What are the Most Common Furnace Filter Sizes?

Are you looking for the right furnace filter size for your home? It can be tricky to find the right size, but don't worry - we've got you covered. Let's take a look at the most common furnace filter sizes and where to buy them. The nominal size of one of the most popular furnace filter sizes is 20 x 25 x 1 inch. The actual size of the furnace filter measures 19.5 x 24.25 x 0.75 inches.

It may sound easy to find a “standard air filter size”, but it's not always that simple when you arrive at the store. It's important to make sure that the filter fits properly - it doesn't need to be a “tight seal”, but it should be easy to install and uninstall. Heating and air conditioning technicians can help you determine the best furnace filter size for your home, based on your goals, indoor air quality, and lifestyle. If you don't have the old filter anymore, refer to your furnace user's manual for this information.

Making these technical adjustments means that your furnace can contain larger and stronger filters to improve indoor air quality and energy efficiency. The easiest way to find the right furnace filter size is to remove the existing filter and check the label. If it isn't, you can measure the existing filter (assuming it's the right size) to determine what you need. Filter King offers hundreds of different filter sizes that can be used in various home systems, including furnaces.

They are seven times better than a standard filter for removing dust and other particles and have a longer service life than other filters (up to two more years).

Mary Swopshire
Mary Swopshire

Friendly beer aficionado. Tv nerd. Hipster-friendly writer. Friendly internet specialist. Professional beer maven. Extreme twitter guru.

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