Home
Service
FAQs
FAQ of gas-fired(oil-fired) boilers
What impact will excess air have on boiler performance?
What impact will excess air have on boiler performance?
03 Jan 2020
Excess air provides safe operation above stoichiometric conditions. A burner is typically set up with 15% to 20% excess air in higher firing ranges. Higher excess air levels result in fuel being used to heat the air instead of transferring it to usable energy, increasing stack losses and significantly decreasing efficiency. Boilers with lower excess air throughout the operating range have higher efficiencies.
Related FAQs
View More
Related products
View More
-
WNS series gas-fired (oil-fired) hot water boilerLive Chat0.7-14 MW0.7-1.25 MPa
-
SZS series gas-fired (oil-fired) steam boilerLive Chat2-110 t/h1.25-5.3 MPa
-
SZL series coal-fired steam boilerLive Chat6-35 t/h1-2.5 MPa
By boiler medium
By boiler structure
-
Email us
-
WhatsApp: +86 18861589035
WeChat: +86 13506150756
Live Chat

Related news
View More
-
In industries such as chemicals, plastic packaging, new materials, and building materials, thermal energy supply is closely related not only to production continuity, but also to product quality and operating costs. As companies place higher requirements on process temperature control, fuel adaptability, and system stability, thermal oil boilers are becoming an important heat source in many industrial applications. Based on different fuel conditions and production needs, ZOZEN Boiler continues t...02 Jun 2026 -
Packaging connects production with consumption. A carton, a piece of corrugated board, or a roll of plastic film may look light and simple, but behind each of them is a stable, continuous, and process-matched thermal energy system. As demand continues to grow in food packaging, industrial packaging, e-commerce packaging, and plastic packaging, the packaging industry is placing more specific requirements on boiler equipment: stable steam supply, fuel adaptability, process temperature control, ope...26 May 2026 -
When an industrial boiler arrives on site, what first catches a customer’s attention is often not the specification sheet, but the overall appearance of the equipment in the plant environment. For boiler equipment, exterior design is not only about visual presentation; it also reflects the manufacturer’s approach to product details, on-site management, and brand image. ZOZEN Boiler has upgraded the exterior of its SZL series biomass boiler, presenting a more unified visual design and...19 May 2026
Latest cases
View More











