Geothermal Key Terms


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Geothermal Heating and Cooling Key Terms
Key Terms:
BTU (or British Thermal Unit): The amount of heat needed to raise the temperature of one pound of water one degree Fahrenheit. BUT is used to signify the heating and cooling capacity of a system and the heat losses and gains of buildings and homes.
BTUH: The number of BTUs produced in one hour.
Closed-loop heat-pump system: A heat-pump system that uses a loop of buried plastic pipe as a heat exchanger. Loops can be horizontal or vertical.
Compressor: The central part of a heat pump system. The compressor increases the pressure and temperature of the refrigerant and the simultaneously reduces its volume while causing the refrigerant to move through the system.
Condenser: A heat exchanger in which hot, pressurized (gaseous) refrigerant is condensed by transferring heat to cooler surrounding air, water or earth.
Cycling losses: The actual efficiency of a heating or cooling system is reduced because of start-up and shut-down losses. Over sizing a heating or cooling system increases cycling losses.
Desuperheater: A device for recovering superheat from the compressor discharge gas of a heat pump or central air conditioner for use in heating or preheating water.
Fossil Fuel: Any of several types of combustible fuels formed from the decomposition of organic matter. Examples are natural gas, propane, fuel oil, oil and coal.
Geothermal Heat Pump: A heat pump that uses the earth as a heat source and a heat sink.
Heat Exchanger: A device designed to transfer heat between two physically separated fluids or mediums of different temperatures.
Heat Pump: A mechanical device used for heating and cooling, which operates by pumping heat from a cooler to a warmer location. Heat pumps can extract heat from air, water or the earth. They are classified as either air-source or geothermal units.
Heat Sink: The medium – air, water or earth – which receives heat rejected from a heat pump.
Heat Source: The medium – air, water or earth – from which heat is extracted by a heat pump.
Open-Loop Heat-Pump System: A heat-pump system that uses groundwater from a well or surface wter from a lake, pond or river as a heat source. The water is returned to the environment.
Payback: A method of calculating how long it will take to recover the difference in cost between two different heating and cooling systems by using the energy and maintenance-cost savings from the more efficient system.
Supplemental Heating: A heating system used during extremely cold weather, when additional heat is needed to moderate indoor temperatures. It may be in the form of fossil fuel or electric resistance.
Contact the Expert Geothermal Heating and Cooling Contractors at Hoffmann Brothers
 For over 20 years, Hoffmann Brothers has proudly installed and serviced Geothermal Heat Pumps and other Energy Efficient heating and cooling systems throughout the St. Louis, Missouri Metropolitan Area. Please give us a call today at (314) 631-5892 or send us an email on our Contact Us page.
Our service area includes St. Louis County, Missouri, St. Louis City, Jefferson County, St. Charles County, St. Clair, Illinois, Madison County, Kirkwood, Chesterfield, Des Peres, Wildwood, Ladue, Town and Country, Frontenac, Clayton, Sunset Hills, and Creve Coeur. Hoffmann Brothers is the premier St. Louis, MO Geothermal Heating and Cooling Contractor. Call today to get your Geothermal Energy Audit. See our Geothermal Key Terms!


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Hoffmann Friends

Hoffmann Brothers Heating & Air Conditioning:

1025 Hanley Industrial
St. Louis, MO 63144
Office: (314) 664-3011
Fax: (314) 256-2716

St Louis Plumbing Contractors
1027 Hanley Industrial
St. Louis, MO 63144
(314) 664-9705

St Louis Water Heater Contractors:
4312  McRee
St. Louis, MO 63110
Office: (314) 664-8574

Hoffmann Brothers St. Louis Mechanical Contractors:
1635 Tower Grove Avenue
St. Louis, MO 63110
Office: (314) 664-3536

St Louis Missouri Workers Compensation

Roskin & Hoffmann
10900 Manchester Rd, STE 213
St. Louis, MO 63122
Office: (314) 821-9013
Fax: (314) 821-4580

The Law Offices of Stephen J. Hoffmann
105 Concord Plaza, Suite 209
St. Louis, MO 63128
Office: (314) 729-0803

Tennessee Geothermal Contractor

Roscoe Brown
959 N Thompson Lane
Murfreesboro, TN 37129
Office: (615) 893-6972




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Hoffmann Brothers
Geothermal Heating & Cooling Company
4301 Lafayette Ave.
St Louis, MO 63110