Duct cleaning: when is it actually useful?
Distinguish real contamination, dusty work, visible debris and marketing claims before paying for whole-system cleaning.
VERT / GREEN
Filter, grilles and normal maintenance may be enough when the system is dry, clean and has no identified contamination.
JAUNE / YELLOW
After dusty construction, infestation or visible deposits, system inspection can justify targeted cleaning.
ROUGE / RED
Active mould, water in ducts, asbestos or claims to “cure” symptoms: correct the cause and use appropriate specialists before cleaning/biocide.
Quick triage
What the professional checks
The HVAC/IAQ specialist inspects contamination, moisture, insulation, filters, coils and causes before recommending a cleaning method.
Official sources
Checked 2026-08-23
Often-overlooked service interfaces
V26 connects systems that cross utility, plumbing, HVAC, envelope and metering boundaries.