If you're not sure what size filter you need for your air conditioning system, it's important to check the manufacturer's specifications or ask your HVAC technician for help. An incorrectly sized filter can cause it to bend, damage it, or reduce its ability to function properly. If the filter is too small, it won't cover the entire space and may allow dust and dirt to pass through. On the other hand, if the filter is too large, the frame will wrinkle, airflow will be restricted, and longevity will be compromised.
Restricted airflow also impairs the longevity of the air conditioning system and increases utility bills. The furnace filters must fit securely, but there is no need to force them to be put in place. If you have to force the filter into its slot, it's probably too big. Some HVAC units may need a filter with unique or unusual dimensions and in these cases, it is necessary to request a custom filter. When you buy your air filter online, the most important thing to know is that air filters come in two sizes and you must understand the nominal size (which is a round size often used to label the filter) and the actual size.
Measure it yourself if the dimensions are too blurry to read or there's no air filter you can see. No matter what type of filter works best with your system, it's important to change or clean it as needed to maintain healthy air quality in your home. Here's an interesting fact: 70% of what Filterbuy sells isn't included in the 10 most common air filter sizes. I always order my heat pump filters from Atomic Filters, because they have exactly the filters I want, their website works great and the filters come very quickly and in perfect condition. The most common air filters are made of spun fiberglass, pleated paper or polyester fibers, and electrostatic pleats. Using the wrong air filter can cause numerous problems with the air conditioning system, including a decrease in indoor air quality.
So what do you do when you have the wrong size air filter? The only solution is to find the right size.
How to Find the Right Size Air FilterAs an expert in HVAC systems, I recommend that homeowners take a few steps when looking for an air filter that fits their system correctly. First, check your manufacturer's specifications for your unit's exact size requirements. If you don't have access to this information, measure your current filter and compare it with available options online. It's also important to consider what type of filter works best with your system.
Spun fiberglass filters are usually used for basic filtration needs while pleated paper or polyester fibers are better for capturing smaller particles like dust mites and pet dander. Electrostatic pleats are ideal for trapping smoke particles and other allergens. Finally, if you can't find a standard-sized filter that fits your unit, consider ordering a custom-made one from a reputable supplier like Atomic Filters. They offer a wide selection of sizes and types of filters that can be tailored to fit any HVAC system.