... remote control,energy saving, 3.temperature displayer, 4.used for heating and hot water Model JLG18JLG20JLG24JLG30JLG40Rated heat inputkW1820243040Heating efficiency%90 ... and multi-functional diagnostic function c. Suitable for different types of gas,rated gas pressure(Pa),LPG-2800,NG-2000,COAL ... system including radiators, floor heating, fan coil modern style gas boilers for heating and hot water