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How often should you change your HVAC air filter?

It is recommended to change the air filter at home every 30 days when using cheaper glassic fiber filters. Folded high-end filters can last up to 6 months, but these typical guidelines require medium use and do not take into account the size and type of filter.When using less expensive fiberglass filters, it's a good idea to change your air filter every 30 days. These guidelines assume average use and don't take into account the size and type of filter, so high-end filters can last as long as 6 months.

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