Geothermal Heat Pump Water Heaters

While the name may sound a little "space-age," geothermal heat pumps are very "down to earth." To put it simply, you can use the natural warmth of the earth to heat and cool.


A geothermal system, also called a ground-source heat pump, works on a simple premise: the earth below a certain depth (the frost line, usually about four feet deep), is a constant temperature throughout the year.

How it works

Heat is taken from the ground and transferred to the air in your facility during the winter; the process is reversed during the summer.

Loops of piping are buried in the ground on your property, either vertically or horizontally. The ground loop is connected to a pumping module inside your building, where a mixture of water and antifreeze is circulated through the system.

As the liquid moves through the underground pipes during winter months, it absorbs heat from the earth. When the heated liquid reaches the heat exchanger, it is converted through the refrigerant process to warm air and circulated through the building.

Geothermal Energy

Have you ever seen pictures of a volcano or a geyser? If so, then you’ve seen geothermal energy in action!

"Geo" means "from the earth," and "thermal" means "heat," so this type of energy is found under the earth. 

The hot lava from a volcano and the hot steam from a geyser both come from underground heat – and we can use that same type of heat for much more efficient heating needs.

Geothermal heat pumps offer unmatched benefits over traditional heating and cooling systems, including:

·Lower operating costs: A geothermal system can cut utility bills by 30 to 50 percent compared to conventional heating and cooling systems.

·Environmental impact: Ground-source heat is naturally renewable and non-polluting.  

·Lower maintenance costs: All equipment is protected indoors or underground.

Life span: A geothermal system can have a life expectancy of up to 30 years; ground loops are often warranted for up to 50 years.

·Single system: Geothermal equipment provides both heating and cooling in one system.

·Indoor comfort: Geothermal systems eliminate the drafts common with conventional forced-air systems.

·Design flexibility: Geothermal systems can be easily and inexpensively subdivided or expanded to fit building remodeling or additions.

·Energy efficiency: A geothermal heat pump can move more than three units of heat energy for every one unit of electrical energy used to power the system.

·Safety: No dangers of gas leaks or carbon monoxide poisoning.

Environmental Impact

While the economic advantages are significant, the environmental impact of a geothermal heating and cooling system can be even more convincing.

Energy  conservation and renewable energy

The U.S. Department of Energy forecasts that by the year 2030, geothermal heat pumps can provide as much as 2.7 quads per year of renewable energy. This is very significant, as our annual energy appetite in the U.S. is 81 quads per year and growing.

According to the U.S. Environmental Protection Agency, geothermal systems average 40 percent greater efficiency than air-source heat pumps, 48 percent better than natural gas furnaces and 75 percent better than oil furnaces.  


Geothermal systems currently in use help to remove more than 1.5 million metric tons of carbon emissions from the atmosphere every year.

In one study, a 3.5-ton residential system in Indiana reduced the power needed for heating, cooling and water heating by more than 17,000 kWh per year compared to electric resistance heat. This equates to more than nine tons of coal that would have been burned at a power plant. Annual carbon dioxide emissions alone were cut by 12 tons. The savings increase with larger systems.

Wells and water issues

For years, geothermal heat pumps have been connected to wells in coastal areas with high water tables.

In these open loop systems, the water is pumped from the well, used once, then pumped out. The only change in the water was a slight temperature difference. The rejected water is returned to a surface well, lake or stream, continually removing water from the aquifer. Other systems use a recharge well to return the water into the ground.

Properly installed and maintained systems pose relatively few problems. But because the potential for abuse exists, some states and communities have prohibited the use of open loop systems. Check local codes for water discharge regulations.

Performance Data and Specifications
for Geothermal Heat or Cool Heat Pumps.


SS-10 Data Sheet.pdf                DS-20 Data Sheet.pdf                FS 60 Data Sheets(1).pdf             XS 150 Data Sheets.pdf

SS-15 Data Sheet.pdf                DS-20 Data Sheet.pdf                FS 80 Data Sheets.pdf                XS 180 Data Sheets.pdf

SS-20 Data Sheet.pdf                DS 40 Data Sheets.pdf                FS 80 Data Sheets.pdf              ES 200 Data Sheets.pdf

SS-25 Data Sheet.pdf                DS 40 Data Sheets.pdf                XS 120 Data Sheets.pdf             ES 240 Data Sheets.pdf

Heat Harvester BM Full Line Catalog.pdf with bookmarks, or choose models below.Geothermal_files/HeatHarvester%20BM%20Full%20Line%20Catalog.pdf