Question: what are best furnace filters?
Answer: AIRx Health 1" MERV 13 Furnace Filters. ... , Honeywell FC100A1037 Ultra Efficiency 4" Furnace Filters. ... , Nordic Pure 4" Furnace Filters. ... , FilterBuy 1" Furnace Filters. ... , AIRx ALLERGY 1" Furnace Filters. ... , Filtrete Micro Allergen 4" Furnace Filters. ... , X6673 Lennox 4" Furnace Filters.