Ductwork and Ventilation

Miamisburg, United StatesHealth 53/100

Aeroseal is the leading patented aerosol-based duct sealing technology company, headquartered in Miamisburg, Ohio. Originally developed at the Lawrence Berkeley National Laboratory and named one of the Department of Energy's top 25 innovations of the past 25 years, Aeroseal reduces duct leakage by up to 90% by sealing leaks from the inside using a non-toxic sealant injected into pressurized ductwork. For over 20 years, Aeroseal has improved hundreds of thousands of homes, hospitals, hotels, universities, and commercial buildings through its certified dealer network, offering a 10-year warranty on sealed duct systems.

Kelowna, CanadaHealth 53/100

Modern Purair is Canada's largest indoor air quality and duct cleaning franchise network, headquartered in Kelowna, British Columbia, with franchise locations across Canada. The company provides residential and commercial air duct cleaning, furnace cleaning, dryer vent cleaning, AC coil cleaning, and indoor air quality testing using a proprietary Power-Vac process. Modern Purair is certified by the National Air Duct Cleaners Association (NADCA) and services homes, offices, schools, healthcare facilities, and commercial properties throughout British Columbia, Alberta, Saskatchewan, Manitoba, and Ontario.