What Size House Filter Do I Need? A Comprehensive Guide

Air filter sizes can be intimidating, especially when many homes have several filters of different sizes. But don't worry, Second Nature is here to make buying filters easy. Once you enter your filter sizes with us just once, not only do you not have to remember when it's time to change them, but you'll no longer need to remember those complicated sizes. The first step in finding the right size air filter is to measure the length and width (L x W).

If the filter is not a square, the smallest measurement comes first. Most air filters have their size printed on the side of the frame. The length, width and depth of the filter are measured in inches. For example, you'll say something like “16x25x1”, where 16 is the length, 25 is the width, and 1 is the depth.A higher MERV rating means that an air filter is more effective at removing smaller particles from the air.

The size of the pleated air filter is always presented in a chain of three numbers, where the first number represents the length, the second number represents the width and the last number represents the thickness.Replacing your oven filter in a timely manner is much easier when you know what size air filter you need. If you're looking for a store near you that sells custom-sized air filters, you might have a hard time getting lucky. You can also scroll down and use the air filter size chart to choose the right size and pay quickly.If the filter is too large, it won't fit in the filter slot and you won't be able to replace the cover. However, according to Energy Star, filters must be changed every month during peak summer and winter months when your HVAC system is operating at full capacity.The first (and easiest) way to find out the size of your oven filter is to check the size of your old air filter.

The gaps will allow dust, dirt and germs to bypass the filter and potentially re-circulate to the air in your home. If the filter is not the right size, either too small or too large, air will flow around the filter rather than through it and, as a result, not all the air will be filtered.Regulated, improperly sized or installed filter frames can cause air leaks, significantly reducing filter efficiency. This rounded measurement is called nominal size and is used to match the correct filter to its corresponding air filter slot.There are many options for buying air filters with convenience - either online, through your HVAC service company or in-store. From filtering harmful contaminants to keeping your HVAC unit running efficiently, these products have several benefits.

Now that you know how to measure your air filters and what size you need for your home, it's time to get shopping! With Second Nature's easy-to-use website and convenient delivery options, you can find exactly what you need without ever leaving your home.