According to the Environmental Protection Agency, geothermal systems are the most energy efficient, cost-effective and environmentally clean heating/cooling systems available. A 1,500 square foot home in Colorado that uses a geothermal heat pump, averages energy costs of $1 a day. This includes all heating, cooling and hot water needs!
Geothermal heat pump systems can reduce a building’s energy consumption by 25% to 75%, as compared with conventional heating systems. Not only do they reduce energy consumption, but GHPs significantly lesson corresponding emissions. Emissions can be reduced up 44-72%, as compared with standard air-source heat pumps and air conditioning equipment. If you want to upgrade your space conditioning sources or are building a new home, these systems are green, clean and lean. In the long run they will benefit your pocket-book and the environment.
The simplest description of the geoexchange process is the movement of heat from the earth (or a groundwater source) into the home in the winter, and the discharging of heat back into the ground in the summer. Much of the country experiences extreme seasonal temperatures. But, did you know that just a few feet below the earth’s surface, the ground remains a relatively constant temperature? Ground temperatures range from 45 to 75 degrees Fahrenheit. As in a cave, the ground temperature is warmer than the ambient air in the winter and cooler than that air in the summer. Geoexchange systems take advantage of this natural phenomenon.
GEOTHERMAL HEAT PUMPS: THE NUTS AND BOLTS OF HEAT EXCHANGE
The geothermal system includes these principal components:
– Earth Connection
Using the earth as a heat source and sink, a series of pipes is buried under ground, near the house. A fluid (water or a mixture of water and antifreeze) is circulated through these pipes. If the surrounding air is cooler than the soil, the pipes will absorb heat and if the air is warmer, they will sink heat back into the soil.
– Geothermal Heat Pump
For the actual heating of your home, a geothermal heat pump is installed. This heat pump removes heat from the fluid in the pipes, concentrates it, and then transfers it to the building. The process is reversed for cooling.
– Heat Distribution
Generally, conventional ductwork is used to distribute heated or cooled air from the pump into and throughout the building.
THE “DESUPERHEATER”: REDUCE YOUR HOT WATER COSTS BY HALF!
Geothermal heat pumps can be equipped with a “desuperheater. Yes, it sounds like a super hero and in some ways, it is. This device will heat your household water. The heat extracted from the house by your GHP during the summer, is then transferred from the GHP’s compressor into the house’s hot water tank. Winter water heating costs can be reduced by half with use of the “desuperheater”. HOT STUFF!
SHORT TERM COSTS VS LONGTERM SAVINGS
On average, a geothermal heat pump system costs about $2500 per ton of capacity. This would translate to roughly $7500 for a typical residential sized home. Other standard systems with air conditioning units usually go for about $4000. But, consider that with GHP’s high efficiency and much lower utility bills, your investment can be recouped in two to ten years. Financially, it is a golden ticket to strengthen the investment in your property. Not only in long term savings, but also in terms of increasing property value. A property that is equipped to heat/cool using geothermal is mostly self-sufficient, energy wise. There is real re-sale value, right there. Likewise, many geothermal systems can be financed with special loans from banks and other financial institutions. Get on board now, and invest in the investment that keeps on giving, naturally!
GEOTHERMAL IS SUPERIOR
DURABILITY
With fewer mechanical components that are all sheltered from the elements and possible vandalism, geothermal heat pumps are durable and highly reliable. Expect piping systems to come with 25-50 year warranties. The GHPs themselves last 20 years or more.
IMPROVED HUMIDITY CONTROL
GHPs are very effective in humid areas. GHPs improve humidity control while maintaining a 50% relative indoor humidity.
EFFICIENT AND QUIET
A two speed GHP system is so quiet. There are no tell-tale blasts of cold or hot air, as with other systems. Imagine, no A/C noise bothering the neighbors or buzzing the patio. With geothermal systems there are no outside condensing units, hence no constant hum, as with conventional air conditioners.
DESIGN IN MIND
Geothermal heat pump systems allow for design flexibility and can be installed in both new and retrofit situations. The hardware requires less space than conventional systems and so equipment rooms tend to be smaller. Imagine all the valuable home space freed up for other uses! The system also provides “zone” specific conditioning. Different parts of your home can be heated or cooled to different temperatures using GHPs.
There are so many advantages when you install a geothermal system in your home. First and foremost the immediate advantages will be for you, the consumer. Savings in utility costs will be from 20-70%! But, also consider what you will be doing for the environment with reduced emissions and reduced energy consumption. Every 100,000 homes built with geothermal heat pump systems reduce foreign oil consumption by 2.15 million barrels annually! What more do you need to know? An investment in a geothermal system for your home is undeniably wise for you, your future, the future of our planet and generations to come.
Andy Asbury, author, urban REALTOR
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