... remote control,energy saving, 3.temperature displayer 4.used for room heating and hot water Model JLG18JLG20JLG24JLG30JLG40Rated heat inputkW1820243040Heating efficiency%90%90%90%90% ... optionalh. The main integrated controllern is compatible to various architecture heating and ventilation system including radiators, floor heating, fan coil 8L wall mounted gas combi boilers for heating and hot water