Dust and debris buildup in original sheet metal duct
Why it happens here
Historic Main Street buildings often have original sheet metal duct that has been in place for decades. The joints loosen over time, and dust collects in every seam. The dry climate makes the dust finer and more likely to stay airborne.
Our approach
We use a negative air machine to create suction at the trunk line, then work through each branch with a rotary brush system. After cleaning, we seal any loose joints with duct sealant to prevent future leaks.