BestAir® 20 x 25 x 4 Pet Air Cleaning Furnace Filter MERV 11, Carbon Infused to Neutralize Odor, For Honeywell Models Size:20" x 25" x 4" fits 4" sewer & drain

fits 4" sewer & drain pipe & fittings

KW1 Keyway

Measure the total area to be sprayed

Drop-forged octagon polished head

Thin kerf design

BestAir® 20 x 25 x 4 Pet Air Cleaning Furnace Filter MERV 11, Carbon Infused to Neutralize Odor, For Honeywell Models Size:20" x 25" x 4" fits 4" sewer & drainIndoor air quality is commonly affected by particles such as dust, pet dander, and viruses. BestAir is dedicated to providing a clean and comfortable indoor environment for everyone. We have a complete array of high quality humidification wicks, air cleaning filters, and many other accessories, which will ensure that your indoor air quality will be the BestAir that you and your family can breathe. We are the largest manufacturer of replacement filters