The phone rings and it’s the general contractor from a job where you performed ductwork fabrication and installation over four months ago.
Duct systems leak. HVAC construction contractors, duct manufacturers and sheet metal products manufacturers have always acknowledged that duct systems are not 100 percent airtight.
When can a contractor say a duct cleaning job is done? After the coils are cleaned, the blower brushed out and the dirt and debris vacuumed out? Nope.