Service illustration · not a completed customer projectTHE WORK, EXPLAINED
Start with the condition.
Understand the scope.
Ask which product, purpose, label-authorized use and system material are involved before considering a proposed chemical treatment. EPA does not recommend routine sealant use and identifies unresolved questions about these treatments. Request an explanation of alternatives, prerequisites and limitations from the responsible professional; this service guide is not product approval.
What may be involved
- product label
- duct material
- documented condition
- written justification
Ask the provider to distinguish existing parts to inspect, proposed replacements, and tools, materials or reports included in the service. Confirm the work and exclusions after assessment; this list does not mean that every item will be supplied or replaced.
LOCAL RESEARCH / Belle Isle
Local context
The EPA does not recommend that air ducts be cleaned routinely, but only as needed, and names three situations where cleaning may be appropriate: substantial visible mold growth inside hard-surface ducts or on other components, ducts infested with vermin, and ducts clogged with excessive dust and debris where particles are actually released into the home. The EPA also notes that no chemical biocides are currently registered for use in internally-insulated air duct systems, and does not recommend routine use of sealants to encapsulate contaminants. Ask which of those conditions was observed before agreeing to any work.
Source ↗Area-wide context does not establish the condition of your property or equipment.
Before the visit
Building age and weather cannot establish duct contamination. The system itself needs to be inspected.
