High efficiency filters have denser media. Denser media means the air flower across the filter is reduced or the fan motor on the unit has to work harder to pull air into the system. High efficiency filters with a MERV rating of 13 or above may actually be detrimental to home systems, harming the fan motor by forcing it to work harder. MERV 13 or above filters are generally found in industrial, hospital and other commercial settings where larger units mean stronger fans capable of moving air through a dense material.
All of this goes to say that although high efficiency filters do a good job of filtering out particles, they may not always be the best choice for your particular system. A filter with a MERV rating of 7 to 13 is probably a good choice for most homes. It will filter out the majority of airborne particle effectively without putting stress or strain on the motor. In an industrial setting, you may want to go with the higher MERV rating, depending on the unit, the circumstances and the particles you need to filter from the air. Choosing the right filter is almost always a balancing act between the function of the filter and the effect it has on the entire system. It’s not always a conversation just about the filter itself, but often about other parts in the system affected by the changes in air flow caused by different filters.
If you’re not sure which filter to buy, talk to the experts at Twin City Filter. We have over 70 years of experience with all types of filters. We serve customers in Minnesota, Wisconsin, Iowa, South Dakota and North Dakota. Twin City Filter may be reached at (612) 721-4000.