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Lennox X8795 Healthy Climate PureAir System Annual Maintenance Kit PCO20-28

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Lennox X8795 Pureaire Annual Maintenance Maintenance Kit for PCO20-28 PureAir Air Cleaner.
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Includes MERV 16 Media Filter, PCO Metal Insert, and UV Lamps This maintenance kit includes: (1) MERV 16 pleated filter model X8788 (1) PCO metal insert model X8791 (2) UV lamps model X8794 Note: DO NOT WASH metal insert. Washing will destroy the titanium dioxide catalyst that coats the insert surface.See The Lennox MERV 16 Healthy Climate Collection
  • Lennox Genuine OEM p(roduct
  • 1) PCO metal insert model X8791
  • (2) UV lamps model X8794
  • (1) MERV 16 pleated filter model X8788
  • Filter Diminsions 20X25 1/4X4 3/8

Customer Reviews

Based on 96 reviews
Furnace Filter

Excellent filter, shipping was right on time.

Exact Product and Great Support

Needed this ASAP and Atomic go it to me ASAP. Thank you.

Best bang for your buck

Exactly what i needed at a great price.

PureAir Annual Maintenance Kit

Very pleased with the great customer service and timely delivery of the product. We will order annual maintenance supplies from Atomic in future.

Best of the best

Filter out all your breathing related concerns with this annual kit.

Nominal Vs. Actual Sizes: Finding the Right Air Filter Size

Buying the Correct Size Air Filter- The Most Important Thing to Know 

When you are buying your air filter online most important thing to know is Air Filters have two sizes that you need to understand the Nominal size and the Actual Size. Not understanding these numbers often leads to consumers purchasing a filter that does not fit their Furnace or HVAC system. See the complete list of Air Filters by Size Rating and Brand.

Nominal vs Actual air filter size by Atomic


Understanding Nominal Filters Size Could Save You Time and Money

Not understanding the Nominal Filter Size is the primary culprit for incorrectly purchased filters.The Nominal Size is the usually the dimensions used to Label the filter. For instance 16x20x1. These dimensions are a rounded value on the filters actual measurements. The actual measurements on this filter may be 15.5x19.5x.75, but that could vary by brand and manufacturer. So in order to make sure you have the correct size filter, especially if you are replacing with a different brand it is important to confirm the actual size on the filter. When purchasing filters on the internet the Nominal size is usually found in the product title.

Actual Filter Size- The Key to Making the Right Replacement Filter Purchase

The actual size as you might have guessed are the actual dimensions of the filter by length, width and thickness. This size is often on the filter right below the Nominal size and is usually labeled as the actual size. When you are buying a filter online the actual size is sometime in the product bullet point or the product description. If your filter does not have actual dimensions on the outside of the filter, you can measure you filter to get the correct dimensions. Some brands have a foam gasket on the outside of the filter, in this case, you will want to make sure you have a compatible actual size and that it also has the foam to ensure a snug fit. 

Lennox Air Filter X0851 with Foam strips

Examples of Nominal and Actual Sizes

 Size  Example 1  Example 2
Nominal Size 20x20x1 16x20x1
Actual Size 19.5x19.5x.75 15.75x19.75x.75


 Furnace filters should fit securely but should not have to be forced into position. If you have to force the filter into its slot, then it is probably too big. Forcing an improper filter size in a filter can cause it to buckle, damaging the filter or reducing its ability to function properly. Filters are a smaller than their slot to allow for easy replacement. Some HVAC units may need a filter with dimensions that are unique or uncommon. In these cases, a custom filter needs to be ordered.

Find Your Filter Sizes Easy in 1" Deep Filters , 2" Deep Filters, 4" Deep Filters