Geothermal System Installation

Geothermal Systems Heat & Cool Using the Ground

GeoExchange Drilling Rig

Considering Geothermal? Calvert Well Drilling installs geothermal loop fields (the outdoor portion of a geo system). We can help you get a quote on a complete geothermal installation as well as a savings estimate. Covering St Mary’s County and Charles County in addition to Calvert. Wondering how it works?

Geothermal Heating and Cooling is often referred to as Geoexchange, Geothermal, or Ground Source Heating and Cooling. They all mean the exact same thing, so don’t get confused by these names being interchanged. We are NOT talking about geothermal power (involving power plants generating electricity).

Geothermal works because the ground beneath our feet is warmer than the outside air in the winter and cooler in the summer. Inserting a series of small pipes into the ground allows heat to be transferred to and from your home. In this process heat is not created, it is transported therefore no fuel is burned.

The most efficient gas furnace has an efficiency rating of ~94%. Geothermal delivers a 400% efficiency rating. 4 units of energy are delivered for every 1 unit of electrical energy. This does not bend the laws of physics; geothermal systems are transferring heat, not creating it by burning something. A more efficient comfort system lowers the bill significantly, up to 70%.

Two Pieces to the Geothermal System

Geothermal Example1. Heat Pump – the inside unit known as the heat pump

2. Ground Loopunderground pipes which connect to the heat pump

Winter Operation: The underground pipes, called a ground loop, circulate water which absorbs the heat from the earth and returns it to the indoor heat pump. The heat pump extracts the heat from the liquid then distributes it throughout your home as warm air. With the heat removed, the water is re-circulated to collect more heat from the ground. In this case, the loop water is warmer when it comes into the home than when it goes back into the earth since the heat is being removed.

Summer Operation: The indoor heat pump takes the hot air from your home and removes the heat. This leaves behind cool air to be distributed through your vents as air-conditioning. The removed heat from the air is rejected into the earth through the ground loop. In this case, the water is warmer leaving the home than when it returns since heat is rejected into it.

This is not a new technology, this is not a science experiment, this not rocket science. In fact in many European nations geothermal heating and cooling is the standard. In Sweden and Switzerland, more than 75% of new homes have geothermal.

The EPA has acknowledged geothermal systems as the most energy efficient, environmentally clean, & cost-effective space conditioning systems available.

Can I install a ground source heat exchanger myself?

It’s not recommended. Thermal fusion of the pipe, drilling and trenching are procedures best handled by licensed professionals. Nonprofessional installations may result in less than optimum performance, which could cancel out anticipated savings

How far apart are trenches and vertical boreholes spaced?

Trenches are spaced four to five feet apart while boreholes are spaced ten to fifteen feet apart.

How long does it take to install a vertical system?

With the vertical installation, time varies with conditions on the site such as type and depth of the overburden, type and hardness of the bedrock, and the presence of aquifers. Typical drilling times are one or two days; total installation can usually be accomplished in two days.

Want to Learn More About Geothermal?

Give us a call today. Free Quotes, Free Design Help, and referrals to HVAC contractors who provide the heat pump installation.

Serving St. Mary's County, Charles County, and Calvert County MD

Geo Install St. Mary's County MD


871 Solomons Island Rd S,
Pince Frederick, MD 20678, USA Phone: (410) 535-2804
Fax: (410) 535-2519