Air consumption is an important indicator for evaluating the quality of gas-fired boilers. It is also one of the standards that users measure when purchasing boilers. This data will directly determine the cost of the company's investment in boiler operation.
We use a 1 ton gas-fired steam boiler as the base to calculate the method for calculating the gas consumption of the boiler.
First, factors affecting the gas consumption of the boiler
1. Boiler heating area
Generally speaking, the larger the heating area is occupied in the whole boiler, the more heat is transferred to the boiler by the fuel combustion, and the fuel utilization rate is improved. On the one hand, the company saves more fuel.
2. Fuel calorific value and price
The calorific value of different types of fuels will also vary. The calorific value of natural gas combustion is 8600 kcal/m3, and the calorific value of diesel is 10240 kcal/kg. However, the cost of fuel should also be considered. comprehensive.
3. Boiler thermal efficiency
The thermal efficiency of the boiler is also closely related to the heating area. The larger the heating area, the better the heat transfer effect, which will increase the boiler thermal efficiency linearly, make the fuel utilization more complete, and the gas consumption cost less.
The condensing gas steam boiler produced by Fangfang uses a advanced condensation technology to set up a condensing recovery device near the flue. When the high-temperature flue gas passes through the device, the latent heat part encounters the condensed water to release heat, which is supplied to the boiler for absorption again. The thermal efficiency can be It is as high as 108%. In one year, it can save the company the fuel input cost of 50,000 to tens of thousands (depending on boiler capacity and maintenance quality).
4, boiler output
The output of a 1 ton boiler is 700,000 kcal, and so on. The output of a 10 ton boiler is 7 million kcal.
Second, the fuel consumption calculation formula
Fuel consumption = boiler output ÷ fuel calorific value ÷ boiler thermal efficiency.
According to the above method, the user can calculate the gas consumption of the gas steam boiler according to the various values provided by the boiler manufacturer, and more comprehensively understand the boiler and select the boiler equipment suitable for the enterprise.
We, Zhengzhou Fangkuai Boiler Co., Ltd. (Fangkuai), are excited to announce our participation in the Indonesia International Heating Technology Exhibition 2025. We will be showcasing our advanced boiler systems engineered for higher efficiency, lower emissions, and sustainable energy performance. Join us at Booth No. B1-08 from November 5–7, 2025 at the Jakarta Convention Center.
The event brings together EXPO BOILER, EXPO BIOMASS, EXPO PUMPS & VALVES, and EXPO CRANE — creating a comprehensive platform for technology exchange and business collaboration across the industrial heating and energy sectors in Southeast Asia.
At the exhibition, we will present our integrated solutions including biomass boilers, industrial steam systems, and full power plant EPC services. Our products emphasize:
Event Details
Date: November 5–7, 2025
Venue: Jakarta Convention Center, Indonesia
Booth: B1-08
We welcome industry partners, plant owners, EPC clients, and technology scouts to visit our booth and explore collaboration opportunities. Whether you are planning a biomass retrofit, a new power plant EPC project, or seeking high-efficiency boiler equipment, our engineers will be available for technical discussions and project consultations.
Visit our booth / Contact us












Wins Another Invention Patent
Brilliant Glory, Continuing to Write a Brilliant Chapter
Striving for "Innovation" and "Quality"
Focusing on Cutting-Edge Technologies
Creating New Momentum and New Advantages
Promoting the Continuous "Innovation" of New-Quality Productivity
On June 17th, our company was awarded another national invention patent. To date, the company has secured 162 national patents and 13 invention patents, and has been deeply involved in the formulation of eight national and industry standards. We continue to lead industry development with technological breakthroughs.

Overcoming challenges and achieving remarkable results
Attaching great importance to technological innovation
While pursuing superior quality, Fangkuai also attaches great importance to technological innovation.
Developing product diversity
To better meet the diverse needs of consumers, Fangkuai develops diverse product images during R&D and production.
Fangkuai family portrait

Gloriously writing a new journey
The company has always adhered to the philosophy of
"Building Character, Creating Quality Products"
Using technological R&D as the core driving force
Also promoting application
Effectively promoting technological advancement in the industry and engineering products
Future

Continued
Scientific and technological R&D and technological achievement transformation
Generate more core independent intellectual property rights
Solidly promote the company's high-quality development