... efficiency 90% 4.Exported to Russia,Ukraine,Armenia,Iran,Italy Gas Boiler Series: Angel SeriesFeature: 1. Aesthetics design , energy saving, ... . Adopted with European technology , high quality components with CE certificates, high efficiency combustion 2. Supply both heating and ... programmer timer 6. Various capacity available :Input capacity : 18KW/ 20KW / 24 KW/ 28KW 7. Can be connected with room ...