HVAC units are powerful machines. They operate by drawing in air from inside residential or commercial buildings, process it through hot or cold HVAC units, then send the air throughout the homes they’re a part of. One of all HVAC units’ most important parts is the air filter. Without a filter to catch dust, hairs, pet dander, and other tiny pieces of stuff, HVAC units don’t operate very long, at full capacity, or reliably. Most people change their air filters out every year. However, it’s always a good idea to check the viability of each filter by visually checking it on a monthly basis.

Not have the time to bother with changing air filters? Do you have trouble switching them out? Maybe you simply don’t want to spend money – are any of these reasons familiar to you? Here are several ways to tell it’s time to change your HVAC filter.

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Are your allergies or asthma acting up?

Tons of Americans suffer from regular allergy problems or asthma. While exposing one’s self to the things they’re allergic to over time is one way to cut down on the severity of their breathing problems, this exposure should never come as a result of dirty air filters.

How does this year’s utility bill look compared to last year’s?

Electricity bills aren’t ever going to be exactly the same due to swings in usage, energy prices, and market demand. However, if your current electricity bill is significantly higher than what it was 12 months ago, check on buying some new HVAC filters.

Do you have a dusty floor?

If you haven’t cleaned in a while, of course you’re going to have a dusty floor! However, floors that accumulate noticeable layers of dust within an hour after cleaning them are most likely an indication of dirty air filters – or just a dirty house.

To make sure your HVAC unit is running as intended, look into buying a new air filter, HVAC air filter housing, and other HVAC tune-up products.