Electrically-operated, pressureless heating boiler without expansion vessel, in particular for a domestic central heating installation

摘要

The invention relates to an electric boiler for heating water. The boiler comprises a heat-insulated enclosure 1 comprising copper housings 7 immersed in the water E and containing removable and insulated resistors 8. The water in the boiler is kept at atmospheric pressure by virtue of an air gap 21 between the level NE and the upper wall 1a of the enclosure. A pump 11 ensures forced circulation in the central heating installation. This type of boiler is particularly suitable for domestic central heating installations. <IMAGE>