Need to replace those air filters in the furnace? If so, head over to HomeDepot.com where they’re offering up to 60% off select NaturalAire air filters for as low as $19.06 for a 12-pack, working out to only $1.58 per air filter. To extend the life of your furnace and to keep your home healthier, changing your air filter often is pretty important. This will give you air filters on hand for atleast a year – score! Shipping is free on all orders, or you can choose free in-store pickup as well. Head here to get in on this sale and hurry, as supplies can sell out at anytime.