How Much Does HVAC Installation Cost With Ductwork Included?

Russett Southwest HVAC installation with ductwork is quoted after an on-site evaluation, because final cost depends on system size, duct design, and how accessible your attic or crawlspace is. The duct scope usually drives the biggest swings in price since more runs, tighter spaces, and sealing requirements add labor and materials. We regularly complete full-system and duct projects across the Tucson area, so we account for desert attic conditions that can change install time. If ducts are leaky but structurally sound, targeted repairs or sealing may be more cost‑effective than full replacement; if undersized or damaged, replacement is the better path. Financing is available, with select installations advertised as low as $120/month and a free proposal.

What typically affects your total:

• Home load and equipment tonnage selection
• Total duct length, number of supply/return runs, and register count
• Attic or crawlspace access, insulation, and required sealing or supports
• Add‑ons like zoning or indoor air quality upgrades

Schedule an in‑home assessment to get a firm, written proposal for your exact home. <br/> Updated: 2026-05-09 <br/> Need help in Tucson, AZ? Call 520-200-5869 or book online. "I had an excellent experience with Russett Southwest for my HVAC installation." — Liz C.