What if I don't like my AirDoctor HVAC filter? Selesthe Borbon January 24, 2023 21:35 No problem, we offer a 30 Day money back guarantee (same as every other AirDoctor product). Related articles AirDoctor cost per speed per setting How often do I need to replace my AirDoctor HVAC filter? Do you have a phone number or email I can contact for Customer Service? Does AirDoctor capture mold? How Do You Change Filters? Comments 0 comments Article is closed for comments.