Maintaining Your Home Comfort with Air Filters

Having a quality air filter in your home is essential for keeping the air you breathe clean and comfortable. But how often should you change your air filter? This depends on several factors, such as the type of filter you use, the size of your home, and the environment in which you live.

The Advantages of Replacing Your Air Filter Regularly

Regularly replacing your air filter can help keep your HVAC system running efficiently. A dirty air filter restricts airflow and makes it more difficult for your system to cool or heat your home, resulting in higher energy bills. Additionally, a dirty air filter can reduce the quality of indoor air by trapping dust, pollen, pet dander, and other allergens that can aggravate allergies and asthma symptoms.

Types of Air Filters

There are various types of filters available on the market today. Disposable fiberglass filters are inexpensive but don't offer much filtration; they are made from spun fibers that trap large particles like dust and dirt. Pleated filters have a larger surface area for trapping particles like pet dander and mold spores; they're more expensive but last longer than fiberglass filters. High-efficiency particulate air (HEPA) filters are the most effective type as they can trap particles as small as 0.3 microns; these filters remove 99.97% of airborne particles from the air.

How Often Should You Replace Your Air Filter?

In general, it's recommended that you replace your air filter every three months to ensure optimal performance from your HVAC system. If you live in an area with high levels of pollution or if there are pets in your home, it's best to replace it every two months instead; those with allergies or asthma may want to replace their filter even more frequently.


Keeping up with regular maintenance on your home's HVAC system is important for maintaining good indoor air quality and efficient operation. The frequency at which you should replace an old or dirty air filter depends on several factors including type of filter used, size of house, and environment. In general, it is recommended that one replaces their filter every three months. However, those living in areas with high levels of pollution or who have pets may need to replace their filters more often. Those suffering from allergies or asthma should also consider replacing their filters more frequently.