When Should I Change My Air Conditioner's Air Filter at Home?
Looking for the fast answer? See our FAQ on "How often to change the air filter".
- Determining just how often to change your furnace or air conditioner filter.
- Replacing them at the proper time.
When To Change Your Air Filters
Most filters have a printed "expiration" date on the box or plastic. It may read "Lasts up to 3 months" or "Change filter every 90 days". Pay attention at the store and you'll notice that some are meant to only last a month, while other manufacturers (like Honeywell) have released media air cleaners with filters meant to be exchanged once every 6-12 months. The norm seems to be once every 3 months for most higher quality filters, but we have a rule of thumb that we suggest our readers to go by. If they're dirty, change them! A dirty air filter can contribute or cause damage to costly equipment, like your compressor, so it's best to change it out more often than neglect it. If you want to stick to the manufacturer's recommended limit, we suggest marking the date on the filter when you swap it out, and programming a reminder for yourself in your phone or on a calendar. Also note that your filter manufacturer sometimes has a different recommendation from your HVAC system manufacturer.
Determining how often to change your air filters can depend on several factors:
- The type of air filter you are using
- The collective air quality of your Clearwater area home
- Pets – Cats, dogs, birds, etc.
- Number of people in the home
- General air pollution in the Clearwater area or construction taking place nearby
For your typical 1"-3" air filters, the manufacturers basically say to change them bi-monthly, which is actually a great rule of thumb. Still, generalities may not be suitable for your specific needs. If you have to tolerate light to moderate allergies, you might need to upgrade your air filter or change them even more often than OEM specifications. On the other hand, if you're in a less populated area, own a seldom occupied home (like a vacation home) or an area with few automobiles and trucks, replacing your air filters each year may be quite sufficient. Why should you factor in your pets? They have a tendency to shed, which can clog your air filter quick. Naturally, the air filter is just doing its job by containing pet hair and dander, but extremely dirty filters can cause diminished HVAC performance.
- Seldom used home or single occupant homes without pets or allergies: Change 6-12 months
- Common suburban home without pets: Change every 90 days
- Got a cat or dog: Change every 60 days
- Multiple pets or have allergies: Change every 30-45 days
How To Remember To Change Your Air Conditioner's Air Filters
Midway Services offers a simple solution; sign up for the Service Experts Email Club. This is a great to receive discounts on service, tips and other helpful information directly to your email. Also, your email subscription preferences let’s you set a reminder to change your Clearwater area home's air filter every 30, 60, 90, 120 or 365 days, or any date you find most convenient.
How to replace your return air filter
Most of you know how to replace the air filter in their equipment, but some homes have an extra filter in the return vent. Whether you have one or not is dependent on which HVAC system you have. Your unit is made to handle a certain amount of pressure in your house, and the more filters you have the fiercer the blower motor works, which can reduce the lifespan of your system if it isn't designed for it. Finding out whether you have a return filter and replacing it is simple:
- Locate your return air vents.
- Some covers have screws and some have tabs. Unscrew or pull tabs to pull off the wall.
- Inspect for a filter. If one is there, pull it out and note the size.
- Verify the filter type is the one recommended by the manufacturer.
- If filter is dirty, replace with the manufacturer's recommended filter of the same size and type.