zozen boiler
Home Service FAQs FAQ of gas-fired(oil-fired) boilers Why gas-fired boiler chimney drops water?

Why gas-fired boiler chimney drops water?

01 Dec 2023

If you notice water dripping from a gas-fired boiler's chimney, it could be due to condensation, which is a common issue in high-efficiency boilers. Here are some key reasons and explanations for this phenomenon:

Condensation of Flue Gases: Modern high-efficiency gas boilers are designed to extract as much heat as possible from the combustion gases before they are expelled through the chimney. This process can cool the gases to a point where the moisture in them condenses into water. This is more common with boilers having a high-efficiency rating (typically condensing boilers) because they cool the flue gases below the dew point.

Inadequate Flue Gas Temperature: If the flue gas cools too much before exiting the chimney, it can cause condensation. This might happen if the boiler is oversized for the heating requirement, causing it to run short cycles and not allowing the flue gas to heat sufficiently.

Poor Chimney Design or Insulation: An improperly designed or insulated chimney can cool the gases too quickly, leading to condensation. The flue should be properly sized and insulated to ensure the gases remain hot enough until they are expelled.

Humid Climate Conditions: In areas with high humidity, the moisture content in the air can contribute to more condensation in the chimney.

Blockages or Leaks: Any blockage in the flue or leaks can cause the hot gases to cool down more rapidly than intended, leading to condensation.

Condensate Drain Issues: If the boiler is a condensing type, it will have a condensate drain to remove the water. If this drain is blocked or malfunctioning, it can cause water to back up and potentially leak out of the chimney.

Short Chimney Height: A chimney that is too short can cause the flue gases to cool down rapidly, leading to condensation.

It's important to address this issue because prolonged condensation can lead to corrosion of the chimney, boiler components, and can negatively impact the boiler's efficiency. It’s advisable to consult with a heating professional to diagnose the specific cause and rectify the issue. They may recommend solutions such as adjusting the boiler settings, insulating the chimney, or repairing the condensate drain system.

Related FAQs View More
Related news View More
  • ZOZEN Boiler: An Innovative Choice for Green Energy in the Pharmaceutical Industry
    In today's pursuit of health and environmental protection, the pharmaceutical industry is facing an energy revolution. Traditional steam boilers can no longer meet the industry's multiple demands for efficiency, environmental protection, and energy saving. Moreover, with increasingly strict environmental regulations and rising energy costs, pharmaceutical companies are becoming more cautious in their choice of boilers.   The pharmaceutical industry, a field related to life and health, has...
    19 Nov 2024
  • ZOZEN Biomass Boiler Brings Green Power for the Heritage and Innovation of Paper Industry
    In the heritage and innovation of traditional culture, China Xuan Paper Co., Ltd. plays an indispensable role. Xuan Paper, as an important medium for Chinese calligraphy and painting art, has extremely strict requirements for the environment and energy in its production process. With the company's development and the growth of market demand, the old boilers from the 1980s can no longer meet the increasing steam supply needs, making the selection of efficient and environmentally friendly steam bo...
    12 Nov 2024
  • ZOZEN Boiler Showcases at China Brew China Beverage 2024
    From October 28th to 31st, 2024, ZOZEN Boiler exhibited at the China Brew China Beverage 2024 (CBB 2024) held at the Shanghai New International Expo Center. As a benchmark exhibition for the entire industry chain of the liquid food industry in Asia, CBB serves as an important platform for ZOZEN Boiler to showcase its strength, expand its market, and promote international exchanges.   ZOZEN Boiler's Advanced Products Attract Wide Attention   At booth E1-D11, ZOZEN Boiler drew the ...
    05 Nov 2024

Find the Right Boiler For You

Name *

Email *

Products

Power/Capacity