How To Find Furnace Filter Size – Filter Replacement Guide

A furnace filter’s main objective is to capture airborne particles, not improve air quality, but to prevent them from entering your heating and cooling system. If you’re searching, how to find furnace filter size then continue reading the posting. However, because the filter eliminates pollutants for the sake of the system, air quality improves as well.

What are the different sizes of furnace filters? You might wonder if the size of the furnace filter impacts the quality of the air inside the house? The size of a furnace filter also affects energy efficiency and HVAC costs. Commercial air duct and dryer vent cleaning in Alpharetta can help you with these services.

It’s easy to become overwhelmed by all the data and statistics listed on the furnace air filter unit.

The dimensions of furnace filters differ from those of other measurements. Homeowners will have no issue replacing furnace filters at home if they know how to understand them and where to look for them.

Why Should You Know About Your Furnace Filter Size?

Homeowners should always be aware of the dimensions of their furnace filters as it has many benefits:

  1. Buy new furnace filters.
  2. Change your old furnace filters with ease.
  3. Keep a healthy indoor environment.
  4. Keep their furnace and air conditioner in good working order.
  5. Avoids repairs and damages to your HVAC system

Using the incorrect furnace filter size might result in a variety of problems. To safeguard their home comfort, indoor environmental quality and minimize HVAC expenses, homeowners should always utilize the appropriate furnace filter sizes.

How to find Furnace Filter Size?

Furnace Filter size is measured in length, width, and depth. 

Furnace filter sizes are usually always written on the side of the filter. Length x Width x Depth is the standard format. You may notice two distinct sizes of furnace filters when examining them. The first is the standard size, which is represented in digits. 

There’s also the real size, which is usually half an inch less than the standard size. One of the most common furnace filter sizes, for instance, is 20 x 25 x 1 inch. The real furnace filter is 19.5 x 24.25 x 0.75 inches in dimensions.

The Right Furnace Filter Size for You

The most straightforward method for determining furnace filter sizes is to take out the current furnace filter and examine the label.

searching for furnace filter

Check the furnace owner handbook for the instructions if the old furnace filter has already been thrown. Consult with the furnace vendor if you no longer have the user handbook. Ultimately, you can also consult with an HVAC expert.

The furnace filter size depends on the furnace you have. You have a variety of furnace filter sizes to pick from, like Aprilaire, Honeywell. Lennox and Toptech.

Indoor Air Quality

What a furnace filter can do for interior air quality is determined by its depth. Furnace filters come in a variety of depths ranging from one to five inches deep.

You should replace filters with a depth of one inch in a furnace more often. The thicker the furnace filter, the less frequently it needs to be changed. More layers are used in furnace filters with increasing thickness or depth. These other layers serve as additional traps, catching any airborne particles that could have gotten beyond the first layer. 

Consequently, these furnace filter sizes work longer and trap a greater amount of dust. While these are more expensive, they also provide greater services. You can also contact professionals for mold air duct cleaning in Alpharetta to eliminate mold from your home.

Benefits of Using a Thick Furnace Filter

  • It can hold more particles.
  • It does not obstruct airflow.
  • It’s more durable.
  • Energy efficiency
  • Indoor air quality Improvements
  • Air filter maintenance takes less time.
  • A more powerful central air conditioning system

The thicker the furnace filter, the longer you can use it before it needs to be replaced. On average, You should replace furnace filters with a thickness or depth of up to one inch every one to three months. Furnace filters with a four-inch thickness, on the other hand, can last up to a year.

In most cases, the furnace filter size is determined by the furnace. However, homeowners who wish to improve their air filters to a deeper level will need to put in a little more effort.

How to Replace Furnace Filter?

Switch off the Furnace.

Switching off your furnace is the first step towards changing the filter. You should not do any service while the system is running. Furthermore, this process will only take a few moments so that you won’t be missing out on any heating.

Choose the Filter Size You’ll Require

The first step is to figure out what kind of filter you have and want to replace. Remove the old filter, which is located directly within the furnace or inside the air return vent after you’ve switched off your furnace. On the furnace filter, there should be an arrow indicating which way the air flows. Label the airflow path on the outside of the furnace with a marker so you’ll always know how to install the filter correctly.

Put in your new filter.

You’ll see marks on your new furnace filter that will show you which part must be towards the furnace when you install it. Replace the cover over the filter and push it into position. Keep track of when you last changed the filter, so you know when it’s time to do it again.

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