Condensing boilers are considered by many HVAC experts to be much more energy-efficient than regular gas boilers. The carbon-based fuel used by gas boilers produces a chemical reaction of carbon dioxide and steam, which then escapes into the air through a small chimney called a flue.
A condensing boiler stops this waste. Using a heat exchanger, a condensing boiler traps these hot gasses and recovers the heat from them, reusing them to heat your home and water. Sometimes they cool the flue gasses so well that the water vapour contained in the gas condenses out, which is why they are called 'condensing'.
Condensing Boilers Can Ensure a 90% Efficiency Rate. Not only is the condensing boiler a good option if you are concerned about your carbon footprint but condensing boiler manufacturers also claim that the efficiency rate of their products can reach up to 98%.
Condensing boilers cool the exhaust gas so much that they can be vented with CPVC or Polypropylene (plastic) pipe, instead of the steel venting required by conventional boilers. They produce cooler exhaust because the extra heat has been harvested and transferred to the water in your heating system.
Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency (typically greater than 90% on the higher heating value) by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted.
Condensing Boiler. If you've been doing research on boilers, you're sure to have come across the term "condensing boiler." With so many terms surrounding boilers and heating systems, it can be quite confusing. That's why we've created this guide on what a condensing boiler is, the implications, and prices.
Condensing Boilers. How does a boiler condense? A by-product of the combustion process is water vapor (steam). This is due to the combustion of the hydrogen content of the fuel and not from the water from within the vessel.
Design considerations for condensing boiler systems. In the design review of another project, we identified a warm-up loop around each condensing boiler. In non-condensing boiler systems, these warm-up loops mix supply and return water in order to maintain at least 140°F feedwater into the boiler.