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How Geothermal Work

There’s A Major Source Of Energy Right Under Your Feet

Your own backyard has the potential to be your source of heating and cooling comfort. Now you can get safe, reliable, energy-efficient heating and cooling from one piece of equipment. Geothermal energy represents the leading edge of heating and cooling technology. It moves heat energy to and from the earth to heat and cool your indoor environment. And compared to ordinary systems, geothermal technology can save you 30% to 60% on your monthly energy bills. Geothermal is the safest, cleanest, most reliable space air conditioning system you can buy.

Geothermal energy is an unlimited resource. The lot surrounding a suburban home or other building contains a vast reservoir of low-temperature thermal energy, typically 10 times that required over an entire heating season. This resource is constantly resupplied by the sun, and the surrounding earth and heat are rejected while cooling during the summer. The universal definition of geothermal is “…pertaining to the heat of the earth.” By using the earth to provide up to 50% of a building’s total heating and cooling needs, GHP systems are truly geothermal energy made practical:

1. Geothermal Vertical Loop

A vertical loop is an ideal choice for a geothermal heat pump when the available land surface is limited. Well, drilling equipment is used to bore small-diameter holes from 100 to 400 feet deep.

2. Geothermal Horizontal Loop

Horizontal loops are typically used when an adequate land surface is available. Depending on the geothermal system needs and space available, pipes are placed in trenches that range in length from 100 to 400 feet.

3. Open Loop

Open loops are also referred to as Well Water Loops, and in ideal conditions, an open loop installation can be the most economical type of geothermal system. An open loop configuration uses groundwater from a well as a direct energy source.

4. Geothermal Pond Loop

Also called a Lake Loop, this method is a very economical way to install when a large body of water is available for use near the geothermal heating and air conditioning system. Coils of pipe are placed on the bottom of the pond or lake to capture and exchange the geothermal energy. Four Times The Efficiency: A geothermal system uses the Earth’s thermal properties in conjunction with electricity to provide unprecedented efficiency. For every unit of electricity the system uses, it provides four units of heating energy, giving a geothermal system a 400% efficiency rating on average. These numbers can translate into real savings on your utility bills year-round.

Let’s get started on your geothermal air conditioning or heating project Call Supreme Service Today Geothermal Specialists or fill out our online form and one of our specialists will get back to you right away. We appreciate the opportunity to earn a 5-star review.

Unlock Energy Savings Today — Call 410-781-1002 for Geothermal Services in Baltimore, MD!

FAQs

A geothermal heat pump is a high-efficiency HVAC system that transfers heat between your home and the ground. Instead of generating heat by burning fuel, it uses underground loop systems to extract or disperse heat. In winter, it pulls warmth from the earth; in summer, it reverses the process. It’s a sustainable alternative to traditional systems, offering consistent indoor temperatures year-round in the Baltimore, MD, climate.
The system uses a closed-loop or open-loop network of pipes buried underground. Fluid inside the loops absorbs thermal energy from the earth and delivers it to the heat pump unit in your home. There, the heat exchanger, compressor, and blower work together to distribute it through your duct system. This ground-source energy transfer is stable and efficient, even in varying Maryland seasonal conditions.
Open-loop systems draw clean groundwater from a well, circulate it through the heat pump, and then discharge it into another well or a drainage field. Closed-loop systems recirculate a mixture of water and antifreeze through sealed underground pipes. Open-loop can be efficient but requires a steady, ample water source and permits. Closed-loop is more versatile and typically preferred in Baltimore’s residential zones due to fewer regulatory restrictions and maintenance concerns.
Loop length and depth depend on the property size, soil type, and system capacity. Horizontal loops are usually buried 4–6 feet deep and may run several hundred feet per ton of heating/cooling capacity. Vertical loops are drilled deeper, typically 125 to 450 feet per ton. Our team evaluates soil composition and available yard space in the Baltimore area to determine the most efficient layout for your home.
Geothermal systems offer a Coefficient of Performance (COP) between 2.5 and 4.0, meaning they deliver 250% to 400% efficiency. This far exceeds conventional gas furnaces, which average around 90% efficiency. Because the system moves heat instead of creating it, homeowners in Maryland often see substantial reductions in energy bills, especially in colder months when geothermal units outperform air-source heat pumps and standard HVAC systems.

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