Had an enquiry from a lady who wants her whole bungalow cleaned with a spec from America. Quite specific with the use of hepa filters being outside and pipes etc passed in through windows. All walls etc to be vacuumed then sprayed with vinegar and damp wiped, then dehumidifier then done again. Has anyone done this sort of clean and any further advice would be appreciated. She has some some of immune illness and can't have any toxic chemicals used in the clean. Thanks in advance.