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Our Products

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High Efficiency Boilers and Water Heaters

High efficiency water heaters and boilers provide hot water for less. No one wants to take a cold shower!

Learn More about Rinnai Water Heating

Rinnai Tankless Water Heating Solutions

Rinnai Tankless Water Heating Solutions – for Consumers

Rinnai Demand Duo ™ Hybrid Commercial Water Heating Solutions – for Trade Professionals

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Duct Systems


We install metal duct systems that meet industry standards. All of our duct systems are sealed and insulated for the highest efficiency.


This is specialized duct that can be buried and sealed underground where traditional duct systems can not work. This type of system can be buried under concrete foundations, brick, low crawl spaces, or other hard to reach areas.

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Ductless HVAC Equipment and Installation

All around the world ductless systems are the standard choice of HVAC systems. Efficiency and application make this a great way of heating and cooling in residential and commercial application.

Mitsubishi Electric – Zoned Comfort SolutionsĀ®

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Indoor Air Quality Sales and Installation

Indoor air quality (IAQ) is a growing concern for owners of both new and existing homes. To improve the air quality in your home we offer a wide variety of IAQ products, including air cleaners, humidifiers and filters that work with your heating and cooling system to help improve the comfort of your home. Get high-quality energy efficient products from the company you know and trust. Call us today!

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Humidification and Dehumidifier Systems

Home too dry or moist? We can help you today! Whether you need to add or remove moisture from your home, we can help. Contact our HVAC and ventilation system experts today. We’ll get you the humidifier or dehumidifier you need to make your house more comfortable to live in, any time of year.

Joyce Blevins

Marathon has been great. We have used their service for several years. They are usually able to come as soon as you call if a problem develops. This has been very helpful on the hot summer days. They are very knowledgeable. Their prices are reasonable. I don't feel that I have been overcharged. They explain the billing process very thoroughly so there have been no surprises. I highly recommend this company if you are having heating/cooling issues.

Jerry Waldron

Marathon recently installed a residential heat pump for us. They provided model options and very competitive pricing. They beat two large local competitors by about 10%. They showed up on time and did a thorough job in messy weather conditions. Thanks guys.

Kitty Barnes

I highly recommend Marathon. I used them for the past 10 years and they were always quick to respond to issues. Eventually they replaced my old HVAC, which was done professionally. Their team members were courteous and knowledgeable. Thank you, Marathon Team.

Robert Taylor

5 stars.

Nonya B.

Never a complaint in the 5 years I did business with Marathon Service. They replaced an old unit and the entire process was seamless. Their price was more than fair and the quality of work was priceless. Everyone I dealt with at Marathon was respectful and true professionals. I recommend them for any of your HVAC needs.

David Edwards

Marathon Service is a very reliable and efficient company. They have been to my residence several times to work on my HVAC units, and I have been pleased. Not only are the technicians professional, but the office staff is as well. I highly recommend this company to meet all of your HVAC needs.

Chris Wall, Harborside Bar & Grill

They are always there when we need them! Marathon Service Company has been our refrigeration service techs for 15 years now. They are always there when we need them. They keep everything running the way it should be and the beer is always ice cold!

Susan Williams

Very Professional, Excellent Customer Service, Dependable and they have done AWESOME work for us! Strongly recommend them! They stand behind their product and the service they provide! Thank you for Doing All You Do!

Ron and Barbara Jonson

The service your company provided was great. The heating system is working fine, the service your company provided was great. A special thanks to your crew that installed the duct work and furnace. I would certainly recommend Marathon Services to everyone. Thanks again.