should I clean the air filters of my HVAC

How often should I clean the air filters of my HVAC and what cleaning tools should I use to clean it with?
How often should I clean the air filters of my HVAC and what cleaning tools should I use to clean it with?
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Replies
There are permanent and disposable filters. Permanent filters should be cleaned at the beginning of each season (heating and cooling). I just wash mine off. Disposable filters should be checked each season and replaced when necessary or yearly.