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Indoor Air & Water Quality Made Easy

Find Your Furnace Filter or Water Filter In Seconds

With over 900 different sizes and models, we are confident that we will have your furnace filter in stock. If for some reason you cannot find your size, we make custom furnace air filters too! Please select one of the following ways to search for your furnace filter:

Browse Furnace Filter Sizes

Browse Furnace Filter Brands

Browse Furnace Filter MERV Ratings


View All Furnace Filter Categories

With over 100 different water filter models, we are confident that we will have your filter in stock. Please select one of the following ways to search for your water filter:

Browse by fridge water filters

Browse by under sink water filters


View All Water Filters

PureFilters Is The #1 Filter Company in Canada. And Don't Just Take Our Word For It, Check Out PureFilters Reviews From Customers.

Canadian-made filters with perfect pleats, shipped to your door.

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

Free Shipping in Canada  |  Delivered To Door in 3-5 Days  |  100% Satisfaction Guaranteed

Search For Your Filter

Search by size (16x25x1) or model number (Lennox X6670)


Have Questions About Furnace Filters? Here Are Some Answers

What is a MERV rating? - MERV, acronym for "Minimum Efficiency Reporting Value" are ratings that are commonly used to measure the effectiveness and efficiency of a filter. MERV measures the ability of a filter to remove impurities from air as it passes the filter. This scale was designed by ASHRAE (American Society of Heating, Refrigeration and Air Conditioning Engineers) to gauge the effectiveness of filters. Click here to read our guide to MERV ratings.

Which MERV furnace filter do I need? - Each home is unique and therefore require a different MERV rating. PureFilters carries furnace filters with MERV ratings from 8 to 16. We wrote a guide on MERV ratings and how to select the best one for your home. Click here to read it.

How often do I need to change my furnace filter? - It really depends because each home environment is different and therefore requires different change frequency. Depending on where you are located, who lives in your home and various other factors, it can range from every 1 month to every 6 months. We do have an entire guide on how often you should change your furnace filters, Click here to read it.

What size is my furnace filter? - Always double check the measurements on your current filter to ensure you buy the correct size. Often times a filter has 2 sizes, the "nominal size" and the "actual size". The nominal size is purely for marketing purposes. Companies often round up or down the measurements in order to get a nice even number. The actual size is the actual measurements of your filter. We wrote a guide on how to find the correct furnace filter size, click here to read it.


Blog Posts

Tips On Keeping Your Air & Water Fresh

Introducing Maskwell: MERV 13 Masks For Non-Healthcare Workers
Introducing Maskwell: MERV 13 Masks For Non-Healthcare Workers
Apr 22, '20

Nadir Chaudhry

As the current situation develops, the PureFilters team has been busy working on helping our fellow Canadians keep their air fresh.However, each day we kept hearing about personal protective equipment (PPE) shortages and people not having the right equipment to safeguard against airborne contaminants.Our passion for air quality had us...

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COVID-19 And Indoor Air Quality and Air Filtration
COVID-19 And Indoor Air Quality and Air Filtration
Apr 11, '20

Nadir Chaudhry

We've been getting a ton of questions related to the Coronavirus (COVID-19) from our customers, so we figured it might be a good idea to write a quick blog post.  The Coronavirus has been declared a global pandemic by WHO. It is a very contagious virus that can easily spread...

Read more