... multi-functional diagnostic function c. Suitable for different types of gas,rated gas pressure(Pa),LPG-2800,NG-2000,COAL ... -0.017%e. Heat efficiency and energy-saving,90%of heat efficiency.f. 10 protection functions;g. Remote controller ... main integrated controllern is compatible to various architecture heating and ventilation system including radiators, floor heating, fan coil wall mounted gas room ...