After an in depth study and over 20 years experience, we at K.W Duct Cleaning decided not to invest in limited use equipment like electric portable vacuums or converted carpet cleaning attachments. We only use custom built high powered vacuum trucks (20000 CFM) with powerful air compressors. At KW Duct Cleaning we care about the air you breathe. This is why we have the most competitive prices and no hidden fees. We do over the phone quotes or we'll come to your place FREE of charge to give you a quote in person.