All furnace filters have a MERV rating which indicates filter efficiency. … The makeup of these high-efficiency filters can be too restrictive for the unit, creating a barrier to good airflow. The HVAC system may struggle to pass air through the air filter and expend more energy in its attempts.
Can air filters be too restrictive?
Burnt out motors and controls can result from too-restrictive filters. Coils, motors, and blowers can also easily become clogged by weak filters creating higher fan usage resulting in higher energy costs.
Do higher MERV filters restrict airflow?
While the highest MERV ratings are the most effective for air quality, they can harm your HVAC system. A higher MERV rating means a higher resistance, which means less airflow.
Is a MERV 11 filter too restrictive?
Air filters with higher MERV ratings can filter more, but the thickness of the filter material can restrict airflow. Restricted airflow can decrease comfort, increase energy use, and accelerate the wear and tear of HVAC components. … In most cases, a MERV 11 air filter isn’t too high for residential use.
Do furnace filters restrict airflow?
“A dirty filter will slow down air flow and make the system work harder to keep you warm or cool—wasting energy. A clean filter will also prevent dust and dirt from building up in the system — leading to expensive maintenance and/or early system failure.”
Is MERV 13 too high for residential?
One factor to consider is air flow through the system. … In some cases, using an air filter that is too restrictive for your system may cause low air flow problems as well. MERV 13 is the highest MERV value safe for residential furnaces; the higher ratings are used primarily in commercial units.
Is MERV 14 too high?
MERV 14 is too strong for most home HVAC systems.
And these are some of the best on the market. … MERV is an industry-standard, or rating. The abbreviation stands for Minimum Effective Reporting Value. In other words, it’s a measurement showing how small the holes are in the filter.