What is the Most Common HVAC Air Filter Size?

Currently, the most popular size of air filters is 10x20. But if your system requires custom-sized filters, you can find them in a range of sizes from 8 x 24 x 1 to 25 x 30 x 1.Let's take a look at the most common air filter sizes and where to buy them. The recommended filter size for your unit model can be found in the table titled “Find your air conditioner and oven filter by make, model number and size”. This list includes standard sizes (also known as standard AC and oven filter sizes) as well as hard to find sizes, along with their actual sizes and MERV options.

To make sure that you purchase the correct size filter for your system, you should measure the inside dimensions of the air cleaner inlet. If you're looking for a retailer near you that sells custom-sized air filters, you may have difficulty finding one. HVAC service companies usually provide air filter replacement services, as well as system repair and unit installation services. The Lennox filter below shows part number X0583 and Honeywell part numbers, FC100A1029 and FC35A1001, which this filter can replace on the actual filter (refer to the Lennox filter image below for item number and filter size along with compatible filters).

Forcing a large filter into an area where it doesn't belong can damage the HVAC system and won't clean the air properly. Since HVAC technicians come to your home and evaluate your specific unit, they know what type of filter your oven can handle and what is best for your system. However, while filters offer many advantages for your system, your home, and your health, they need to be changed regularly. If the return grille is in the ceiling, you may want to use a filter that has a slightly larger actual size, so that it doesn't fall on you when you open the vent.

Filters can have a list of models from several manufacturers that are compatible with the filter you need. Changing the HVAC filter is just one part of the routine maintenance you must perform on your system. For many people, air filtration is a confusing topic that is rarely discussed, leaving questions unanswered. It's important to remember that air filters, oven filters, AC filters, and air conditioning filters are all the same thing.

Once you determine the exact dimensions that best fit your needs, place an order for your filter size with the exact fraction or decimal of your preferred measurements.

Cheri Baldinger
Cheri Baldinger

Subtly charming problem solver. Subtly charming twitter expert. Lifelong travel fanatic. Explorer. Extreme social media specialist. Wannabe internet fan.

Leave Message

Required fields are marked *