For the most part, the only air filter maintenance is replacing the filter. However, filter maintenance will depend on your unit; consult your owner’s manual. If your system has a reusable filter, you will need to wash it according to the manufacturer’s instructions rather than replace it.
The most important part of air filter maintenance is changing the filter on a regular basis. An air filter’s responsibility is to prevent large dust particles from damaging the equipment inside your heating and cooling system. Depending on the air filter you have installed in your unit it may even trap smaller particles, giving you cleaner indoor air.
The same ductwork and blower motor circulate air during the summer in a central air conditioning unit, which means the air filter must be changed year-round. Monthly checks on your filter will determine how dirty it is or if it’s clogged. Even checking it doesn’t mean you can skip changing it. You should change the filter at least every three months or when the seasons change.
Filter maintenance is extremely important to the lifespan and performance of your system. Failing to check or replace the filter will lead to:
Whether your filter is washable or disposable, it comes with a MERV rating. The MERV rating is the Minimum Efficiency Reporting Value, which rates each filter’s level of efficiency at trapping and eliminating pollutants from your indoor air. The typical MERV ratings are rated below:
Before you decide to upgrade your filter to a high efficiency MERV 16 box or bag filter, consider the problems you might face by switching: