We offer three sizes: 20×20×1, 20×16×1, and 20×25×1 — the most common residential furnace filter sizes in Canada. Check the label on your existing filter or your furnace manual to find the right fit.

Pull out your current furnace filter — the size is printed on the cardboard frame. Order the matching Filter4Life size.

We recommend swapping the sleeve every 60–90 days, or when you notice visible buildup. Homes with pets or high dust may benefit from swapping every 30–45 days.

Your Filter4Life comes with two microfiber sleeves. When it's time to clean, simply pull out the dirty sleeve and slide in the fresh one — takes about 30 seconds. Toss the dirty sleeve in the washing machine with your regular laundry. By the time you need to swap again, it's clean and ready to go. No waiting, no drying time, no downtime.

Filter4Life filters are MERV 8 rated, capturing 94% of airborne particles including dust, pollen, mold spores, and pet dander.

With proper washing, each Filter4Life filter lasts at least 10 years — replacing 120+ single-use filters that would otherwise go to landfill.

Yes. Filter4Life works with any central forced-air heating and cooling system, including Carrier, Lennox, Trane, York, Goodman, and all major brands. If your furnace uses a standard 1-inch filter slot, it will fit.

We currently ship within Canada only. Free shipping on all orders, coast to coast.