HVAC duct cleaning uses compressed air to agitate dust from duct surfaces while a vacuum collects it. The air must be clean and dry, because the whole point is to remove contamination rather than introduce more.
Key applications
- Air whips and agitation nozzles inside ducts
- Pneumatic brushes and tools
- Negative air machine support
- Cleaning of coils and fans
Air quality
The air used inside ducts must be oil-free and dry, because oil mist or moisture would contaminate the duct surfaces and the occupied space. Use filtration and a dryer on the portable supply, and check the air is clean before starting.
Sizing
Air whips are intermittent but need bursts of flow at moderate pressure. A portable compressor with a receiver smooths the demand, and the machine should be quiet enough for use inside occupied buildings.