A method for adjusting the setpoint temperature of a heat transfer medium circulating in a heating or cooling system (9) inside a building or at least inside a surrounding part of a building. The heating or cooling circuit includes a plurality of heat transferring units, each with a temperature controlled valve. A sum opening degree (OD) of all temperature controlled valves is determined in a time dependent manner and a setpoint temperature T.sub.w,ref of heat transferring medium is controlled according to a predetermined sum opening degree (OD) of all temperature controlled valves. A heating system (9) is provided for supplying heat to a building or a part of the building via a liquid heat transfer medium circulated in a circuit. The heating system (9) includes heat transferring units, each being equipped with a temperature controlled valve. The system is controllable according to the method for adjusting the setpoint temperature.

Disclosed is a system for heating and cooling, respectively, of more than one house, where at least two houses are connected to a common energy storage in the ground and where a control device is arranged to transport a heat carrier in a pipe work connected to the energy storage. The houses are connected in parallel in relation to each other to the pipe work. Certain of the houses are arranged to exploit the heat carrier for cooling by raising the temperature of the exploited heat carrier with about 3-4 C. at the same time as other houses exploit the heat carrier for heating by lowering the temperature of the exploited heat carrier with about 3-4 C. The common heat storage is arranged so that the heat carrier flowing out from the common energy storage holds an approximatively constant temperature. A related method is also disclosed.

Disclosed is a system for heating and cooling, respectively, of more than one house, where at least two houses are connected to a common energy storage in the ground and where a control device is arranged to transport a heat carrier in a pipe work connected to the energy storage. The houses are connected in parallel in relation to each other to the pipe work. Certain of the houses are arranged to exploit the heat carrier for cooling by raising the temperature of the exploited heat carrier with about 3-4 C. at the same time as other houses exploit the heat carrier for heating by lowering the temperature of the exploited heat carrier with about 3-4 C. The common heat storage is arranged so that the heat carrier flowing out from the common energy storage holds an approximatively constant temperature. A related method is also disclosed.

Device for heating and cooling, respectively, more than one house, where at least two small houses (1) are connected to a common energy storage (2) in the ground and where a control device (3) is arranged to transport a heat carrier in a pipe work (4) connected to the energy storage (2). The small houses (1) are each arranged to have a separate respective heat pump device, and in each heat pump device is connected to the pipe work (4), so that, firstly, the heat carrier can flow through the heat pump device and, secondly, the small houses (1) are connected in parallel in relation to each other to the pipe work (4).

Device for heating and cooling, respectively, more than one house, where at least two small houses (1) are connected to a common energy storage (2) in the ground and where a control device (3) is arranged to transport a heat carrier in a pipe work (4) connected to the energy storage (2). The small houses (1) are each arranged to have a separate respective heat pump device, and in each heat pump device is connected to the pipe work (4), so that, firstly, the heat carrier can flow through the heat pump device and, secondly, the small houses (1) are connected in parallel in relation to each other to the pipe work (4).

Hand dryer 1 wherein the control means 9 are configured for operate at least in two operating regimes, a normal operating regime wherein the motor 5 pumps the air for drying the hands and which is activated by the sensor detection 8 and a motor heating operating regime 5 wherein the stator 7 and/or the rotor 6 of the motor 5 are fed for increasing its temperature and maintain it to a predetermined temperature for accumulating heat which is activated by no detection of the sensor 8, such that at the start of the normal operating regime, the motor 5 has stored heat for ensuring that the air exits already heated.