[ Supply] forms : a straight tube length of 6 m / root , 9 m / root , 12 m / root , can also be customized according to customer demand , the coil length negotiation by both parties

GSHP (Ground-source Heat Pump)

The use of earth (soil, ground water) as a heat source for air conditioning of buildings technology. Winter through the heat pump in the land of low grade thermal energy for heating the building increase, the summer through the heat pump to transfer heat to the building underground, to cool the building.
Ground source heat pump concept first appeared in 1912, a Swiss patent literature, had been applied in the heat of some of the Nordic countries in the 1950s.

In the United States, the 1950s began to develop; 1980s by the industry's attention; the rapid development of the 1990s; by 1999 installed capacity reached 50 million units. That is the number of civilian annual growth rate of 15%, the number of business customers grew by 38%.