Lennox GCWB95W-150 Installation Instructions

22
240012994 Rev. B [08/31/2020]
5 - COMBUSTION AIR AND VENT PIPING
5.10 (3" / 80 mm Only) Flexible Vent System
Flexible Pipe Minimum & Maximum Vent Lengths
3” [80 mm]
Diameter Pipe
150 205
Min Max Min Max
Natalini
Exhaust
6 ft
[1.8 m]
75 ft
[22.8 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
Intake
6 ft
[1.8 m]
50 ft
[15.2 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
DuraVent
®
Exhaust
6 ft
[1.8 m]
82 ft
[24.9 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
Intake
6 ft
[1.8 m]
50 ft
[15.2 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
Centrotherm
Exhaust
6 ft
[1.8 m]
52 ft
[15.8 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
Intake
6 ft
[1.8 m]
50 ft
[15.2 m]
6 ft
[1.8 m]
50 ft
[15.2 m]
Z-Dens
Exhaust
NA
6 ft
[1.8 m]
50 ft
[15.2 m]
Intake
Single Wall Elbows - Equivalent Length
3" [80 mm]
45° bend 0.82 ft [0.25 m]
90° bend 1.64 ft [0.50 m]
• Maximum vent lengths based on equivalent straight
runs only. Include rigid pipe and ttings in overall
equivalent length calculations.
• Flexible venting installations use single wall
polypropylene to pass ue gasses to base of chimney,
then exible venting to get them to termination at the
top.
• Combustion air is not supplied through masonry
chimney. Combustion air must be from outside using 3"
[80 mm] single wall polypropylene.
• Position boiler to use minimum of rigid single wall
polypropylene venting to the chimney.
• Follow venting manufacturer's instructions on assembly
and clearances to maintain.
• Avoid sharp bends in exible venting.
FIGURE 5-24 - (3" / 80 mm Only) Flexible Venting
System CAN BE USED ON ALL SIZES
Combustion
Air
Vent Terminal
Flexible Vent
Note
Flexible vent systems shall only be run vertical.
Horizontal runs before adapting to exible must
be rigid pipe.
Rigid Vent
Condensate Tee
Note
Prime trap before nal assembly of vent.

Lennox GCWB95W-150 Specifications

General

Brand	Lennox
Model	GCWB95W-150
Category	Boiler
Language	English