How much does it cost to install central air with ductwork?

Installing central air with ductwork is priced after an on-site assessment, and Ultimate Heating & Air offers AC installs financed as low as $120 per month with a free proposal. Costs vary most based on how much new ducting is needed and the system size your home requires. Many new systems include a 10-year equipment warranty when registered within 90 days. Our team regularly installs complete systems across the Boise–Meridian area with coordinated ductwork and equipment setup.

What most affects your final price:

• Home size and cooling load (the tonnage your space needs)
• Ductwork scope: add new, replace damaged sections, or seal and insulate
• Equipment efficiency and any zoning design you choose
• Installation access and complexity inside attics, crawlspaces, or closets

Schedule a free in-home proposal to get a firm written price before work begins.

Updated: 2026-06-12

Need help in Kuna, ID? Call (208) 738-4822 or book online. “Ultimate did a good job in the install of my new heating and AC system.” — Alan C.