Hercules offers premium Concentric Vent Kits that provide efficiency and less structural hastle.

Specifications: 

SKU Description Prod Info Price/Units Quantity
51W18 CRAWL SPACE/VENT KIT 2" & 3" Product_Details EA
60L46 3" CONCENTRIC VENT KIT 1/BOX Product_Details EA
69M29 2" CONCENTRIC VENT KIT 1/BOX Product_Details EA
HVENT-2 HORIZONTAL TERMINATION KIT 2" Product_Details EA
HVENT-3 HORIZONTAL TERMINATION KIT 3" Product_Details EA