Did not meet expectations set by website and reviews. Waited over one month for appointment. Tech put on a good show with drop cloths. booties and corner guards but when all done found that he skipped/missed one return, dust still clumped on walls of main vertical return direct to blower and blower fan still coated in caked dust. Step three in marketing on website and video... remove and clean blower... oops... just another contractor that needs babysitting to do what they say they will do. I will do complete review and finish job with whatever equipment I have. DW was recommended and cost significantly more than other firms. My bad.