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Heat Pump Filter Sizes


No matter what filter for heat pump you need, we have it in stock and ready to ship. Choose your filter's width (long side), depth (short side), and thickness using the size selector below. Further below, the Heat Pump Air Filter Sizes chart will help you choose the appropriate size and complete your purchase fast.

Filter Size

Available Heat Pump Filter Sizes and Types

Can't find your size? Click here for Custom Air Filters

All Filter King's Heat Pump Filter Sizes are Proudly Made in the USA

As a US-based air filter manufacturer, Filter King produces and assembles all of its components in a facility in Alabama.

We provide a 30-day money-back guarantee on any furnace filter size because we are so sure of the superior quality of our premium filters. If you contact us within 30 days of your purchase and are unhappy, we'll be happy to provide a refund. Oh, and we offer free shipping when you purchase two or more filter sets.

Subscribe and Save: Buy More, Pay Less

Why get into trouble buying replacement filters every month when you can get us to do it for you? Our simple and scheduled ac and furnace filter delivery service may be what you need.

Swap your ac/furnace filter on time, every time! We have a wide variety of sizes to meet your every need.

Questions about air filter sizes?

Most heat pump filters can be found on the floor, wall, or ceiling, close to the thermostat. However, if you have an interior room or closet with a horizontal or vertical air handler, the air filter frequently fits in a slot at the intake side that the air filter slides into.

For regular 1" filters, we suggest replacing the filter once a month if you use your air conditioner, furnace, or heat pump daily. You can change the filter once every six weeks or every two to three months during milder seasons.

Three main measurements are used to indicate the size of a heat pump filter. A Filter King brand filter's cardboard edge has little numbers printed along it that indicate the filter's length, width, and depth. Other filters, however, might not have this information readily available, and you might have to look for the measures yourself. When doing so, look to see if the filter is square. If it isn't square, the measurement for the smallest size side comes first, then the next, and lastly, the depth measurement. The proper size is demonstrated by the dimensions 10x15x1. When ordering new air filters, round the measurements up to the nearest whole number from the actual sizes. This rounded measurement is the nominal size and is used to match the right filter to its fitting air filter slot. Using the nominal size, you can order a new heat pump filter that easily slides in and out of place.