zozen boiler
Home Service FAQs FAQ of gas-fired(oil-fired) boilers What's the difference between WNS series gas-fired (oil-fired) boilers and SZS series gas-fired (oil-fired) boilers?

What's the difference between WNS series gas-fired (oil-fired) boilers and SZS series gas-fired (oil-fired) boilers?

12 Feb 2019

1. In terms of boiler body structure, WNS series gas-fired (oil-fired) boilers are fire tube boilers; SZS series gas-fired (oil-fired) boilers are water tube boilers;

2. In terms of boiler working pressure, if the boiler pressure is below 1.6Mpa, the choice is usually the WNS series gas-fired (oil-fired) boiler, if the boiler pressure is above 1.6Mpa, the SZS series gas-fired (oil-fired) boiler may be a better solution.  Some high-pressure boilers also adopted SZS series gas-fired (oil-fired) boiler's structure;

3. In terms of boiler capacity, due to the limitation of structural style and transportation, the rated evaporation of WNS series gas-fired (oil-fired) steam boiler usually is below 20 tph, the rated thermal power of WNS series gas-fired (oil-fired) hot water is below 14 MW;

4. In terms of installation method, the WNS series gas-fired (oil-fired) boiler is a packaged boiler. For the SZS series gas-fired (oil-fired) steam boiler, when the rated evaporation is under 35 tph, it is a package boiler, 40-55 tph is a shop-assembled boiler, and when above 55 tph is a field-assembled boiler; For the SZS series gas-fired (oil-fired) hot water boiler, when the rated thermal power is under 29MW, it is a package boiler, 29MW-58MW is a shop-assembled boiler, and when above 58MW is a field-assembled boiler.

Related FAQs View More
Related news View More
  • ZOZEN Boiler Supports Green Development of Enterprises in Zhejiang with Low Nitrogen Emission Advantages
    Zhejiang Province has always prioritized ecological and environmental protection as a fundamental aspect of its development, continuously promoting energy conservation, emission reduction, and green transformation in the industrial sector. In this process, ZOZEN Boiler has established itself as a reliable partner for numerous enterprises in Zhejiang by leveraging its long-standing expertise in low nitrogen emission technology. Its service cases span various fields, including chemicals, energy, t...
    30 Sep 2025
  • Specialty Lubricants Company Installs ZOZEN Boiler 4 Million Kcal Gas-Fired Thermal Oil Heater
    Recently, the 4 million kcal YQW series gas-fired thermal oil boiler introduced through the cooperation between Hangzhou Derunbao Oil Co., Ltd. and ZOZEN Boiler has been installed and is currently in the commissioning stage. Centered on the design concepts of high efficiency, intelligence, and safety, this project has had a positive impact on energy saving, consumption reduction, and optimization of plant space layout. Strong Partnership Between Hangzhou Derunbao and ZOZEN Boiler   Ent...
    23 Sep 2025
  • Under Hubei’s Environmental Policies, ZOZEN Boiler Powers Enterprises’ Green Upgrades
    In 2025, Hubei Province continues to intensify efforts in ecological and environmental protection, fully implementing the pollutant discharge permitting system and shifting from dual control of energy consumption to dual control of carbon emissions. This series of policies defines a clear pathway for the green development of industrial enterprises. Against this backdrop, ZOZEN Boiler, leveraging its technological strengths and targeted solutions, has become a key partner in the green transformat...
    16 Sep 2025

Find the Right Boiler For You

Name *

Email *

WhatsApp/WeChat

Products

Power/Capacity