What negative air machine means
A negative air machine is a powerful fan with filters that pulls air out of the duct system, or a work area, so loosened dust is drawn into the machine instead of into the house.
Also called negative pressure, HEPA collector.
Where it matters on a duct and dryer vent cleaning job
Under negative pressure, agitation tools can break dust loose without blowing it into rooms. It is the main thing that separates a proper duct cleaning from a quick vacuum, and worth showing the customer on site.
What it costs
Koira's air duct cleaning cost guide puts a typical job at $400, with most between $300 to $700. The guide shows its sources and what moves the price. The air duct cleaning cost calculator prices a job line by line.
Work it out
- Free calculator: Air duct cleaning cost calculator
- Cost guide: Air duct cleaning cost
- Tools, templates and guides: Free duct and dryer vent cleaning resources