Serving the HVAC industry since 1992
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Item #

Wall Size

Exhaust Direction

Thickness

Industry Standards

List Price

N/A 2 x 4 in N/A Downward N/A 21 gauge N/A Underwriters Laboratories (UL) Quote
N/A 2 x 6 in N/A Downward N/A 21 gauge N/A Underwriters Laboratories (UL) Quote
N/A 2 x 4 in N/A Upward N/A 22 gauge N/A Underwriters Laboratories (UL) Quote
N/A 2 x 6 in N/A Upward N/A 22 gauge N/A Underwriters Laboratories (UL) Quote
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