170 SERIES WHITE RETURN AIR
AVAILABLE SIZES BELOW.... ALL SIZES ARE THE HOLE SIZE. THE OUTSIDE (FULL) SIZE OF THE VENT WILL BE 1 5/8 INCHES LARGER.
6 X 6 18 X 4 36 X 4
8 X 8 18 X 6 36 X 6
10X 4 18 X 8 36 X 8
10 X 6 18 X 10 36 X 10
10 X 8 18 X 12 36 X 12
10 X 10 18 X 14 36 X 14
10 X 12 18 X 16 36 X 16
10 X 14 18 X 18 36 X 18
10 X 16 18 X 20 36 X 20
10 X 18 18 X 24 36 X 24
10 X 20 18 X 30 36 X 30
10 X 24 18 X 36 36 X 36
10 X 30 20 X 4
10 X 36 20 X 6
12 X 4 20 X 8
12 X 6 20 X 10
12 X 8 20 X 12
12 X 10 20 X 14
12 X 12 20 X 16
12 X 14 20 X 18
12 X 16 20 X 20
12 X 18 20 X 24
12 X 20 20 X 30
12 X 24 20 X 36
12 X 36 24 X 4
14 X 4 24 X 6
14 X 6 24 X 8
14 X 8 24 X 10
14 X 10 24 X 12
14 X 12 24 X 14
14 X 14 24 X 16
14 X 16 24 X 18
14 X 18 24 X 20
14 X 20 24 X 24
14 X 24 24 X 30
14 X 30 24 X 36
14 X 36 30 X 4
16 X 4 30 X 6
16 X 6 30 X 8
16 X 8 30 X 10
16 X 10 30 X 12
16 X 12 30 X 14
16 X 14 30 X 16
16 X 16 30 X 18
16 X 18 30 X 20
16 X 20 30 X 24
16 X 24 30 X 30
16 X 30 30 X 36
16 X 36
