Furnace Filter Change Frequency

Merv 8 filters should be changed every 3 4 months merv 10 11 filters every 6 months and merv 16 filters every year.

Furnace filter change frequency.

A good rule of thumb is to change 1 2 inch filters every three months 4 inch filters every six months and 5 inch filters every 12 months. The longer the filter is in place the more dirt dust and allergens are trapped clogging the filter and decreasing their efficiency. Usually 30 days is on the low end and up to 12 months on the higher end. Staying on top of furnace filter changes will positively affect the health of your family and your hvac system by improving your indoor air quality.

Fiberglass filters are a lower cost option but they need to be disposed of and replaced roughly every 30 days. As a general rule you ll want to replace pleated air filters and furnace filters in your home every 90 days. Standard 1 inch filters need to be changed every 1 to 3 months while high efficiency filters should be changed approximately every 6 to 9 months. As your filter traps more dirt dust and allergens from the air filter efficiency decreases.

Though you don t have to change your furnace filter every single month it should be changed every three months at most as the seasons change. A general rule of thumb for pleated air filters like ones made by filterbuy is to replace your filter every 90 days. Signs your air filter needs changed. The filter is visibly dirty.

Don t wait for it to completely clog before you change it doing so means you ll pay higher energy bills and risk expensive furnace repairs. Does someone in your home have asthma and or allergies. When in doubt we suggest that you check the filter to see if it is truly dirty. Your furnace s owner s manual will specify the best merv rating for your furnace and in general filters with a merv rating of 6 through 9 should be changed every 90 days while those with a merv.

Now you have to keep in mind these are averages or good rules of thumb to go on but there are many factors that can actually increase how often you should change them more frequently than the recommended time frames. Find out below if you should be replacing your filter more often. When to change an air filter. Our very general suggestion is to check your air filter every 1 to 3 months and change it when there s a thin layer of dirt on the filter.