When it comes to selecting the right air filter for your furnace or air conditioning unit, there are a few key points to consider. Recent advances in air filter technology have enabled high MERV ratings (11 to 1) with a low pressure drop, meaning that filters don't need to be hermetically sealed. However, it's still important to be able to install and uninstall the filter quickly and without any issues. Most air conditioning and HVAC units use standard-sized filters, but some require the purchase and installation of a custom-sized air filter. To make an informed decision about which type of air conditioner filter is best for your home, you'll need to understand the different types of air filter technology, as well as the advantages and disadvantages of each type.
Generally, you won't be able to find the size of air filter you need at your local home improvement store. If you can't find the Nordic Pure in your size, or if you prefer to buy and pick up a new filter immediately at a store, Honeywell FPR 9 filters and Filtrete MPR 1500 filters are similar and widely available at retail stores. If your air conditioning system uses a thicker filter (typically 4 to 5 inches and usually mounted on the air controller), it's likely designed specifically for medium-efficiency MERV filtration. These filters usually cost more than basic fiberglass filters, but they also provide more protection against airborne particles. During a wildfire, you'll need to change filters more often than usual, and there are some indicators that can help you know when it's time to replace one. Finally, it's important to note that an HVAC filter cannot be considered a HEPA filter unless it consistently filters at least 99.97 percent of all particles that are 0.3 microns or larger.
This is why it's essential to choose the right type of filter for your home.
