Include a visual inspection of your duct system and return air box Remove and clean registers and return grills Hand vacuum and brush the open supply and return ducts using a HEPA filter vac Use a special truck mounted vacuum along with mechanical brushes The brushes vacuum and agitate dust and debris simultaneously Effectively removes dust, pollens, dust mites, dander and other contaminants Sanitizing, Deodorizing, and Sealing of vents available High-Efficiency, permanent, electrostatic air filters available Also available - VIS camera inspection system (see what's in your ducts!)