20x20x4 Furnace Filter Camfil AP-3. (6-pack) $124.00 $110.00

MERV 8 yields high indoor air quality with an exceptional filter that rivals the brand name competition. GREAT VALUE: You pay only $18.33 each! Pay less, get more. Most affordable product of this size! HIGHLIGHTS MERV...

20x20x4 Furnace Filter Camfil 30/30. (6-pack) $175.00 $156.00

MERV 8: Best selling -- 5 Star Rated with Innovative Technology. Ultimate filter for Canadian homeowners. Offers the best value for price, lifespan, and air quality with brand name reliability. Pay only $26 per filter! This...

20x20x4 Furnace Filter Camfil AP-11. (6-pack) $182.00 $162.00

MERV 11: High Efficiency -- State of the art filtration capabilities remove allergens, the perfect choice for Canadian homeowners to elevate air quality. Brand name reliability at a low cost: pay only $27 per furnace filter!...

20x20x4 Furnace Filter Camfil AP-13. (6-pack) $277.00 $248.00

MERV 13: Highest Efficiency filtration. The BEST Canadian homeowners can buy! Better performance, superior results for a cleaner, safer home. And at just $41.33 per filter, you’re paying for superior dust and allergen...