Finding the Perfect Air Conditioner Filter for Your Home

When the summer heat hits, it's important to have an air conditioner that is running efficiently. To keep your AC in top shape, you need to regularly replace its filters. But how do you know what size AC filter to buy? Read on to find out.

The Importance of Air Conditioner Filters

Air conditioner filters are designed to capture dust, dirt, and other airborne particles that can accumulate in your home's air. This helps keep your air clean and free from allergens and pollutants. Additionally, a clean filter helps your air conditioner run more efficiently, which can save you money on energy bills.

Measuring Your Air Conditioner Filter

Before you can purchase a replacement filter for your AC unit, you need to measure the existing one. The size of the filter will be listed on the side of it or on the manufacturer’s label. If this information is not available, simply measure the length, width, and depth of the filter in inches.

Choosing The Right Filter

Once you have determined the size of your air conditioner filter, it's time to start shopping for a replacement. When selecting a new filter, there are several factors that should be taken into consideration such as MERV rating and type. The MERV rating indicates how effective a filter is at trapping airborne particles; higher ratings indicate better filtration systems while pleated filters are more efficient than fiberglass ones but may need replacing more often.

Where To Buy Air Conditioner Filters

You can purchase air conditioner filters at most hardware stores or online from retailers such as Amazon or eBay. Just make sure that when buying online that you double-check all measurements before making any purchases.


Finding out what size AC filter to buy is an important part of maintaining your air conditioning system. By measuring your existing filter, considering factors such as MERV rating and type, and purchasing from reputable retailers, you can ensure that you get just what you need for optimal performance.