Heating, Cooling & Boiler Services in New Hampshire | Marathon HVAC

Professional Heating & Cooling Services

Furnace Repair, Maintenance & Installation

Boiler Service, Replacement & Conversions (Oil, Propane, Natural Gas)

Air Conditioning Repair & Installation

Mini-Split Heat Pump Systems (Ducted & Ductless)

Annual Maintenance & Safety Inspections

Commercial HVAC Services

Locally Trusted to Enhance Comfort and Efficiency in New Hampshire

We pride ourselves on no hidden fees such as Diagnostic Fees Fuel Surcharge Shop Fees Van/Truck Fees Credit Card Fees

Proudly serving Rochester, Dover, Somersworth, Wakefield, Farmington, Alton, Meredith, Laconia, Conway, North Conway, Sanbornville, Moultonborough & Wolfeboro

About Marathon HVAC

With over 30 years of experience, Marathon HVAC is your trusted partner in providing exceptional, personalized heating, cooling, and air quality solutions.

Transform your comfort with tailored HVAC solutions from Marathon HVAC. Experience transparent pricing, outstanding customer service, and high-quality products from the industry’s top brands. Let us help you create the perfect climate for your home or business!

SAVE UP TO $1900

With NHSaves

Thinking about an energy-efficient ductless system to heat and cool your home? Rebates from NH Saves make upgrading to high efficient heating equipment even more appealing—you’ll save money while helping the planet.

Qualifying installations can earn up to a $1,900 rebate for our NHSaves utility partners. And with Marathon HVAC handling every detail, all you have to do is sign the paperwork and wait for your check!

Our Solutions

Marathon HVAC offers a comprehensive range of services designed to enhance comfort and efficiency for both residential and commercial clients in New Hampshire. Below is an expanded overview of our five primary service areas:

Air Conditioning

Marathon HVAC provides tailored air conditioning solutions to ensure optimal comfort during the warmer months. Our services include:

Installation and Replacement: Expert assessment and installation of energy-efficient air conditioning systems suited to the specific needs of your space.
Maintenance and Repair: Regular maintenance programs to keep systems running efficiently and prompt repair services to address any issues, minimizing downtime.
Upgrades: Recommendations and implementation of system upgrades to improve performance and energy efficiency.

Heating

Ensuring warmth and comfort during the colder seasons, Marathon HVAC offers comprehensive heating services, including:

Furnace and Boiler Services: Installation, maintenance, and repair of various heating systems to ensure reliable and efficient operation.
Heat Pump Solutions: Energy-efficient heat pump installations that provide both heating and cooling capabilities.
Radiant Heating: Design and installation of radiant heating systems for consistent and comfortable warmth throughout your space.

Indoor Air Quality

Recognizing the importance of clean air, Marathon HVAC offers services aimed at improving indoor air quality:

Air Purification Systems: Installation of advanced air purifiers & filters to remove contaminants, allergens, and pollutants from the indoor environment.
Humidification and Dehumidification: Solutions to maintain optimal humidity levels, preventing issues related to excessive dryness or moisture.
Ventilation Services: Design and implementation of ventilation systems that ensure a continuous supply of fresh air, enhancing overall air quality.

Building Automation

For commercial clients, Marathon HVAC provides building automation services to enhance operational efficiency:

System Integration: Combining HVAC systems with advanced control technologies to enable centralized monitoring and management.
Energy Management: Implementing automation solutions that optimize energy usage, leading to cost savings and reduced environmental impact.
Remote Monitoring: Offering remote access and monitoring capabilities to promptly address issues and ensure systems operate at peak performance.

Ductless Mini Splits

Marathon HVAC specializes in ductless mini split systems, offering flexible solutions for various heating and cooling needs:

Customized Installation: Designing and installing ductless systems that provide targeted comfort to specific areas without the need for extensive ductwork.
Energy Efficiency: Providing systems known for their high efficiency and ability to reduce energy consumption compared to traditional HVAC systems.
Zoning Capabilities: Enabling individualized temperature control in different zones or rooms, enhancing comfort and energy savings.

With over 30 years of experience, Marathon HVAC is committed to delivering personalized and reliable HVAC solutions. Our EPA-certified, N4-certified, and licensed gas fitter professionals ensures that each service is performed to the highest standards, prioritizing customer satisfaction and comfort.

Our Workmanship Guarantee

At Marathon HVAC, our commitment to quality goes beyond just installation. We back our work with a comprehensive workmanship warranty on all replacement parts, ensuring every component is installed with precision and care. This warranty is designed to give you complete peace of mind, knowing that if any issues arise, Marathon HVAC is ready to step in and resolve them promptly. Trust in our workmanship and enjoy lasting comfort in your home.

Customer Testimonials

Don't just take our word for it—listen to what satisfied customers say about our dedication and service

    
 
 
       Posted on Google  
   
   Bob Strine 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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.
  
 
      Posted on Google  
   
   J Jellerson 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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.
  
 
      Posted on Google  
   
   Kathy Levesque 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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.
  
 
      Posted on Google  
   
   Jay Levesque 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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.
  
 
      Posted on Google  
   
   Michael Panzer 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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.
  
 
      Posted on Google  
   
   Tammy F 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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.
  
 
  
  
 
 
      Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

Why Choose Marathon HVAC

Licensed, Trained & Manufacturer-Certified

Honest Upfront Pricing — No Surprises

Quality Parts, Equipment & Warranty Support

Fast Response Times & Professional Communication

Safety-Driven, Code-Compliant Workmanship

Expert Team

Our EPA-certified, N4-certified, and licensed gas fitter professionals are dedicated to your comfort and satisfaction

Quality Service

We prioritize customer satisfaction above all else, offering personalized solutions tailored to each client’s unique needs.

Advanced Technology

We use the latest technology to ensure optimal efficiency

Check out some of our recent work.

Areas We Serve

Contact Information

Have questions or need expert advice? We’re just a call or click away.

Frequently Asked Questions

Which areas do you service in New Hampshire?

We proudly serve Rochester, Dover, Somersworth, Wakefield, Farmington, Alton, Meredith, Laconia, Conway, North Conway, Sanbornville, Moultonborough, Wolfeboro and surrounding communities.

Do you offer emergency HVAC repair?

Yes — we provide urgent no-heat, no-cooling, and unsafe-operation response depending on technician availability and weather conditions.

What heating and cooling systems do you work on?

We service and install boilers, furnaces, heat pumps, mini-splits, and central AC systems for both residential and commercial customers.

Do you install equipment supplied by the homeowner?

In some cases yes — however warranty, sizing, code requirements, and safety considerations must be reviewed before approval.

Do you offer financing on new systems?

Yes — financing may be available for qualifying customers. We can review options during your estimate appointment.

What brands do you work with?

We work with all manufacturers including Trane, Lennox, Weil-McLain, Mitsubishi, Fujitsu, Bosch, Burnham, Trio, PurePro, Goodman, Carrier, and others.

Do you provide annual maintenance?

Yes — we offer annual, seasonal, and preventive maintenance to improve performance and reduce breakdowns.

Can you convert oil heating systems to propane or natural gas?

Yes — we specialize in oil-to-LP and oil-to-natural-gas conversions including venting, piping, controls, and high-efficiency boiler upgrades.

Give us a call

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