zozen boiler
Home Service FAQs Boiler basics What are the temperatures of outlet water and return water of the boiler respectively?

What are the temperatures of outlet water and return water of the boiler respectively?

03 Feb 2023

The principle of heating boiler is that after water enters the boiler, it absorbs the heat released by fuel combustion, and the hot water with a certain temperature and pressure is led out and transported to the heat exchange station for heat exchange and then returned to the boiler. The outlet water temperature and backwater temperature of boiler are important technical parameters in the system, and there are clear specifications. So, do you know the specifications of outlet water temperature and backwater temperature of boiler?

 

The return water temperature of boiler is the temperature of circulating water at the inlet of boiler in heating system. Theoretically, the higher the return water temperature of the boiler, the less heat required for reheating to the outlet water temperature, the smaller the fuel consumption and the higher the economic benefit.

 

China's heating design has adopted the following regulations: the outlet temperature and backwater temperature of the boiler are 95℃ and 70℃ respectively, and the temperature difference is 25℃. However, in recent years, according to the advanced experience of heating at home and abroad, the difference between the outlet water temperature and the return water temperature of the boiler has a downward trend, and the outlet water temperature and the return water temperature of the designed boiler are 80/60℃ with a temperature difference of 20℃.

 

Effluent temperature and backwater temperature of ZOZEN Boiler

Wuxi ZOZEN Boiler Co., Ltd. is an A-class boiler manufacturing enterprise integrating design, manufacture, sales, installation and service. With the accumulation of manufacturing boilers for more than 30 years, the company has formed a variety of specifications such as gas boilers, biomass boilers, coal-fired boilers, circulating fluidized bed boilers, and thermal oil heaters, which are widely used in chemical industry, food, brewing, heating, paper making, printing and dyeing, rubber and other industries.

 

ZOZEN heating boilers have a full range of models, including gas-fired hot water boilers, oil-fired hot water boilers, biomass hot water boilers and coal-fired hot water boilers. The capacity of a single boiler covers 0.7-116MW, and the outlet water temperature and return water temperature of boilers are basically 95/70℃, 115/70℃ and 130℃/70℃. Among them, gas-fired boilers are widely used in the field of central heating because of their high efficiency, energy saving and environmental protection, automatic intelligent control and so on.

Related FAQs View More
Related news View More
  • ZOZEN Boiler: Empowering High-Quality Development in the Building Materials Industry
    The continuous growth of the building materials industry places higher demands on thermal energy supply in production—stable steam output, efficient energy utilization, and emissions that meet environmental standards have become core criteria for selecting boiler equipment. Leveraging a deep understanding of industry-specific production needs, ZOZEN Boiler provides customized products and technical advantages to deliver reliable thermal energy support for building materials enterprises at ...
    21 Oct 2025
  • ZOZEN Boiler Breaks the High Humidity Biomass Combustion Challenge with Reciprocating Grate Biomass Steam Boiler
    ZOZEN Boiler Breaks the High Humidity Biomass Combustion Challenge with DZW Series Reciprocating Grate Biomass Steam Boiler Recently, Jinzhi Morning Hong Paper Co., Ltd. (hereinafter referred to as "Morning Hong Paper") reached an important cooperation with ZOZEN Boiler, successfully introducing the DZW series reciprocating grate biomass steam boiler. This brings new impetus for efficient and green production to the company. As a leading paper product manufacturer in North China, Morning Hong P...
    14 Oct 2025
  • ZOZEN Boiler to Showcase at Heatpower Expo 2025 in Moscow, Russia
    From October 21 to 23, the Heatpower Expo, Russia’s premier industrial boiler and heat exchange exhibition, will be held at the Crocus International Expo Center. As a benchmark event in the industrial boiler and heat exchange equipment sector in Russia, the expo serves as both a window into industry trends and a high-energy platform for fostering practical cooperation. ZOZEN Boiler’s Russian-speaking sales team will participate with its core boiler solutions, demonstrating clean, eff...
    07 Oct 2025

Find the Right Boiler For You

Name *

Email *

WhatsApp/WeChat

Products

Power/Capacity