The general recommendation is that oven filters should be replaced at least every 90 days. But how often do homeowners need to change their air filters to receive full benefits? It really depends on the house and personal preferences. Generally, since 20 x 25 x 5 air filters are stronger than most air filters, most homeowners only use two to three 20 x 25 x 5 air filters per year. Compared to one-inch air filters that need to be changed monthly, air filters require extremely low maintenance.
The most important thing to remember about air filters is to change them regularly. In general, it is recommended that residential air filters be changed every 30 days when using regular fiberglass filters. During a remodeling project, the oven filter should be changed every 30 days, or even more frequently, to prevent building-related dust from circulating around the house. If you're a pet owner, you'll want to change your air filter every 2 months, especially when winter turns to spring and summer to fall.
If you live in a temperate climate and only use your air conditioner or boiler for a few hours a day, a filter could last an entire season or up to an entire year. Because of their folds, filters such as the Honeywell Ultra Efficiency filter (also available on Amazon) have more square inches of space to trap dust, so they usually require fewer changes, usually every 90 days. One of the most important things you can do on your own to take good care of your air conditioning system is to simply change your air filter regularly. If you only have one smoker in the house, you can get away with changing a one-inch or two-inch filter every two months, a four-inch filter every four months, and a five-inch filter every six months.
AllergiesIf someone in your household has allergies, you'll benefit from more frequent air filter changes. Keeping new filters in your oven will help ensure that the oven runs smoothly and efficiently and, most importantly, that the air you and your family breathe in is as clean as possible. Filters that normally last 90 days should be changed every 30 days during the peak summer and winter months. In addition, depending on the season, you may need to change the filter more during the hotter months, as animals lose more hair when it's hot.
If you live in a “smaller house”, your air conditioners and ovens must pump less air with the same temperature change, which could mean fewer filter changes.