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Hydro-Temp was formed in 1976, incorporated in 1978, and in 1981 received a patent for a full condensing on demand hot water heat recovery unit.

On February 10, 1981, Hydro-Temp Corporation received patent # 4,249,390.  This patent was awarded because of the unit's ability to transfer 100% of a buildings unwanted heat (during the cooling cycle) into the buildings hot water tanks.  During the past 30 years we learned in many cases we could produce 100% of a buildings hot water at no cost during the summer and at a very low cost in the winter.  In order for this to occur it is important that our priority water heating system be installed on a unit that does a lot of cooling, during both summer and winter.  Normally a unit that provides heating and cooling for a kitchen or an internal area of the building will work best.  If  hot water heating is needed when no cooling is being done that’s also okay.  Our patented priority system will turn itself on in the water-heating mode and produce hot water at approximately one fourth of the normal cost of heating water.

Hydro-Temp Corporation was also the first geothermal manufacturer to develop a two-speed unit, and then in 1994 was the first company to develop a three-stage unit (multiple compressors). The three-stage unit was developed in response to a growing desire by customers to have a unit that could provide load matching by changing capacity and being able to adapt to a zone dampering system and eliminate the need for bypass dampers in addition to greater moisture removal.

Hydro-Temp has worked with many utility companies all over the United States. The company has been involved in research-related projects with organizations such as the Tennessee Valley Authority, The Electric Power Research Institute, and The National Rural Electric Cooperative Association as well as state wide organizations like Arkansas Electric Cooperatives, Associated Electric Cooperative in Missouri, and Western Massachusetts Electric. As a manufacturer of earth coupled heat pumps, Hydro-Temp Corporation has dealers and distributors throughout the United States. Hydro-Temp’s sister company, Air-Flo Company, is a licensed mechanical contractor in Arkansas, Missouri, Tennessee, Mississippi and Alabama.

Hydro-Temp not only has standard unit offerings, we also provide design built units to our customers.


Hydro-Temp is constantly “custom building” new and unique units for its customers across the United States. Many of these new units are not shown on this website. If you have a unique application, there is a good chance we have already built a unit similar to what you need. Give us a call, and we’ll be glad to discuss your application with you.


Here are several case studies using Hydro-Temp systems

Richardsville Elementary School

Fayette High School

First Baptist Church of Marion

War Memorial Pool & Athletic Center


Contact phone number 800-382-3113

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870-892-8343 Voice

870-892-8323 Fax 

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