Air Systems International BAC-20F-1 Intake Replacement Filter for BAC-17/20 mylar duct Rough In (W x H):

Rough In (W x H): 55

female NPT port and has a flow capacity of 21 SCFM at 90 psi

Schaefer WS-180 aluminum shutter is built tough to last a lifetime in the harshest environments

2mm) gate opening

Air Systems International BAC-20F-1 Intake Replacement Filter for BAC-17/20 mylar duct Rough In (W x H):Air Systems International BAC 20F 1 Intake Replacement Filter for BAC 17 20 Air Systems International BAC 20F 1 Intake Replacement Filter for BAC 17 20 (BAC 20F 1) is an Air Systems International Replacement Filter. Product details from the Air Systems pricing file: INTAKE REPLACEMENT FILTER FOR BAC 17 20; AND OLD STYLE TA 1 (BEFORE 2008), 1 EA.. Use this listing to confirm the item number, shipping details, and basic product data before ordering.