Forced Air Furnaces Dimensions

Comfort Plus (Centrally Ducted) Dimensions, Clearance Requirements and Ducting

3100 Dimension:

3100 Clearances:

A    Back = zero clearance
B    Front = 36 inches
C    Right Side = 8 inches (from combustible material)
D    Top = 8 inches (from combustible material)
E    Left Side = 4 inches
F    Outer Sides of Return and Supply Ducts  = zero clearance
G   Bottom = zero clearance

4100 Series Dimensions:

4100 Series Clearances:

A    Back and sides = 3 inches (from combustible material)
B    Front = 36 inches
C    Top = 6 inches (from combustible material)
D    Between Duct and Left side of system = 2 inches
E    Outer Sides of Return and Supply Ducts  = zero clearance
F    Between Duct and Right side of system = zero clearance
G    Bottom = zero clearance