venting may utilize standard B-vent cap.
• The vent terminal must extend a minimum of 2 ft. above the roof.
Figure 3.22 • Rooftop Venting - Side View
3 in. Vent Cap
Roof
B to C Adapter
Single Wall Elbow or Alternate Tee Fitting
24 in. Min.*
Roof
3 in. Double Wall B Vent Pipe
Firestop Spacer
Heater
26
LD Series
*Consult the NFPA ANSI Z223.1 Gas
Vent Termination criteria if roof pitch
exceeds 9:12.