The often-used term "efficiency" describes the ratio between the quantity of output attained and the amount of effort required for this output. If the effort decreases, efficiency increases. This effect is becoming increasingly important in a wide variety of areas. For example, the efficiency of the fans used is a central topic in ventilation and air-conditioning technology. In light of these facts, it is no surprise that energy-saving EC technology is increasingly replacing conventional AC fans in this area in order to attain an additional increase in efficiency. New centrifugal fans can now provide even more added energy efficiency.

The future of heating technology belongs to renewable energies. In the private sphere, heat pumps are becoming increasingly important. In focus: air/water heat pumps. Because compared to other types of system, these are especially flexible and also ultra-efficient.

Where before, air-conditioning devices for cooling buildings were found mainly in southern regions, today it is becoming popular to use temperature equalising air-conditioning even at more moderate latitudes. So-called fan coils, which consist of heat exchangers and fans, are found ever more frequently not only in hotels and offices, but also in municipal facilities, commercial buildings and even in private residences. And with good reason: After all, the human organism is designed such that it not only feels best at temperatures of approx. 20 °C, but also performs best.

China green building congress took place in Beijing from 3rd to 4th June 2009. The congress gathered over 70 attendees and it interprets China's newly released policies and regulations of green building and energy conservation.

Increasing market demands have induced us to exploit the whole range of possibilities offered by 100% controllable GreenTech EC fans being installed in third party products. The combination of GreenTech EC motor and external control technology is based on fans with a power input of 500 watts or more which are equipped with a MODBUS. "Approved controller" - the sign of full compatibility Approved controller In order to give you the necessary reliability when choosing components, we have entered partnerships with selected control technology manufacturers. Naturally, combinations of GreenTech EC fans and external control technology are tested and examined, and this is documented for you with the "Approved controller" label. "Approved controller" products are already available for GreenTech EC fans from the following manufacturers: CAREL The CAREL solution is based on programmable controllers (pCO sistema) using the 1tool© development environment.