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No matter the Merv rating you choose, we recommend replacing your filters regularly to ensure the quality of your air stays clean and the unit functions properly.

This will depend on the environment as well, such as smoking, pets, etc.

1” filters - replace every 30 days

2” filters - replace every 90 days

4” filters - replace every 6 months to once a year

We also do custom sizes - Just fill in the information in the “Contact Us” section and we will provide the pricing, usually within 24 hours.