Lennox X8790 – PureAir PCO14-23 20x21x5 MERV 16 Filter


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Get The Lennox X8790 – PureAir PCO14-23 20x21x5 MERV 16 Filter Delivered To Your Door


  • Lennox X8790 air filters fit the PCO14-23 PureAir unit.
  • Filter dimensions: 20" x 21" x 5" 
  • Actual filter size: 20″ x 20-5/8″ x 4-3/8″
  • MERV 16
  • Lennox PCO14-23
  • Replace annually 


The Lennox Healthy Climate PureAir replacement furnace filter has MERV 16 pleated filtration to capture particles in the air stream. In most home environments, this Lennox X8790 filter only needs to be replaced every 12 months.

With annual filter replacement, you help your system operate at its best and maintain high-quality indoor air. Remove contaminants from your home with Lennox X8790 air filters in your PureAir system. The filter removes more than 95% of the particles and bioaerosols (dander, pollen, bacteria, molds, spores, etc.) as they flow through the PCO. The MERV rating of a filter describes the size of the holes in the filter that allow air to pass through. The higher the MERV rating, the smaller the holes in the filter providing enhanced filtration. 

Check out the Maintenance Kit available for your Lennox PUREAIR Air Purification System, PCO14-23.


The PureFilters Promise 

Indoor air quality is essential to our well-being, and Canadians deserve a company that gets it right. PureFilters was founded with one mission - to help Canadians breathe healthy indoor air. 

We source our products directly from Canadian manufacturers. By cutting out big box retailers we're able to pass the savings on to you - our valued customer.

PureFilters is Canada's #1 Filter Company in Canada

From hassle-free returns to instant responses via chat/phone/email, our PureFilters team goes above and beyond to help you find the right product for your home. If you need assistance with your order or have any questions, feel free to reach out to us anytime! 

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.


PureFilters - keeping your air fresh, without the stress.

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