WNS Series Hot Water Boiler

WNS hot water boiler adopts reasonable design of the heating surface to reduce the exhaust gas temperature to below the water vapor dew point temperature, make full use of the latent heat of vaporization of water vapor, and cooperate with the ultra-low nitrogen burner, which has the advantages of high thermal efficiency and energy saving.

Rated Power
0.7 - 14 MW
Working Pressure
0.7 - 2 MPa
Thermal Efficiency
Available fuel:
natural gas, coke oven gas, biogas, LPG, diesel oil, etc.
Available industries:
central heating, hospitals, hotels, schools, etc.


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Model WNS1.4 WNS2.1 WNS2.8 WNS4.2 WNS5.6 WNS7.0
Rated Power MW 1.4 2.1 2.8 4.2 5.6 7.0
Rated Water Pressure MPa 1.0/1.25/1.6
Rated Inlet / Outlet Water Temperature 70/95
Applicable Fuel / Natural Gas/LPG/Diesel Oil
Fuel Consumption N.gas Nm³ /h 151.4 227.8 303.7 457 607.3 726
LPG Nm³ /h 53.7 80.6 107.4 161.9 215 266.8
Diesel Oil kg/h 126 189.1 252.1 379.5 504 625.4
Thermal Efficiency % 93%(not including economizer)/ 96%(including economizer)/98%(including economizer,condenser)
Power Consumption Kw 4 6.5 9 12 13.5 21
Voltage V 380/50Hz(CN),240/60Hz(US),220/60Hz(PH)
Gross Weight T 6.8 9.1 11.8 15.9 20.2 29.1
Water Volume 4.3 6.4 8.1 11.1 15.4 19.1
Boiler Back Pressure Pa 559 737 794 915 1154 1245
NOx Emission Value / ≤150mg/Nm³ / ≤80mg/Nm³ / ≤30mg/Nm³
Size L mm 4023 4435 5400 5638 6668 7280
W mm 1840 2028 2200 2393 2596 2736
H mm 2204 2434 2670 2772 2956 3254

* The above parameters can be changed without prior notice. If there is any change, the actual product shall prevail.

* The low-level calorific value of fuel in the table is calculated according to the following values: Light diesel oil: 42875kJ/kg (10240kcal/kg); Natural gas: 35590kJ/Nm3 (8500kcal/Nm3) ; LPG: 100488kJ/Nm3 (24000kcal/Nm3)* The above parameters can be changed without prior notice. If there is any change, the actual product shall prevail.

* Devotion can customize other special specifications and models according to user requirements.

Service Process

Project Design
According to different need, we provide different system transformation plans of boiler room and maximize the user's benefits.
Pre-sales Technical Support
Devotion makes detailed technical talk with users, optimizes the possible problems, and ensures the better implementation of the project.
Installation and Commissioning Guide
Devotion supports user on-site check according to the inspection list and arranges technical guide of installation and commissioning, and conducts technical training.
After-sales Service
After getting service notification, Devotion will respond quickly. If the e-mail or video communication is not helpful, a technician can be arranged to the site.

Customized Service

Submit the request and we will get in touch with you in the shortest time
Phone Number
Fault Description
Devotion Expert Online
Devotion Expert Online
Online Consultation
Email to Us
Email to Us
Rated Power:0.7 - 14 MW
Working Pressure:0.7 - 2 MPa
Thermal Efficiency:98%
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