Marathon HVAC

In Marathon HVAC's own words

Marathon HVAC provides reliable, energy-efficient heating and cooling services across New Hampshire — proudly serving Rochester, Dover, Somersworth, Wakefield, Farmington, Alton, Meredith, Laconia, Conway, North Conway, Sanbornville, Moultonborough, and Wolfeboro. We specialize in furnace, boiler, and A/C repair and installation, mini-split systems, and seasonal maintenance for residential and commercial customers. Known for honest pricing, no hidden fees, and fast, friendly service. Call or text today for a free estimate — no shop, truck, or fuel surcharge fees, ever. Just simple, straightforward parts and labor pricing.

Trade

HVAC contractor

Business address

281 Milton Rd, Rochester, New Hampshire 03868

Telephone

(603) 249-6599

Website

marathonhvacnh.com

Hours

• Monday8:00 am - 4:30 pm
• Tuesday8:00 am - 4:30 pm
• Wednesday8:00 am - 4:30 pm
• Thursday8:00 am - 4:30 pm
• Friday8:00 am - 4:30 pm
• SaturdayClosed
• SundayClosed

From Google, checked May 2026

Register

NH register

Recorded as supplied and as found in public sources. This register makes no credential or quality claim about any business; check license status with the state board.

Google Reviews

5.0 ★★★★★ (10)

• We recently had Marathon install several mini-split units in our home, and we couldn’t be happier with the entire experience. The project took several days as expected for a job of this size, but their team was incredibly professional from start to finish. They were always punctual, showed up when scheduled, and worked late into the evening to make sure the job was fully completed each day. The technicians were kind, knowledgeable, and genuinely helpful — they took the time to explain everything, answer all our questions. What really stood out was their pricing. After getting quotes from several other companies, Marathon’s price was unbeatable while still offering top-tier work. Their service is what truly sets them apart. Just a couple of days after completion, we needed them to come back and check on something. They were able to come out the same day — no hassle, no waiting. That kind of responsiveness is rare. If you’re considering mini-split installation or any HVAC work, Marathon delivered outstanding quality, fair pricing, and the best customer service I’ve actually ever experienced. Highly recommended! Thank you, Marathon team!​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

  Paula B.★★★★★

• Keith did an excellent job explaining the available options and working with me to get a system that met my needs. He did an excellent job installing it and his attention to detail and professionalism was outstanding.

  Eric E.★★★★★

• Had some issues with our Minisplit system no longer producing heat right as it started to frost. Keith, our technician, came by on a weekend and got us fully operational in just under an hour and under two hundred dollars for a complex system, he was able to explain what happened, what he did to fix it, and preventative maintenance for us for future along with pictures and a full walk through. Keith is awesome, Marathon has a long term minisplit customer from us.

  Athena R.★★★★★

• Keith did a wonderful job replacing our water heating system. He noticed a problem with the old propane exhaust pipe and went above and beyond to make it more safe. He was always on time, easy to communicate with, and kind to my kids. And his prices can’t be beat. Five stars all the way!

  Tristen C.★★★★★

• Keith was brought in to resolve major issues with a very complicated residential system after numerous contractors had walked away from the project. He studied the system and came up with cost effective and reliable solutions to make the system viable again. Keith could have sold an expensive replacement heating system ( low six figures were some quotes ) but he took the hard route and fixed the problems. And he has always been available to answer questions by text or call. His invoices were always fair and honest. I highly recommend his services.

  Bob S.★★★★★

• Showed up fast during an emergency situation and was friendly and professional, handling potential barriers very well. Highly recommended. Keith is very helpful, knowledgeable, and understanding.

  J J.★★★★★

• Marathon HVAC was awesome! Very professional company. Keith arrived on time and quickly got to fixing our gas line leak. I would highly recommend Marathon for any HVAC issues.

  Kathy L.★★★★★

• Keith did a perfect job on our propane furnace and our central air. He is on-time, super knowledgeable, and polite. I will never hire anyone else.

  Jay L.★★★★★

• Keith did a great job. His work is high quality and his prices are fair and reasonable. There were no surprises and he was done in the time period he said he would be.

  Michael P.★★★★★

• Great company! I didn't even know they were at my house. If you are looking for someone to do a professional job I would highly recommend hiring Marathon HVAC to do the job.

  Tammy F.★★★★★