How much does central air installation cost with existing ductwork?
Central air installation with existing ductwork is priced after an in-home proposal from Ultimate Heating & Air because the total cost depends on your equipment and site conditions. The biggest driver is the system size and efficiency needed to cool your square footage and layout. When ducts are usable, most of the budget shifts to the condenser, indoor coil, refrigerant lines, and any electrical or control updates. We offer a free on-site proposal and financing options, and our team frequently installs systems in the Kuna area.
Key factors that change price:
- Tonnage and SEER2 rating
- Line-set length or reroute
- Thermostat or control upgrades
- Access, rigging, and pad work
Schedule a free on-site proposal to receive a firm, written price for your home.
Updated: 2026-07-24
Need help in Kuna, ID? Call (208) 738-4822 or book online.
Sources 12
- Free Proposal included with A/C Install.ultimateheatingandair.com
- Gas Line Install + Free Proposal - $79/mo. Same Day Service Guaranteeultimateheatingandair.com
- $120/mo A/C Install + Free Proposalultimateheatingandair.com
- Gas Line Install - Financing Options Available! 100% satisfaction guaranteed. NO service call fees. NO dispatch fees.ultimateheatingandair.com
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