AERCO Innovation (G-10-1350 to G-11-0563) - Manual (Page 162)

GF - 5050
TAG-0043_0C Venting and Combustion Air Guide
Page 162 of 200 AERCO International, Inc.
· 100 Oritani Dr. · Blauvelt, NY 10913 · Ph.: 800-526-0288
07/21/11
Model No.
Pipe
Diameter
Equivalent Pipe Lengths Examples
Maximum Length
Equivalent Ft (m)
Sharp 90°
Elbow
Equiv. Ft (m)
Sweep 90°
Elbow
Equiv. Ft (m)
45° Elbow
Equiv. Ft (m)
INN600 4”
(102 mm)
10 ft.
(3.05 m)
5 ft.
(1.5 m)
5 ft.
(1.5 m)
140 ft.
(42.7 m)
INN800
INN1060
6”
(152 mm)
10 ft.
(3.05 m)
N/A 5 ft.
(1.5 m)
140 ft.
(42.7 m)
The maximum pressure drop of the vent is also 140 equivalent feet (30.5 m). See Section 3.4. Note
that this does NOT mean the allowed combined pressure drop between the vent and combustion air is
280 equivalent feet (85.3 m). That is, the vent cannot go above 140 equivalent feet (42.7 m), even if
the combustion air is less than 140 equivalent feet, and vice versa.
Examples:
1. A 40 foot length of combustion air pipe and 1 sharp 90° elbow plus two termination 90° elbows
add up to 40 ft + 10 ft + (2 x 10 ft) = 70 equivalent ft (21.3 m).
2. A 30 foot length of combustion air pipe and 2 sharp 90° elbows plus two termination 90° elbows
add up to 30 ft + (2 x 10 ft) + (2 x 10 ft) = 70 equivalent ft (21.3 m).
2.3 COMMON COMBUSTION AIR PIPE SIZING
Refer to Figures 6 and 7 for typical common combustion air inlet installations. The maximum length is
the sum of the equivalent straight length of horizontal runs, vertical runs, and fittings of the individual
combustion air connector and the common combustion air pipe. The required diameter lengths for a
given Innovation total BTU/hr Input are as follows:
Total BTU/hr Input
(up to and including)
606,000 1,212,000 2,120,000 3,180,000 4,240,000
Common Combustion Air
Diameter 4”
(102 mm)
6”
(152 mm)
8”
(203 mm)
10”
(254 mm)
12”
(305 mm)
Maximum Combustion Air à
Individual Connector plus
Common Combustion Air
Equivalent Feet (Meters) 140
(42.7 m)
140
(42.7 m)
140
(42.7 m)
140
(42.7 m)
140
(42.7 m)
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