Witten A-ELBLACK Plastic Auto Foundation Vent Crystal Drain Cleaners One-piece construction has no soldered

One-piece construction has no soldered of brazed joints

CSA Approved

1-3/4" frame depth and 8" x 8" sized mesh

625 inch x 7 inch

Hot dipped galvanized joist

Witten A-ELBLACK Plastic Auto Foundation Vent Crystal Drain Cleaners One-piece construction has no solderedAutomatically opens at 70 degrees Fahrenheit, closes at 40 (approximately). Key working mechanism, bi metal coil, fully enclosed by protective cover. Heavy duty aluminum mesh screen, front and back. 8" x 16". No electrical hook up required. Highlights: 62 square inches net free area With 18" lintel for new construction Fits standard 8" x 16" vent openings High density thermo plastic construction Stainless steel and corrosion resistant metal parts