Upper energy vacuum hot water boiler is divided into ZWNS-Y type fuel oil, ZWNS-Q type gas and ZWNS-D type electric heating vacuum hot water boiler three kinds. Shangneng ZWNS vacuum boiler series all use water...

ZWNS Vacuum Boiler with Low NOx (NOx < 30mg/m3) is designed based on the original ZWNS Vacuum Boiler, which has three return. The Low NOx type ZWNS adopting a FGR with four-return heat transfer structure (invention...