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Geothermal Heating And Cooling: The Go-To System When Switching Out Your FurnaceGeothermal heating and cooling systems are the most energy-efficient home comfort systems you can buy. Rather than burning fossil fuels for heating or using ozone-depleting refrigerants for cooling, a geothermal heating and cooling system uses renewable (and free) heat from the earth.

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"They are always fast and efficient. Never had to wait long for service. Today Brian did an outstanding job. Diagnosed the problem immediately and had the furnace up and running."

Joy Miller-Long
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"Just signed up for a planned service agreement to keep my AC and Furnace tuned up. Great value and great service!"

Stefan Hartman
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"Caleb was very courteous and thorough on his routine check-up of our heating system. Thank you."

Ron N.
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"Technician was on time, professional and completed our HVAC service promptly. Would highly recommend Hartman Brothers!"

Eric Korte
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"Thank you for fixing my furnace tonight!! It's cold and will be colder tomorrow night... I knew I made the right decision having you install my furnace and air conditioning. You are awesome!! I love my generator that you installed as well!"

Cheryl Kensill
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"Hartman Bros does a good job They installed my Lenox system and maintain it every year. They have always been responsive and professional. I will use them for my next system."

Judy Gleason
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"Hartman Brothers have been our go to for three years now. They are professional, friendly and on time. Their communication is top notch. I know when they are showing up, or if they are going to be delayed. No guess work with these guys! Highly recommend."

Heather S.
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"I have a hot water tank that's 24yr old. Brad came out to diagnose it and flush it out. Great Service! Great office staff. Great experience. I'll be calling them again!"

Connie G.
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