RUN! Today only, April 7th, The Home Depot has Honeywell Air Filter 4-Packs for just $22.99! (regularly $37.29) That is just $5.74 per filter! This is the best way to save on air filters. Stock up now and you can change your filter all year long at a great price! If you aren’t changing your filter every 3 months, you need to! It will extend the life of your furnace and keep your air free of allergens.