Furnace Filter Change Interval

When to change an air filter the frequency at which your air filter should be changed depends on a variety of factors including the type of filter in your hvac unit.

Furnace filter change interval.

How the usage of your hvac system affects your air filter change interval. 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. The long standing rule of thumb on furnace filters is to change them every month. Fiberglass filters are a lower cost option but they need to be disposed of and replaced roughly every 30 days.

Keep this in mind during the hottest and coldest months of the year because you ll probably need to change your air filter more frequently during those times. There is no substitute for the analysis of a true expert. So be sure that your furnace filter is switched out at the start of winter fall spring and summer. The general rule is to change a furnace filter usually located behind a return air vent or in a slot on the furnace itself at least once every 90 days.

This is good practice if you are using older fiberglass filters but for newer more efficient filters you should do it a little differently. These should be inspected and cleaned at least once a month but you may need to replace them that frequently also. These estimates assume average use and take into account the type and size of your filter. Typical recommendations range from every 30 days for cheaper fiberglass filters which often don t do a great job of filtering to as long as 6 months for higher end pleated filters.

Depending on your lifestyle and the type of. That means that the more you use your hvac system the quicker your filter will get dirty.