Ground Loops in Greensburg, IN, Geothermal Applications

You’ve finally gotten, or are considering getting, a a new heating and cooling system. Maybe you’re weighing the advantages of a new Geothermal HVAC. Whatever the case, you very likely want to know a little bit more about how geothermal works.

Geothermal HVACs take consistent temperature from the ground to put hot or cool air into your home. This is possible because of an underground system called a geothermal ground loop.

Ground loops are basically just an underground pipe system. There are several basic kinds of geothermal loop systems that can be used for heating and cooling commercial or residential buildings.

The way it works is, antifreeze fluid flows through the pipes to get heat quickly and efficiently down to a heat pump in your house.

Typically used are four different types of loops: Open Loop, Pond Loop, Horizontal Loop and Vertical Loop. All four are split into two distinct categories: either they’re open loop systems or closed loop systems. The best system for you is dependent on your building and the property on which it sits. Residential systems primarily use vertical or horizontal loops.

Below are more specifics on each kind of ground loop.

Closed systems, which encompass vertical, horizontal, and pond loops, continuously circulate water through them.

Vertical ground loops are used typically in residences because, unlike horizontal loops, they don’t have to have a lot of space. They’re set in place by drilling small holes in the ground that go 100-400 feet deep. Then pipes are placed into the holes and connected below the ground to form the vertical loop. Next, more pipes are attached that channel fluid to the indoor system to transfer the needed temperature from the ground.

A horizontal loop system has to have a lot more space but is actually not as costly since it uses only 2 straight pipes inserted 6 inches underground over an area of ¼ to ¾ acre.

If what you want is a pond loop system, it should go without saying that you must be in close proximity to a pond, lake, pond, or well. Coils are installed vertically and anchored to the bottom of the water source. Water is then transferred through more pipes underground to a pump, where the heat is pulled out and cool water is reintroduced to the pond. Still, in order for this system to work, the water can never be be acidic or else pipes will corrode and filters will need replacing often.

The key difference between open and closed looped systems is the open loop’s need for an adequate source of groundwater, a well or a pond, for example. From there, it directly pumps water into the heat pump unit to be used in heating and cooling your dwelling or other structure.

There are two ways to dispose of used water: through surface drainage or water re-injection. In returning the water back to the earth, it must be said that pollution is not a by-product. The only difference in water that’s processed through a geothermal heat pump is a modest change in temperature.

Before you install an open loop system, it is essential to know whether a well or pond contains enough water to power your geothermal heat pump, and that it won’t deplete a neighbor’s well source. Be sure to check with your local contractor on whether there’s enough water at hand to go ahead with installing an open loop geothermal heating system.