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What Filter Size is Right for Me?

Size doesn’t always matter, but in the case of your air filter – it really does. If you select the wrong size filter, your AC unit will not keep out the harmful pollutants you don’t want to breathe in.

What Filter Size is Right for Me

The most common sizes are: 10 X 20 X 1’’, 14 X 20 X 1’’, 16 X 24 X 1’’, 18 X 30 X 1”. And luckily, there is an easy way to measure what size is right for you. 

But What Do the Measurements Correspond To? 

Let’s get right down to it. If a filter labeled 10” X  20” X 1” is 10 inches long, 20 inches wide, and one inch deep. Sounds simple enough right? The only issue is there are two types of measurements when it comes to air filters: the actual size and the nominal size. 

The actual size is exactly what it sounds like – but the nominal size is a rounded up estimation that many brands use to keep consistent. Generally, both measurements will do the job even if they are slightly different. 

How to Know It’s the Right Size

You will know quickly whether your filter is the right size. Upon installation, if you have to force it or bend it at all – it’s the wrong size. If it fits fine on insertion but you notice a loud rattle or an overnight increase in dust – it’s the wrong size. 

Once you find the size that works for you, make sure to swap out the filter every 60 days to keep you and your family breathing right! 

If all else fails, our AC replacement experts in the Greater Phoenix area have the knowledge and skill needed to guide you through any air conditioning service problem. From selecting the right air filter and other products to services to installing your new AC unit, we are here for you, proudly serving Avondale, Buckeye, Glendale, Goodyear, Peoria, Phoenix, Waddell, Scottsdale, and Surprise, Arizona. Contact A Quality HVAC and give us a call at 623-853-1482 today!

Customer Testimonials

“Manny came to repair my air conditioner. It took several procedures and he finally replaced my new motor. It seems to be doing the trick. He also put in a new thermostat . Mine was 21 years old so it was time. He was pleasant and easy to work with; answered all my questions, and there were a lot, until I understood. I would recommend this company and this tech unconditionally!!!” - Midge Abel
“Jason was pleasant, professional, and helpful. He clearly talked about my options and answered all my questions. I’d gladly do business with him again.” - Katrine Cady
“Our upstairs AC stopped working yesterday and I chose this business because of their 5 star reviews. They did not disappoint. Rachel was amazing. She is not only friendly but she is very professional. She was ready to send someone out within an hour! John came out and was very knowledgeable, professional and above all, honest. You don’t see that very often anymore. I will definitely come to them for my future AC/Heater needs.” - Heidi Hedina

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    Areas we serve

    • Astoria Mountain Ranch
    • Sun City
    • Phoenix
    • Waddell
    • Anthem
    • Avondale
    • Buckeye
    • Peoria
    • Scottsdale
    • Glendale
    • Surprise
    • Goodyear

    623-253-3802