What Are the Typical Costs to Install an HVAC System with Ductwork?

Exact pricing is confirmed after an in‑home evaluation, because total cost depends on your home and the ductwork scope. Costs vary by system type and efficiency, plus duct length, condition, and access. Add‑ons like air purifiers or UV lights change the price. We provide free proposals and financing options, with installs advertised as low as $120 per month. Current promos include $1000 off a new Lennox comfort system. Installations include comprehensive warranty protection. Service available in Tucson, Marana, and Oro Valley. <br/> Updated: 2026-01-05 <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.