Ducts move the air a system has already cooled or heated. Leaky, undersized, or aging ducts can show up during a replacement conversation, or during a visit for a comfort complaint. This page does not diagnose your ducts, and it does not invent a price for duct cleaning. We do not have a sourced local price for duct cleaning in the research behind this site, so we do not publish one.
A permissioned photo of an attic or crawl-space duct run in a Montgomery County, Texas home, taken safely and without showing private belongings, or a public-street house exterior if an interior photo is not available. No stock.
Published ranges that include ductwork
- Angi, Houston HVAC replacement, updated April 23, 2026: a complete system with new ductwork $10,000 to $22,000, compared with a standard system replacement average of $7,395 and a typical band of $4,930 to $12,325.
- Angi national AC replacement, updated October 22, 2026: ductwork modifications can add $3,000 to $7,500.
Those figures are estimates from Angi, not a quote for your attic or your house. Ask a visiting licensed contractor to say whether they are talking about a repair, a modification, or a full duct replacement, and to put that scope on a written estimate. Related replacement ranges are on the replacement page and the cost guide.
MoCo AC Repair is a referral service, not a licensed air-conditioning contractor. Any on-site diagnosis and any work are performed by [Partner contractor name TBD]. Partner TACL license number: [TACL number TBD]. Request a visit. Phone: (XXX) XXX-XXXX Phone number coming soon. Calls may be recorded.
Sources cited on this page
- Angi, How Much Does HVAC Replacement Cost in Houston, TX? (updated April 23, 2026)
- Angi, How Much Does AC Replacement Cost? [2026 Data] (updated October 22, 2026)