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Geothermal Heating and Cooling 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.

{slider BTUH}

The number of BTUs produced in one hour.

{slider 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.

{slider 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.

{slider Condenser}

A heat exchanger in which hot, pressurized (gaseous) refrigerant is condensed by transferring heat to cooler surrounding air, water or earth.

{slider 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.

{slider 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.

{slider 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.

{slider Geothermal Heat Pump}

A heat pump that uses the earth as a heat source and a heat sink.

{slider Heat Exchanger}

A device designed to transfer heat between two physically separated fluids or mediums of different temperatures.

{slider 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.

{slider Heat Sink}

The medium – air, water or earth – which receives heat rejected from a heat pump.

{slider Heat Source}

The medium – air, water or earth – from which heat is extracted by a heat pump.

{slider 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.

{slider 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.

{slider 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.

{/sliders

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.

{slider BTUH}

The number of BTUs produced in one hour.

{slider 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.

{slider 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.

{slider Condenser}

A heat exchanger in which hot, pressurized (gaseous) refrigerant is condensed by transferring heat to cooler surrounding air, water or earth.

{slider 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.

{slider 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.

{slider 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.

{slider Geothermal Heat Pump}

A heat pump that uses the earth as a heat source and a heat sink.

{slider Heat Exchanger}

A device designed to transfer heat between two physically separated fluids or mediums of different temperatures.

{slider 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.

{slider Heat Sink}

The medium – air, water or earth – which receives heat rejected from a heat pump.

{slider Heat Source}

The medium – air, water or earth – from which heat is extracted by a heat pump.

{slider 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.

{slider 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.

{slider 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.

{/sliders

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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