Home Dealnews 3M Filtrete Allergen Defense HVAC Filter 3-Pack for $16 + free shipping... Dealnews 3M Filtrete Allergen Defense HVAC Filter 3-Pack for $16 + free shipping w/ $35 By ARCOM - 26 March 2020 93 0 SHARE Facebook Twitter Go to the deal page: 3M Filtrete Allergen Defense HVAC Filter 3-Pack for $16 + free shipping w/ $35