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WNS series gas-fired (oil-fired) hot water boiler

Hot water
  • Thermal capacity

    0.7-14 MW

  • Working pressure

    0.7-1.25 MPa

  • Available fuel

    Natural gas, coke oven gas, biogas, diesel, heavy oil, light oil, crude oil, etc.

  • Available industries

    Heat supplying, hospital, hotel

WNS series gas-fired (oil-fired) hot water boiler
WNS series horizontal internal combustion boiler is a boiler shell type 3 passes wetback oil/gas fired boiler. After fuel is being atomized by burner, flame is full of the wave furnace and transfer heat via furnace wall, this is 1st pass; the high temperature smoke is collected in reversal chamber and then enters 2nd pass which is grooved tubes bundle area; after heat convection, air temperature gradually falls and goes to front smoke box and turn to 3rd pass, which is smooth tubes bundle area, and then enters chimney passing back smoke box and exhausted to the atmosphere.



  • Smoke Box
  • Adopting hinged structure with good sealing effect
  • Easy maintenance, inspection, and cleaning
  • Corrugated Furnace
  • Strong flue gas disturbance and good heat transfer effect
  • Enhancement of furnace strength and elasticity
  • Economizer and Condenser
  • Improve the thermal efficiency to more than 95%
  • Finned tubes for enhanced heat transfer efficiency
  • Threaded Smoke Tube
  • Extending flue gas residence time for enhanced heat transfer
  • High-efficiency heat transfer element, 1.4 times more efficient than regular smoke tubes
  • Fully Automatic Safe Operation

    Boiler IoT + Remote Control + Expert Management

  • Thermal Efficiency>95%

    Corrugated furnace & Threaded smoke tube
    Economizer & Condenser

  • Easy Maintenance

    Advanced control system allows for unattended operation

  • Eco-Efficient

    Low-nitrogen burner + combustion technology
    NOx emissions ≤30mg/Nm³

Model Rated thermal power (MW) Rated working pressure (MPa) Rated output water temperature (℃) Rated feeding water temperature (℃) Maximum transport weight (t) Maximum transport dimension (m)
WNS0.7-0.7/95/70-Q(Y) 0.7 0.7 95 70 4.0 3.25×1.80×2.10
WNS1.4-0.7/95/70-Q(Y) 1.4 0.7 95 70 8.3 4.40×2.16×2.52
WNS2.1-0.7/95/70-Q(Y) 2.1 0.7 95 70 8.9 4.70×2.40×2.75
WNS2.8-0.7/95/70-Q(Y) 2.8 0.7 95 70 13.3 4.95×2.55×2.95
WNS3.5-0.7/95/70-Q(Y) 3.5 0.7 95 70 14.3 5.35×2.65×3.30
WNS4.2-1.0/115/70-Q(Y) 4.2 1.0 115 70 19.5 5.95×2.75×3.15
WNS5.6-1.0/115/70-Q(Y) 5.6 1.0 115 70 22.6 7.05×2.80×3.25
WNS7-1.0/115/70-Q(Y) 7.0 1.0 115 70 25.8 7.05×2.80×3.25
WNS10.5-1.0/115/70-Q(Y) 10.5 1.0 115 70 33.0 7.90×3.45×3.70
WNS14-1.0/115/70-Q(Y) 14 1.0 115 70 46.0 8.00×3.75×3.95

* The basic parameter table provided is a reference, but ZOZEN Boiler can tailor the boiler device and system to your specific needs. Note that specifications and descriptions may differ from the actual product, and ZOZEN reserves the right to modify them without notice. For additional specifications, please contact us.

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Wuxi ZOZEN Boilers Co., Ltd. has been committed to the research, development and production of industrial boilers since its foundation in 1988. ZOZEN has passed ISO9001:2015 and obtained PRC Grade A Manufacture License of Special Equipment (Boilers), ASME "S" (Power Boilers) and "U" (Pressure Vessels) stamps and many other international certificates of authorization.