We've tested and reviewed products since 1936. Read CR's review of the Lennox Healthy Climate CarbonClean 16 air filter to find out if it's worth it.

The air filter in your HVAC system is something you probably don’t think about much because the unit is hidden away in your basement or attic. ... Lennox Healthy Climate CarbonClean 16.

17x26x4 MERV 8 Lennox X6664 Aftermarket Filters (2 Pack) ... Our pleated furnace filters are Made in the USA and offer a high quality replacement air filter option for your air conditioner and/or ...

Our top-rated 5-inch furnace filter is the Lennox Healthy Climate CarbonClean 16, $100. For 1-inch furnace filters, we recommend the Filtrete Healthy Living Ultimate Allergen Reduction 1900 MPR, $20.