... delivered for easy installation, debugging an2) Fully automatic performance, combustion, water lever, temperature and steam pressure are all automatically ... 86.98.710.412.3suitabe feullight oil, petroleum,city gas, liquidfied gas, nature gasdesign efficiency (%)92.1491.8892.292.1092 ... .532.843.2 suitabe feullight oil, petroleum,city gas, liquidfied gas, nature gas(%)72.7592.6292.4691.2290.8690.12 rated ...