20x24x4 Furnace Filter Camfil AP-3. (6-pack) US$99.55 US$86.43

MERV 8 yields high indoor air quality with an exceptional filter that rivals the brand name competition. GREAT VALUE: You pay only $18.67 each! Pay less, get more. Most affordable product of this size! HIGHLIGHTS MERV 8...

20x24x4 Furnace Filter Camfil 30/30. (6-pack) US$142.76 US$124.24

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 $26.83 per filter!...

20x24x4 Furnace Filter Camfil AP-11. (6-pack) US$144.31 US$125.79

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 $27.17 per furnace...

20x24x4 Furnace Filter Camfil AP-13. (6-pack) US$195.24 US$169.77

MERV 13: Highest Efficiency filtration. The BEST Canadian homeowners can buy! Better performance, superior results for a cleaner, safer home. And at just $36.67 per filter, you’re paying for superior dust and allergen...