100% Secure Payments

Loved by our Customers. 8000+ Reviews

Free Shipping and Free Returns

Showing all 11 results

20x20x4

$52.46

Actual Size: 19-1/2 x 19-1/2 x 3-3/4. Glasfloss ZL Series MERV 10 air filters are constructed with a sturdy, moisture resistant frame and synthetic media that will not support microbial growth. Change every 30-90 days for best filtration results.

Ships in 1 Business Day

Sale!
Original price was: $81.18.Current price is: $77.70.

Actual Size: 19-1/2 x 19-1/2 x 3-3/4. Glasfloss ZL Series MERV 10 air filters are constructed with a sturdy, moisture resistant frame and synthetic media that will not support microbial growth. Change every 30-90 days for best filtration results.

Ships in 1 Business Day

$76.24

Glasfloss Z-Line 400 HW 20x20x4 MERV 10 air filters are designed to replace the Honeywell FC100A1003 (and other) filters and excel where similar HVAC filters (Heating, Ventilation & Air Conditioning) fall short. These MERV 10 air filters also offer an eco-friendly design and enhanced particle filtration. The air filter frame is constructed of heavy-duty, moisture [...]

Ships in 1 Business Day

$167.34

Glasfloss Z-Line 400 HW 20x20x4 MERV 10 air filters are designed to replace the Honeywell FC100A1003 (and other) filters and excel where similar HVAC filters (Heating, Ventilation & Air Conditioning) fall short. These MERV 10 air filters also offer an eco-friendly design and enhanced particle filtration. The air filter frame is constructed of heavy-duty, moisture [...]

Ships in 1 Business Day

$185.70

Glasfloss Z-Line 400 HW M11 20x20x4 MERV 11 air filters are designed to replace the Honeywell FC100A1003 (and other) filters and excel where similar HVAC filters (Heating, Ventilation & Air Conditioning) fall short. These MERV 11 air filters also offer an eco-friendly design and enhanced particle filtration. The air filter frame is constructed of heavy-duty, [...]

Ships in 1 Business Day

Sale!
Original price was: $118.50.Current price is: $107.15.

Actual Size: 19-1/2 x 19-1/2 x 3-3/4. Glasfloss ZL Series MERV 11 air filters are constructed with a sturdy, moisture resistant frame and synthetic media that will not support microbial growth. Change every 30-90 days for best filtration results.

Ships in 1 Business Day

Sale!
Original price was: $246.64.Current price is: $235.27.

Actual Size: 19-1/2 x 19-1/2 x 3-3/4. Glasfloss ZL Series MERV 13 air filters are constructed with a sturdy, moisture resistant frame and synthetic media that will not support microbial growth. Change every 30-90 days for best filtration results.

Ships in 5-10 Business Days

$294.08

Cooking odors, odors from smoking and many other activities create offensive odors and are a problem in many homes. The 20x20x4 Glasfloss Z-Line Carbotron furnace filters are the answer to these along with many other odor issues associated with IAQ (Indoor Air Quality). Carbotron furnace filters incorporate activated carbon in the air filter media to [...]

Ships in 5-10 Business Days