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Geothermal, The Energy Down Under

Why would we want to include the geothermal heat pump into our house?  The answer is simple.  Because it's durable, saves money, quiet, clean, environmental, a low energy user, and it requires low maintenance.

    * What is a Geothermal Heat Pump?
                                                                                                                                                                                                                                                                    A geothermal heat pump is a device that functions like a refrigerator and is placed underground to use earth's natural heat so it can cool and heat your home.  A geothermal heat pump uses the ground to transfer warm or cool air from one place to another.
   
    * The Basics of How a Geothermal Heat Pump Works
  

summer 1.  Cooler ground temperature
absorbs heat from house.

2.  Cooler liquid is
recirculated to house

3. Liquid in geothermal unit
absorbs heat from the house,
cooling the air.

winter 1.  Ground temperature
remains warmer than
the air.

2.  Circulating liquid
absorbs heat from the
earth.

3.  Geothermal unit
converts warmed liquid
to hot air, warming the
house.
                                
During the summer, warm water is sent underground through the loops to become cooled since the average temperature of the ground is between 50 to 70 degrees Fahrenheit.  The cold water is then sent back up into the home to cool the air. During the winter, cold water is sent underground through the loops to absorb heat that is produced.  The hot water is sent back up into the home to warm the air.
   

* Horizontal Loop System
 
                                                                                                                                                                 
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Slinky System                                                               Horizontal System

There are four types of loop systems that are used depending on the geology of the ground in the area, but the loop system we picked for our development is the horizontal closed loop system.  This system is for recently constructed homes that have a large supply of land and that don't have hard rock.  It contains two pipes that are side-by-side.  To use this system you must have a ground that is at least 4 to 6 feet deep.  A type of horizontal loop system called the slinky system can be used otherwise if you don't have a sufficient supply of land in your area.  The slinky system curls the pipes into multiple circles so there is more pipe used in a shorter area.   The horizontal loop system best fits a home because it has loops that are not deep underground and are complicated.  The system does require a large area of space to use, but you can fix that by using the slinky loop system.
    
   * Environmental?
   
                                                                                                                            

A geothermal heat pump is environmental because it does not use the burning of fossil fuels, combustion flames, and it does not release greenhouse gases.  Every year, all the geothermal systems in the world reduce about 22,400 tons of carbon dioxide emissions.  A geothermal heat pump uses a minimum amount of energy.  For example, a geothermal heat pump is 40% to 75% more energy efficient than any of the other types of  heat pumps.

    * Clean and Quiet                                                                                                                                                                                

Since a geothermal heat pump has its components underground instead of outside, it is totally quiet.  The geothermal heat pump provides clean air because unlike the outside air, there is no harmful fumes, viruses, or allergies coming into the house when using underground air.                                                                             
 
    * Durable                                                                                                                                                                               
A geothermal heat pump is durable because it's made up of a few components and is located inside the house or building, which means that it never erodes from weathering.  The dealers offer a 25 to 50 year warranty on the underground pipes because they are positive that nothing will happen to them.  To show how durable a geothermal heat pump is, the average life span of one is about 22 years.

    * Low Maintenance
 
                                                                                                                                                                
Maintenance of a geothermal heat pump is very simple.  The only thing you need to do for maintenance is to inspect the air filters and check the condensation pans.  The only other thing you need to do for maintenance is to have a technician inspect your geothermal system once every year.  
   
    * Saves Money
                                                 

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The average "Out the door" price of a geothermal heat pump is about 7,500 dollars.  The average "Out the door" price of a normal air conditioning system is about 4,000 dollars.  Even though a geothermal heat pump is allot more costly than a normal air conditioning system, the energy consumption of a geothermal heat pump is somewhere around 25% to 50% less than a normal air conditioning system, which means that you will save a tremendous amount of money on your monthly energy bill.  It should only take about two to ten years for a geothermal heat pump to equal the cost paid for a air conditioning system.  If you install a "desuperheater" you can use the hot air that is inside your house during the summer to heat your water, which means that your monthly water heater bill during the summer will be very close to zero  dollars.  During the winter, your monthly water heater bill will not be the same as the summers bill, but it will still be way better than the monthly heater bill of the average American.

With all the benefits of a geothermal heat pump we wouldn't be able to understand why we shouldn't include it into our home.  Thomas Paine once wrote a book called "Common Sense" and I'm pretty sure that if he ever heard of a geothermal heat pump, he would include it in his book.