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Seeing a Whole New Level of Comfort

The Hydro-Temp VStar's innovative load matching capability maximizes creature comfort and reflects in the monthly bill. Stabilizing temperature and humidity through variable speed technology reduces starts and stops and enhances long term reliability. The VStar also drastically eliminates noise generation resulting in a hvac unit that is so quiet you don't even know its there.

As yet another groundbreaking innovation for Hydro-Temp the VStar Series was the first fully variable Geothermal Heat Pump ever produced, after its release in 2010 the VStar Series unit became third party tested and certified with ENERGY STAR as being the #1 Rated Closed Loop Geothermal Heat Pump ever produced, with Part Load Efficiencies reaching over 50 EER.

Most Efficient 2016

VStar Series Geothermal Heat Pumps Recognized as part of the Most Efficient of ENERGY STAR program for 2013, 2014, 2015, and 2016.

Every year, the U.S. Environmental Protection Agency’s (EPA’s) Energy Star program acknowledges products it deems “Most Efficient” in the marketplace. This effort identifies leading products among those that qualify for Energy Star designation in numerous product categories. Hydro-Temp is excited to announce that our VStar Series geothermal heat pumps have been recognized as a part of the  Most Efficient program for 2013, 2014, 2015, and 2016. Products that are recognized as the Most Efficient of ENERGY STAR prevent greenhouse gas emissions by meeting rigorous energy efficiency performance levels set by the EPA. This honor puts Hydro-Temp at the top of the geothermal industry by highlighting yet another achievement for our already state-of-the-art units.

Benchmark VStar



Our ProtoStar Advanced Control/Monitoring system marries our variable capacity compressor, variable speed blower, and AutoPurge non-pressurized flow center with user control that is unmatched by anyone in the industry. The simple and elegant communicating color touch-screen thermostat is a standard offering on all new VStar orders and is the only control system in the industry that comes standard with a state-of-the-art built-in zoning system that can control up to 4 individualized areas . Calling this device a thermostat really doesn't do it  justice, its more like having a computer on your wall as well as a computer in your unit that are constantly communicating with each other to provide the highest level of comfort while consuming the smallest amount of electricity possible. As with all of our equipment the VStar Series units utilize the stored energy in the ground to provide savings up to 75% on heating, cooling, and hot water!





On February 10, 1981, Hydro-Temp Corporation received patent # 4,249,390 for a full condensing on demand hot water recovery unit.  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 hot water recovery/generation system will turn itself on in the water-heating mode and produce hot water at approximately one quarter of the normal cost of heating water.




Hot Water Assist System

Year Round Hot Water Generation System

Dual Year Round Hot Water Generation System

Dual Function with Hot Water Assist

Heating, Cooling, and Hot Water Assist

Triple Function Heat Pump

Heating, Cooling, and Full Time Hot Water

QUAD Function Heat Pump

Heating, Cooling, Hot Water, Radiant Heating

Next to heating and cooling, water heating is the most expensive utility cost you will have for your home. With this option approximately 6000-9000 BTU's of free hot water is produced whenever the unit runs in the cooling mode. While in the heating mode it produces a portion of the hot water at 1/4 the cost of a traditional hot water tank.

U.S. Patent # 4,249,390 provides you the ultimate in efficiency. Whenever you are cooling the rejected heat will go to your hot water storage vessel first once it is satisfied the remainder of the heat will be rejected to the ground loop. In the spring, fall, and winter the unit will provide all the hot water needs even when there is no space-heating load. In this mode the unit is basically a water-to-air and a water-to-water unit all in one package. With R410a refrigerant the unit can heat water very efficiently up to 120 F.

This Exclusive Hydro-Temp technology is the only equipment available in the industry that is capable of providing SIMULTANEOUS Heating, Cooling, year round Domestic Hot Water Heating, as well as year round Auxiliary Hot Water Heating for Radiant Floors or Walls. On top of being the only true quad function geothermal heat pump in the industry, this system is also available with our VStar Series Variable Capacity Technology that offers state-of-the-art built-in load shifting and zoning technology. This unit  is in a class all on its own, and is quite possibly the most capable geothermal heat pump ever built. Gone are the days of having to purchase both a water-to-air and water-to-water unit to have even a fraction of the same functionality.


Individualized Comfort Control for the Entire House

Hydro-Temp Corporation

Geothermal. Naturally.

P.O. Box 566

3636 Highway 67 South

Pocahontas, Arkansas 72455

(870) 892-8343

© 2016 Hydro-Temp Corporation

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