What if I don't like my AirDoctor HVAC filter? January 24, 2023 21:35 No problem, we offer a 30 Day money back guarantee (same as every other AirDoctor product). Related articles What is your return policy? AirDoctor cost per speed per setting Can I clean my Pre-Filter? How much do replacement filters cost? How often do I need to replace my AirDoctor HVAC filter?