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All the air that heats or cools your home passes through your air filter at some point in its journey. That’s why it is so important to change your air filter regularly to prevent dirt, dust and stale air from entering your HVAC system, and your lungs. So how do you know when to change your air filter? Let’s take a look at some telltale signs.

There’s More Dust Floating Around Than Usual

If it seems like the inside of your home is much dustier than usual, the chances are that your filter needs changing. When your filter is full of dust and dirt, it refilters the debris back into your home which you then breathe in. Changing your air filter regularly is essential for people with respiratory issues like asthma.

It’s Taking Longer for Your Home to Cool Down

If your AC unit or heating unit seems to be working overtime and it still isn’t cooling or warming your home quickly, it may be your filter. A dirty filter causes your system to work harder to circulate air through your home.

Your Filter is Dark Grey

When your filter becomes saturated in dust and dirt, it becomes a dark grey color. If you’re not sure when you last changed your filter, but it appears dark grey, change it.

Replacement Time

Of course, you most likely won’t have to look for any of these signs if you change your filter on the timeline laid out in your manual. If you aren’t sure about which filters to use for your system or how often to change them, check with your HVAC technician.

Changing your air filter regularly will keep your HVAC system working properly and efficiently. If you have any questions on which filters to use for your system or need help changing it, call your HVAC repair company.