Geothermal heat pumps provide wintertime heating by extracting heat from a source and transferring it to the building. A ground source heat pump uses the top layer of the earth crust (usually three to 500 feet deep) as a source of heat, thus taking advantage of its seasonally moderate temperatures. In the summer, the process can be reversed so the heat pump extracts heat from the building.
By replacing the conventional systems in homes and businesses with geothermal systems many people are taking a step forward in the direction of energy conservation and contributing to a greener environment. Here are some of the benefits that geothermal systems have to offer... http://hvacstlouis.wordpress.com/2014/04/21/9-reasons-to-invest-in-geothermal-system/
Air source heat pumps are among the few types of renewable energy heat pumps that usually absorb heat from sustainable sources. They absorb air and then pump it through a compressor in order to increase temperature before they use it to heat homes as well as small businesses.
Why Heat Pumps Are Said to Be Great Investment? Heat pumps indeed are a vital part of the cooling and heating system. Such components can definitely enhance the energy efficiency of any home. However, it is quite important for the individual to make the right investment. http://globalenergysystems.bcz.com/2014/01/22/why-heat-pumps-are-said-to-be-great-investment/