The Air Conditioner:
If you do not suffer from allergies or have pets and do vacuum the dust from the AC frequently you should replace the filter in your AC every 6 months. If you suffer from allergies or have pets, consider replacing every 2-3 months.
Again factors like suffering from allergies or having pets will mean you need to replace your air filter more often, however a good rule of thumb for most HEPA filters is to replace them every 3-6 months (at least once during peak allergy season). Check with the maker of your HEPA unit for details, many have pre-filters that if replaced frequently can extend the life of your HEPA filter.
Fans with Air Filters:
Depending on the make and model of your fan, give it a thorough take apart vacuum cleaning every 4-6 months. Its a good idea to give it a less thorough cleaning of the exterior and blades at least once a month especially if you suffer from allergies or have pets.
How often do you clean or replace your air filter?
For some more air filter tips, check out these posts from our archives:
- A Reminder to Clean/Replace Your Air Purifier Filters
- Tips For Spring Cleaning: Filters to Gadgets
- How Often Should I Replace My AC Air Filter?
(Images: Joelle Alcaidinho)