NOTE: This is considered a custom size, there are no refunds/returns for this item. Please measure and confirm your filter size before purchasing. Custom sized filters may take up to 8-10 weeks for delivery.

Change Every 1 - 3 Months

Size (inches): 13x21x1 (Exact Size - 12½ x 20½ x ¾)

Quantity: Pack contains 12 furnace filters

Quality: Available in MERV 8, MERV 11 and MERV 13

Manufacturing: Proudly 100% Canadian made

Get 13x21x1 Furnace Filters Delivered To Your Door

PureFilters 13x21x1 pleated furnace air filters are manufactured in Canada using only the highest quality materials. We offer the 13x21x1 furnace filter in different MERV ratings so you can choose the one that is best for your home environment. We stand behind all of our furnace filters, meaning if you are not happy with our product, we will take it back and refund you in full, no questions asked. Our superior filters, outstanding customer service and fast delivery has made PureFilters become the #1 furnace filter supplier in Canada.

Indoor air quality is essential to our well being, and Canadians deserve a company that just gets it right. PureFilters was founded with a mission of making superior indoor air quality simple and affordable. Our cutting edge high capacity pleat technology is designed to catch as many particles as possible, without restricting air flow.

Not sure when to change your furnace filter? Check out our guide on how often you should change your furnace filter.

Not sure which MERV rating you should choose? Check out our MERV rating comparison chart.

Not sure if this is the correct furnace filter size? Check out our guide on nominal vs actual filter size.

Why PureFilters is Canada's #1 furnace air filter company

From hassle free returns, to instant responses via chat/phone/email, our PureFilters team goes above the call of duty to keep your air fresh without the stress. Be sure to check out the PureFilters Blog - Use Tips and Information On Indoor Air Quality

If you need help and prefer to speak to someone, please feel free to contact us anytime!

Experience the cleanest air in your home today, without paying a premium price for it.

PureFilters - keeping your air fresh, without the stress.

Custom Size Furnace Filters

Pleated 13x21x1 Furnace Filters - (12-Pack) - Custom Size MERV 8, MERV 11 and MERV 13