Grill wiith a flange and (4) screws to hold it in the foundation opening; has NO flap or slide mechanism to open or close it, so the air can constantly move through. Size: 7-3/4" x 15-1/4" so it easily fits the standard 8" x 16" block foundation opening.

Grill wiith a flange and (4) screws to hold it in the foundation opening; has NO flap or slide mechanism to open or close it, so the air can constantly move through. Size: 7-3/4" x 15-1/4" so it easily fits the standard 8" x 16" block foundation opening.

Grill wiith a flange and (4) screws to hold it in the foundation opening; has NO flap or slide mechanism to open or close it, so the air can constantly move through. Size: 7-3/4" x 15-1/4" so it easily fits the standard 8" x 16" block foundation opening.

Bestvents Foundation Vent, Manual, Black Oxide, With Damper

Bestvents Foundation Vent, Manual, Brown, With Damper

Bestvents Foundation Vent, Manual, Gray, With Damper

For King and Queen size brick. Fits 9-1/4" x 16" vent openings. 1-3/4" frame depth and 8" x 8" sized mesh. Mesh is made of aluminum perma kote epoxy charcoal. Frame is made of high-density polypropylene resins. 9-1/4" x 16".

Bestvents Foundation Vent, Manual, White, With Damper

Aluminum vanes, lintel not required. For block, brick, or frame construction. Recommended for high-level ventilation. Galvanized steel and aluminum. 8" x 16" x 2-3/4".

With 18" lintel for new construction. Fits standard 8" x 16" vent openings. High density thermo-plastic construction. Automatically opens at 70 degrees Fahrenheit, closes at 40 (approximately). Key working mechanism, bi-metal coil, fully enclosed by protective cover. No electrical hook-up required. Stainless steel and corrosion resistant metal parts. 62 square inches net free area. Heavy-duty aluminum mesh screen, front and back. 8" x 16".

With 18" lintel for new construction. Fits standard 8" x 16" vent openings. High density thermo-plastic construction. Automatically opens at 70 degrees Fahrenheit, closes at 40 (approximately). Key working mechanism, bi-metal coil, fully enclosed by protective cover. No electrical hook-up required. Stainless steel and corrosion resistant metal parts. 62 square inches net free area. Heavy-duty aluminum mesh screen, front and back. 8" x 16".

With 18" lintel for new construction. Fits standard 8" x 16" vent openings. High density thermo-plastic construction. Automatically opens at 70 degrees Fahrenheit, closes at 40 (approximately). Key working mechanism, bi-metal coil, fully enclosed by protective cover. No electrical hook-up required. Stainless steel and corrosion resistant metal parts. 62 square inches net free area. Heavy-duty aluminum mesh screen, front and back. 8" x 16".

Replaces old-style manual vents. Fits standard 8" x 16" vent openings. Automatically opens at 70 degrees Fahrenheit and closes at 40 (approximately). The key mechanism, bi-metal coil, fully enclosed in protective cover. Stainless steel compression spring with 1 adjustable screw for easy installation. 65 square inch net free area. High-density thermo-plastic construction. Stainless steel and corrosion resistant metal parts. Heavy-duty aluminum mesh screen, front and back. No electrical hook-up required. 8" x 16".

Replaces old-style manual vents. Fits standard 8" x 16" vent openings. Automatically opens at 70 degrees Fahrenheit and closes at 40 (approximately). The key mechanism, bi-metal coil, fully enclosed in protective cover. Stainless steel compression spring with 1 adjustable screw for easy installation. 65 square inch net free area. High-density thermo-plastic construction. Stainless steel and corrosion resistant metal parts. Heavy-duty aluminum mesh screen, front and back. No electrical hook-up required. 8" x 16".

Replaces old-style manual vents. Fits standard 8" x 16" vent openings. Automatically opens at 70 degrees Fahrenheit and closes at 40 (approximately). The key mechanism, bi-metal coil, fully enclosed in protective cover. Stainless steel compression spring with 1 adjustable screw for easy installation. 65 square inch net free area. High-density thermo-plastic construction. Stainless steel and corrosion resistant metal parts. Heavy-duty aluminum mesh screen, front and back. No electrical hook-up required. 8" x 16".

