Nominal Size: 20 x 20 x 1 Actual Size: 19-1/2 x 19-1/2 x 3/4 Part #: UF13-12020-12 MERV: 13 Case: 12 Price: $134.99 Manufactured: Canada *Effective for dust, pollen, pet dander, bacteria and mould.

Buy premium HVAC filters online for superior air quality and HVAC system protection. Choose high-MERV filters that trap dust, allergens, and pollutants.

Shop geothermal air filters at United Filter. High-efficiency filters designed for optimal geothermal HVAC performance and clean indoor air. Order now!

Nominal Size : 16x20x4 Actual Size : 15-1/2 x 19-1/2 x 3-3/4 Part #: UF11-41620-6 MERV Rating: 11 Case: 6 Price: $114.99

Want cleaner air at home? Learn what the MERV rating for furnace filters means, why they matter, & how to choose the best MERV furnace filters for your needs.

In an era where sustainability and energy efficiency are more important than ever, geothermal heating and cooling systems have become an increasingly popular choice for homes and businesses in Canada. These systems offer a clean, renewable way to regulate indoor temperatures year-round. But like all...

Nominal Size: 16 x 24 x 1 Actual Size: 15-1/2 x 23-1/2 x 3/4 Part #: UF11-11624-12 MERV: 11 Case: 12 Price: $94.99 *Effective for dust, pollen, pet dander, bacteria and mold.

When it comes to maintaining the comfort and air quality of your home or business, furnace filters play a crucial role. If you’re searching for high-quality, affordable, and custom-sized f

How often is furnace filter replacement necessary? Learn about replacement frequency, MERV ratings, and how to change your furnace filter in 7 easy steps.

When it comes to maintaining clean, healthy air in commercial, industrial, and institutional environments, having the right filtration system in place is crucial. One of the most effective and widely used solutions in HVAC systems today is...

Breathe Easy with United Filter's Unbeatable Selection of 1-Inch Furnace Filters Looking for the best 1-inch furnace filters in North America without breaking the bank? United Filter stocks a massive selection of 1 inch furnace filters in various sizes to perfectly fit your HVAC system. Our furnace filters are available at the lowest prices in Canada and USA. We guarantee you won’t find lower prices on 1 inch furnace filters on Amazon. Their prices can fluctuate. We prioritize providing superior quality household air filters at the lowest prices guaranteed. Skip shopping around for furnace filters and breathe confidently with United Filter. A Perfect Fit, a Perfect Furnace Filter: Finding the Perfect Size is Paramount! Most 1-inch furnace filters are typically in standard dimensions like 16x20x1 or 20x25x1. However, based on our experience selling 1-inch furnace filters, we recommend that you confirm the size of your existing furnace filter before ordering. For your furnace to operate at maximum efficiency, at the lowest cost, and maintain optimal indoor air quality, it’s super important you double-check the correct filter size before ordering. How do you find your furnace filter size? You’ll need the length, width, and depth in inches, and It’s easy to find! Just locate the existing filter in your furnace and measure its length, width, and depth. When your new 1 inch furnace filter arrives, make sure it fits snugly into the filter rack. If a 1 inch furnace filter fits too tight or too loose, it will not be as effective. Follow these simple steps to get the right furnace filter for your system and improve your home's indoor air quality.