I live in Florida and have mold allergies. Multiple times my 2008 Sienna van has a bad AC smell develop which makes me cough my head off. The dealer has cleaned the evaporator and ducts and the problem gets better but returns.
I read on this site that I should not use MAX and the recycle air setting so much as it prevents fresh air from drying out the evaporator and tubing. I also read I should let the system run fresh air without AC for a few minutes before turning off engine.
My old Volvo wagon had a fan motor that came on for a while after the engine stopped. I thought it was a malfunction but the dealer said it was to dry out the AC.
All that understood - when it comes time to buy a new car:
Which car manufacturers, other than Volvo, have added some kind of mold prevention to the AC system?