The insured technicians from National Duct Cleaning Services maintain indoor air quality with a full spread of residential and commercial tune-ups. Equally comfortable with cleansing vents in studio apartments or shopping complexes, they continually upgrade their skills with additional training and wield HEPA-filtered cleaning units. The interior treatments dislodge particulate debris and banish flourishing colonies of microorganisms, which can create unseemly odors, speed up corrosion, and give furnaces thermostat-raising fevers. After each cleaning, the technician will accompany clients on a visual inspection, occasionally using before-and-after digital photos of the vents to illustrate the results.