How much does it cost to install a new AC and furnace?

The cost to install a new AC and furnace is confirmed after an in-home evaluation because price depends on matched system capacity, efficiency rating, and any duct or utility changes needed. Most homeowners see the biggest swings from right-sizing the equipment and the condition of existing ducts. Our team regularly designs systems for homes across the Lexington area’s humid climate, which helps us recommend only what the house actually needs. We provide free written estimates before any work, and every installation is tested and commissioned to verify performance. A properly sized system that matches your ductwork’s air pressure often saves more over time than a larger unit that short-cycles.

Cost typically increases when any of the following are required:

• Full duct replacement or sealing beyond minor fixes.
• Variable-speed or multi-stage equipment and advanced thermostats.
• Indoor air quality add-ons like HEPA filtration or dehumidification.
• New electrical runs or gas piping.

Schedule a free in-home estimate so a technician can measure the home and provide a firm, line-item price. <br/> Updated: 2026-04-21 <br/> Need help in Lexington, SC? Call (803) 888-4115 or book online.