Mason Cleaning Systems Inc. has been keeping Northern Ontario homes and businesses breathing clean since 1981. Founded by David Mason , we specialize in professional duct cleaning and dryer vent cleaning for residential and commercial properties throughout the North Bay region. We’re not your average cleaning company. While others show up with portable shop-vacs, we bring 220-volt Commercial-grade extraction system removing 99.9% dust/debris that pulls 5,000 cubic feet of air per minute . That’s the difference between blowing dust around and actually extracting it from your home.