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

The cost to install a new AC and furnace varies by home and equipment, and Paul The Plumber provides straightforward, no-surprise pricing confirmed after an on-site assessment. The biggest drivers are system capacity and efficiency ratings, plus any work needed to fit the equipment to your house. We install matched systems for homeowners in the Hampstead area, which helps us dial in comfort and reliability for local weather. A properly sized pair often costs less to run than an oversized set that short-cycles. You may be able to use our current coupon for $200 off AC or furnace installation when mentioned at booking.

Expect your quote to reflect:

• Load and size required for your home
• Efficiency rating of the AC and furnace
• Ductwork or venting modifications
• Electrical, gas, drain, and flue upgrades

Schedule an in-home assessment to get a firm, itemized quote before you decide. <br/> Updated: 2026-04-11 <br/> Need help in Hampstead, NH? Call (603) 541-7986 or book online. "New Furnace installation: PtheP's technicians were very professional, punctual, and stayed until all aspects of the job were completed." — Dennis T.