Questions covered in this guide
Ask why cleaning is being recommended
Request the observed condition, location and supporting photographs or report. Separate a specific concern from a coupon or a general schedule. If a provider describes contamination or damage, ask how it was identified and whether another qualified assessment is needed. Keep the reason for the service visible before discussing add-ons or a whole-system replacement.
Use EPA’s guidance to frame the questions
EPA recommends duct cleaning on an as-needed basis. It cautions against claims that cleaners are EPA-certified. Ask the provider to explain how its proposed work addresses your documented condition. Do not treat a certification-sounding phrase as evidence of government endorsement. Verify the actual qualifications and scope being offered rather than assuming a familiar logo or technical term establishes the need for service.
Compare the complete cleaning proposal
Make rows for areas included, access, protection of occupied rooms, equipment components included, proposed chemicals, waste handling and final documentation. Ask whether damaged duct materials or an underlying moisture issue need a different correction. Request written product information and the reason for any chemical treatment before agreeing to it. Keep repair, sealing and cleaning as separate work items so they can be compared. Ask how the provider will show that the agreed work is complete and what remains unresolved.
Keep costs tied to a defined task
Request an installed-service total and clear conditions for additional charges. Save the before-and-after records and any separate recommendations. The HVAC calculator can help organize a replacement scenario, but it has no duct-cleaning price or health-benefit model. Evaluate this purchase as a documented service for a specific condition, without assuming it will cure symptoms, remove every pollutant or produce a particular energy saving.
Sources and supported claims
EPA recommends duct cleaning on an as-needed basis.
Source ↗ · national · Checked 2026-10-12
It cautions against claims that cleaners are EPA-certified.
Source ↗ · national · Checked 2026-10-12
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