Gas fire Boiler: 1.Compact structure 2.easy maintenance&repair 3.Safe and Reliable 4.professional guid you request Gas fire Boiler: 1.Compact structure 2. easy maintenance&repair 3.Safe and Reliable 4.professional guid you request Product Introduction:This series Gas fire boiler is mainly composed of furnace,seal ring,horizontal water tubes,circular flue,gauges,valves and chimney.Because of no ...