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A furnace that quit on a Saturday during Christmas week, on one of the coldest days of the year: a customer said A and C Mechanical answered the call, came out, fixed it and did not charge an astronomical fee. Several customers describe emergency calls like that to this Merrimack, New Hampshire heating and cooling company, which holds 5 stars from 47 ratings and an A+ from the BBB. Its New Hampshire HVAC licence (MBE2001301) is active. The company says it has 25 years in the business and offers 24/7 emergency service. Artie (Arthur) and Corey are the names customers use. An August 2026 reviewer said the company came first thing in the morning when the AC died in a hot stretch, and a July 2026 customer said Arthur handled an emergency on the July 4 weekend. On the installation side, an August 2026 customer described a large conversion from oil to propane with new central air, a mini split and a propane fireplace insert; April 2026 reviewers describe a Mitsubishi mini-split install, a whole-house generator with the permits and electrician handled, and an oil burner and tank replacement where the crew also replaced corroded water pipes. A January 2026 customer said Artie's crew installed a new furnace after a large HVAC company failed them, and an August 2025 customer said a Bosch system install moved up from two weeks out to a few days. Contractors who have worked alongside them recommend them too, and one customer came on a plumber's referral. The company advertises free estimates and serves Manchester, Nashua, Bedford and Concord.
Incredible response time and very good pricing. Not to mention a local family company who cares about service and support. Would give more than 5 stars if possible!
A&C Mechanical did an outstanding job Arthur & Corey completed an enormous job at my house. We switched from oil to propane a new central air system and a mini split in our lower lever propane fireplace inserts . The work was outstanding and the customer service was 100% spot on. My son used them right after me and loves his mini splits . I can not say enough about them from pulling the permits to final inspections . Arthur checks in still to make sure everything has been working properly ! Nobody does that!
AC died during one of the last really hot stretches. Called up A & C Mechanical and they were at my house first thing in the morning and had it fixed asap! Great service at a reasonable price!
These guys did a great job installing my central ac/heat pump! Very friendly and easy to work with. Showed up when they said they would and kept me in the loop every step of the way.
These guys were very nice. Had them come out twice. Arthur was able to come handle an emergency on July 4 weekend which was a life saver. The team came out recently as well to check how the system was working. They were knowledgeable and professional. Highly recommend.
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1 change recorded — last scanned Sep 24, 2026.
Typical New Hampshire range for this kind of work, from regional averages — not a quote from A and C Mechanical LLC. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,700 – $10,700
Typical HVAC project around $7,700
Mini-split installation4.3
Mini-split installation4.2
Cast iron repiping3.7
