Filters block out the particles we don’t want to breathe and improves the air quality inside our homes. Would you visit a place where you knew you’d breathe in large amounts of pollen, dust mites, or pet dander? Most of us wouldn’t.īut without an adequately MERV rated furnace filter, that’s exactly what you’ll be doing in your own home. Here’s why furnace filters are so important. And if you’ve been using the wrong filters for a while, the next replacement could be the straw that breaks the camel’s back. Remembering to change the filter every three months is great, but replacing it every three months with one that improves the furnace’s efficiency is even better.Ī subpar filter won’t do your furnace any favors. Filter replacements are one of the simplest ways to keep your furnace in top-notch shape. If you’re not ready to shell out anywhere from $2,000 to $6,000 for a new furnace, you should be maintaining it consistently. It’s easy to jot down your current filter size and grab the first one you see, but if you’re getting one with the wrong rating, you can actually end up damaging your furnace.Ī tiny part you replace every three months (or whenever you remember to do it – we’re not judging) can’t matter all that much, can it? Unfortunately, it really can. Different MERV ratings, filter types, sizes, and brands are available. Your furnace filter should be changed every three months, and when it’s time to buy a new filter, the options can be confusing. You may have heard about a MERV rating, but how does it affect what type of furnace filter you buy? We’ll explain this and more in greater detail below.
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