How Much Does It Cost To Install Central Air Conditioning?

Central air conditioning installation cost varies by home and system needs; Ultimate Heating & Air offers a Free Proposal and financing for A/C installs as low as $120 per month. The biggest cost drivers are matching system size to your home, any duct changes, and the efficiency rating you choose. If your current unit is 10–15 years old and needs frequent repairs, replacement often pencils out over another major fix. We install systems across the Treasure Valley and often work with homeowners in and around Nampa. A correctly sized unit usually runs quieter and avoids hot‑and‑cold swings that oversized systems create.

What to expect from our Free Proposal:

• In‑home assessment of cooling needs and duct condition
• Personalized equipment options and efficiency choices
• Clear recommendations with available financing

Schedule a Free Proposal to confirm an exact price after an on‑site evaluation.

Updated: 2026-08-22

Need help in Nampa, ID? Call (208) 738-4822 or book online. “Great service. Fair prices. Worked us in to their busy schedule to get the AC in less than 24 hours.” — Britney Journee