Exhaust Fans and Fan Accessories | GRS-18 from $366.66

WD-100 BDD-8x8

WD-100 BDD-10x10

WD-100 BD-12x12

WD-100 BDD-16x16

WD-100 BDD-18x18

WD-323 BDD-15x15

12.5" x 12.5"

Roof Curb 12" H x 12.5x12.5

15.5" x 15.5"

Roof Curb 12" H x 15.5x15.5

17.5" x 17.5"

Roof Curb 12" H x 17.5x17.5

20.5" x 20.5"

Roof Curb 12" H x 20.5x20.5

28.5" x 28.5"

Roof Curb 12" H x 28.5x28.5

Dimension A (in)	30
Dimension B (in)	35 1/2
Dimension C (in)	9 3/4
Optional Gravity Relief Damper (in)	18 x 18

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