With 1"W frame for new construction or to replace old foundation vents. Fits standard 8" x 16" concrete block opening. Operates automatically without electricity; opens at 70 degrees Fahrenheit, closes at 40 (approximately). Simple homeowner/DIYer snap-in installation, with color matched set screws for additional stability. Removable back for maintenance and cleaning. Screened with 1/8" heavy-duty aluminum mesh. High-density thermo-plastic construction. All metal parts are corrosion resistant stainless steel. Aluminum louvers. No mortar required for installation. 62 square inch net free area. 8" x 16".

Replaces old-style manual vents. Fits standard 8" x 16" vent openings. Automatically opens at 70 degrees Fahrenheit and closes at 40 (approximately). The key mechanism, bi-metal coil, fully enclosed in protective cover. Stainless steel compression spring with 1 adjustable screw for easy installation. 65 square inch net free area. High-density thermo-plastic construction. Stainless steel and corrosion resistant metal parts. Heavy-duty aluminum mesh screen, front and back. No electrical hook-up required. 8" x 16".

With 1"W frame for new construction or to replace old foundation vents. Fits standard 8" x 16" concrete block opening. Operates automatically without electricity; opens at 70 degrees Fahrenheit, closes at 40 (approximately). Simple homeowner/DIYer snap-in installation, with color matched set screws for additional stability. Removable back for maintenance and cleaning. Screened with 1/8" heavy-duty aluminum mesh. High-density thermo-plastic construction. All metal parts are corrosion resistant stainless steel. Aluminum louvers. No mortar required for installation. 62 square inch net free area. 8" x 16".

With 1"W frame for new construction or to replace old foundation vents. Fits standard 8" x 16" concrete block opening. Operates automatically without electricity; opens at 70 degrees Fahrenheit, closes at 40 (approximately). Simple homeowner/DIYer snap-in installation, with color matched set screws for additional stability. Removable back for maintenance and cleaning. Screened with 1/8" heavy-duty aluminum mesh. High-density thermo-plastic construction. All metal parts are corrosion resistant stainless steel. Aluminum louvers. No mortar required for installation. 62 square inch net free area. 8" x 16".

Hi-density polyethylene construction. Auto-open at 70 degrees Fahrenheit, closes at 40 degrees to lower risk of frozen pipes and save energy. Replaces manual vent. Snap-in installation. 57 sq. in. NFVA. 16'' x 8''.

Bestvents Foundation Vent, Metal Slider, Cast Aluminum

With 18"L x 1 3/4"W built-in lintel for new block, brick or frame foundation construction. Durable polypropylene construction. 40 square inches net free area. 1/8" aluminum screen. 8" x 16".

With 18"L x 1 3/4"W built-in lintel for new block, brick or frame foundation construction. Durable polypropylene construction. 40 square inches net free area. 1/8" aluminum screen. 8" x 16".

With 18"L x 1 3/4"W built-in lintel for new block, brick or frame foundation construction. Durable polypropylene construction. 40 square inches net free area. 1/8" aluminum screen. 8" x 16".

With 18"L x 1-3/4"W built-in lintel for new block, brick or frame foundation construction. Durable polypropylene construction. 72 square inches net free area. 1/8" aluminum screen. 8" x 16".

Polymer construction, enclosure with with steel screen. Easy installation, fits in traditional foundation vent openings with simple plug and go operation.  Effectively removes damaging excess moisture from crawl spaces and basements, while helping to prevent the growth of mold. UL and ETL Listed.

Quiet 110 CFM ball bearing motor. Dries crawlspace gradually. Humidity sensor. Thermostat shuts fan off at low temperatures. U.L. approved. Mounts behind foundation vent for invisible operation. Ventilates 1650 cubic feet. 8" x 16".

Die-cast aluminum, grill style. Designed for nailing to floor joists or as a foundation block replacement. 8" x 16" .

Designed for nailing to floor joists or as a foundation block replacement. With 1-3/8"W lintel. 8" x 16".

Die-cast aluminum with lintel for foundation block construction. Positive open/close damper action. Lowers risk of frozen pipes, saves energy, and helps prevent foundation decay. 8" x 16".