Burnham ALPINE - Page 24

24
Boiler
Model
3” Combustion Air Pipe
(Equivalent Length)
4” Combustion Air Pipe
(Equivalent Length)
3” Vent Pipe
(Equivalent Length)
4” Vent Pipe
(Equivalent Length)
Min. Max. Min. Max. Min. Max. Min. Max.
ALP080 30 In. 100 Ft. --- --- 30 In. 100 Ft. --- ---
ALP105 30 In. 100 Ft. --- --- 30 In. 100 Ft. --- ---
ALP150 --- --- 30 In. 100 Ft. 30 In. 100 Ft. --- ---
ALP210 --- --- 30 In. 100 Ft. 30 In. 100 Ft. --- ---
ALP285 --- --- 30 In. 60 Ft. --- --- 30 In. 60 Ft.
ALP399 --- --- 30 In. 60 Ft. --- --- 30 In. 60 Ft.
ALP500 --- --- 30 In. 60 Ft. --- --- 30 In. 60 Ft.
Table 7: Vent/Combustion Air Pipe Length – Two-Pipe Direct Vent System Options (CPVC/PVC and Stainless
Steel/PVC or Galvanized Steel)
Combustion Air Vent
90° elbow(s) PVC Supplied 30” straight CPVC
Quantity = x 5 = equiv. ft. a. Length ft. = 2.5 x 1 = 2.5 equiv. ft. a.
45° elbow(s) PVC Supplied 90° elbow CPVC
Quantity = x 2.5 = equiv. ft. b. Quantity = 1 x 5 = 5 equiv. ft. b.
Straight pipe PVC 90° elbow(s) PVC
Length ft. = x 1 = equiv. ft. c. Quantity = x 5 = equiv. ft. c.
45° elbow(s) PVC
Quantity = x 2.5 = equiv. ft. d.
Straight pipe PVC
Length ft. = x 1 = equiv. ft. e.
Total* a.+b.+c. = equiv. ft. Total* a.+b.+c.+d.+e.= equiv. ft.
* Total cannot exceed 60 equiv. ft. length.
Vent and combustion air terminals do not count towards total equiv. ft.
Vent/Combustion Air, Equivalent Length Work Sheet
This sheet is supplied to assist in vent/combustion air, equivalent length calculating
Figure 6A: Near-Boiler Vent/Combustion Air Piping - Floor Mounted Boiler Builds
IV. Venting (continued)