We just had a company in to clean our house's warm and cold forced air ducts, plus the furnace air system as well. Because it is hard to see if they have cleaned all the duct/debris from the ductwork, it's tough to judge if it is indeed clean afterwards. They used a big suction hose to suck out the dust as they loosened it at each register with compressed air. They also drilled three access holes to run a "skipper" into the cold air return system. The skipper was just a hose with a blunt air nozzle on the end, which was fed into the ductwork through the drilled access holes. I'm not totally convinced it as clean as we had hope for. Like I said before, it's tough to evaluate what you can't see.
Do some companies actually use a scrubbing system to clean the ducts? Anyone have comments??
Cory Regina, Sask.