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AIR CONDITIONING
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SOLAR ENERGY
"We put all our energy into saving yours"
301-921-9599
703-876-9599
18900 Woodfield Road
Gaithersburg, MD 20879

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Projects & Services

Featured Projects

Rio Washingtonian Center
Harvey Hottel, Inc. recently completed the replacement of a 1000 ton cooling tower on the roof of the parking garage at the Rio Washingtonian Center in Gaithersburg, MD.
Rockville Cooling Tower
Harvey Hottel, Inc. based in Gaithersburg, Md. one of the Washington DC area's largest HVAC companies just finished the installation of a new cooling tower...
Winchester Welcome Center
Environmentally friendly Geothermal Heating and Cooling system on the brand new Winchester Safety Rest Area & Welcome Center off Route 81 in Winchester, Virginia.

Featured Services

LEED Certified Green Building Designs
Eventually, green buildings and construction plans will be the industry standard. The team at Harvey W. Hottel refuses to skip a beat. We are the Premier LEED Certified Green Building contractor...
Tailored Maintenance Solutions
We recognize that everyone's requirements are not the same so beyond our standard service agreements we offer agreements "tailored specifically to your needs and requirements".

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Testimonials

Open vs. Closed Loop Geothermal Systems

Installing a geothermal heating and cooling system is an energy efficient, environmentally responsible approach to your Northern Virginia home’s operating needs. Geothermal systems use the earth as a heating and cooling source. The system operates via a series of pipes, commonly called a “loop,” which connect the system’s pump to the earth. Two basic kinds of loops exist, which include closed loop and open loop systems.

Closed loop systems are the most common type of geothermal system loop. Closed loop systems include a high-strength, buried pipe filled with an environmentally safe water and antifreeze solution that transfers heat to and from the earth. During the winter, the liquid in the pipe carries warmth from the ground to a unit inside your home, providing constant warm temperature throughout your home. In the summer, the geothermal unit draws heat from your home and carries it through the loop back into the earth.

Open loop systems operate by tapping into a well and then discharging the water once it has been used. Specifically, the loop draws ground water from an aquifer in your well, which then passes through the pump’s heat exchanger and is then discharged to the same aquifer. Open loops are popular in areas where they are permitted, as the temperature of ground water is somewhat constant throughout the year.

Choosing the best system for your home depends on a number of factors, including your budget, preferences, yard space, and availability to a well and adequate water supply. Closed and loop systems operate at nearly the same cost, but open loop systems are usually more expensive to install. Each type of loop system is energy efficient, as geothermal energy is a renewable resource. While geothermal systems can cost more to install than traditional heating and cooling systems, the energy savings add up in the long run.

Contact Harvey W. Hottel Inc. for more information on geothermal heating and cooling systems for your home. Harvey W. Hottel’s staff of highly trained professionals specializes in heating and air conditioning, plumbing, and geothermal services and inspections. Based in Gaithersburg, Maryland, Harvey W. Hottel serves the entire Baltimore, Northern Virginia, and Washington metropolitan area.

Serving Maryland and Northern Virginia including: Montgomery County, MD. Fairfax County, VA. Silver Spring, MD. Vienna, VA. Wheaton, MD. Fairfax, VA. Rockville, MD. Chantilly, VA. Great Falls, VA. Bowie, MD. Herndon, VA. Glenn Burnie, MD. Sterling, VA. Reston, VA. Falls Church, VA. Centreville, VA. Laurel, MD. Chevy Chase, MD. Kensington, MD. Columbia, MD. McLean, VA. Bethesda, MD. Arlington, VA. Silver Spring, MD. Reston, VA. Gaithersburg, MD. Alexandria, VA. Germantown, MD.