Do you know how often your home’s HVAC filter should be changed? Our experienced trainers are answering this question in our Ask a Trainer video series!

Most heating and air conditioning systems use a standard one-inch filter, but your system might instead have a four- to five-inch filter, depending on the filtration efficiency. For most standard HVAC filters, a good rule of thumb is to replace them every 60 to 90 days.

Some homeowners who suffer from allergies or other health concerns may choose to change their filters monthly. If your system uses a thicker five-inch filter, these can last up to twelve months. But you’ll still need to check these larger filters regularly for the best results.

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