When it comes to Merv 8, 11 and 13 filters, it is recommended that you change the filter at least every 3 months for optimal filtration and healthier air in your home. However, if the filter is made of fiberglass, experts suggest changing it every 30 days. Pleated filters, which are more expensive, can last up to three or six months. During peak summer and winter months, when HVAC systems are running at maximum capacity, it is best to replace the filter every 30 days.
The frequency of filter changes also depends on your lifestyle and the type of filter you choose. Many filter manufacturers provide recommendations on how often their product should be replaced. For MERV 3 1, 2 and 4 air filters, they should be changed every 3 months, while MERV 13 whole-house replacement filters should be changed every 6 months. If you have pets, children or allergy sufferers in your space, it is best to change the filter more often.
It is important to replace filters regularly as older filters are less effective at removing bacteria and dirt from the air, leading to poorer indoor air quality and higher energy costs. Changing your air filter is the easiest and most effective way to maintain your home's cooling and heating system. When deciding how often to change an oven filter, consider the type of filter you have chosen. For example, Honeywell Ultra Efficiency filters (available on Amazon) have more pleats which trap dust more effectively and usually require fewer changes - usually every 90 days.
The presence of pets, young children or people with allergies will require you to change the air filter more often. MERV (Minimum Efficiency Report Value) measures the efficiency with which air filters remove particles from the air. A larger home generally requires more frequent filter changes as ovens and air conditioners must release more air for temperature fluctuations. On the other hand, if you live in a smaller house, your air conditioners and ovens need to pump less air for the same amount of temperature change which could mean fewer filter changes. It is important to analyze in detail how often the air filter needs to be changed and choose a type of air filter that meets your needs.
Changing your air filter regularly is one of the most important things you can do to take good care of your HVAC system.