Geothermal heat pumps in use since the late 1940s' are boon in this age of global warming. These heat pumps are efficient heating devices as they derive heat from the earth for all purposes. When the air temperature is low, the temperature of the earth is high and vice versa. The geothermal heat pumps make use of this occurrence and exchange heat with the earth through a earth heat exchanger. These pumps are highly useful as even on the coldest winter days they offer efficiency as high as 300-650% as compared to the 150-250% offered by the air-source heat pumps. They are installed with devices which constantly tap the earth's temperature and subsequently manipulate it for use. The process of heat exchange can also be reversible. In summers, heat emitted by buildings, towers etc is transferred back to the earth.

The list of the advantages offered by these heat pumps is endless. The pumps are easy to maintain owing to their mobile parts. They occupy minimum space and thereby are size-friendly. Their features prove their cost-effectiveness. They consume 25-30% less electricity than the conventional cooling or heating units. They have a high capacity to retain humidity and retain 50% of indoor humidity. Hence they are highly efficient in human areas. They have a long life-expectancy of 25-50 years which prolong recurring costs on their replacement for a very long time. They consume around 25-50% less electricity and energy than the conventional cooling or heating systems. They control humidity by maintaining 50% indoor humidity. They are highly effective in humid areas.

The geothermal heat pumps have a flexible design which facilitates their installation. They also provide high-standard 'zone space conditioning' which allows different parts of your home to be cooled or heated to different temperatures. The parts of these pumps are few and highly mobile. They can be replaced very conveniently without much hassle. They usually carry 25-50 years warranty, are size-effective and can be maintained easily. As they have no outside condensing units, they make no noise and are quite inconspicuous. These pumps have a low-operating cost which makes their installation and functioning cost-effective. They incur low maintenance costs and also make use of low-cost integrated water systems. They have a simple design and make no use of supplementary heat devices which tend to incur costs. So very righteously are the geothermal heat pumps attributed as cost-effective.