NFPA 211 requires dryer exhaust systems to be inspected at least annually and cleaned as necessary. The inspection is the requirement. The cleaning follows from what it finds.
The Inspection-Led Programme
For many properties, annual inspection with cleaning triggered by findings is cheaper than cleaning every year by default — and it is fully compliant, because the standard asks for annual inspection, not annual cleaning. Humid-climate, high-usage and high-rise properties generally still need annual cleaning. Your inspection report tells you which you are.
What an Inspection Covers
- Airflow measurement at every unit, or a statistically meaningful sample
- Every exterior termination photographed and assessed — damper operation, corrosion, nesting, screened caps
- Duct material assessment at accessible points
- Transition duct condition at the appliance
- Prioritised findings report ranking buildings by risk
- Dated certificate referencing NFPA 211 for your compliance file
Acquisition Due Diligence
Dryer vents rarely appear on a property condition assessment scope. They should. A 300-unit property whose vents have never been cleaned carries a known cost, an unquantified fire risk, and a documentation gap the seller has no incentive to disclose. An inspection report gives you a price adjustment, a seller-funded escrow, or a known day-one capex item you have priced.
New Construction Inspection
Most defects in new buildings are construction defects, not maintenance items — construction debris, disconnected runs, crushed sections, non-compliant materials. Identifying them within the warranty window means the builder fixes them. Identifying them at year eight means you do.
See also: Inspection Reports | Dryer Vent Repair
Frequently Asked Questions
What does NFPA 211 actually require?
Annual inspection of dryer exhaust systems, with cleaning as necessary. Not annual cleaning by default. That distinction is what makes an inspection-led programme both cheaper and fully compliant.
Can inspection alone keep us compliant?
Yes. The standard asks for annual inspection, and for cleaning where the inspection shows it is needed. For a lower-intensity property in a dry climate, annual inspection with cleaning every 18–24 months is compliant and cheaper than cleaning annually by default.
Do you inspect for acquisition due diligence?
Yes. A pre-close inspection covers every exterior termination, airflow measurement, duct material assessment at accessible points, and a prioritised findings report ranking buildings by risk. It gives you a hard number for the capex model, or a price adjustment.