How to Find The Right MERV Furnace Filter For Your Home HVAC System MERV furnace filters are at the heart of your HVACs' mechanisms, ensuring the equipment delivers on its intended purpose. MERV furnace filters aren’t complicated; they are among the easiest for the ordinary Joe to replace and understand.... How to Find The Right MERV Furnace Filter For Your Home HVAC System MERV furnace filters are at the heart of your HVACs' mechanisms, ensuring the equipment delivers on its intended purpose. MERV furnace filters aren’t complicated; they are among the easiest for the ordinary Joe to replace and understand....