Why does my chimney or a combustion chamber emit smoke?
If aeration is higher than the chimney draught, the boiler will emit smoke. You need to investigate what is the purpose:
- inappropriate chimney (holes, pierces into other chimney ducts)
- too small height or section
- lack of insulation outside the chimney
- additional appliances connected to the same chimney duct
- polluted duct or boiler
- bad construction of an elbow or elbows (acute angles, too many elbows)
- lack of ascension of the flue duct (exhaust gases should flow slightly up after having left the boiler)
- flue duct too deeply in the chimney
- too big ventilation opening in the wall (it may generate opposite air direction)
Additionally, in boilers with an automatic aeration, air flow should be limited:
- by using a metal flap of a ventilator
- by setting up parameters in the steering of a boiler
-
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
-
DHL series biomass-fired steam boilerLive Chat20-75 t/h1.25-5.4 MPa
-
Email us
-
WhatsApp: +86 18861589035
WeChat: +86 13506150756
Live Chat
-
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
-
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
-
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