From day now, big demands are made of temperature control systems in modern buildings. Traditional systems for example: ventilation air conditioning quickly reach their limits regarding optimal comfort with minimal space and energy requirements. The traditional radiator heating and air conditioning systems are increasingly being displaced by capillary tube systems for heating and cooling, because of the following advantages cooling and heating in one system comfortable room climate because of radiation energy applicable at walls, ceilings and floor strict CO₂-neutrality reachable substantial reduction of energy costs up to 90% because of consequent usage of regenerative energy sources due to low inlet temperature considerable reduction of insulation costs since no outside insulation required, especially for (monument-listed) buildings insulation on the inside of monument-listed buildings w