The CE mark, or formerly EC mark, is a mandatory conformity marking for certain products sold within the European Economic Area (EEA) since 1985. The CE marking is also found on products sold outside the EEA that are manufactured in, or designed to be sold in, the EEA.
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.
Boiler operation and maintenance is. therefore a good place to start when looking for ways to reduce energy use and save money. How Boilers Work. Both gas and oil fired boilers use controlled combustion of the fuel to heat water. The key boiler. components involved in this process are the burner, combustion chamber, heat exchanger, and controls. Figure 1: Firetube Boiler (image source: www.hurstboiler.com) The burner mixes the fuel and oxygen together and, with the assistance of an ignition device, provides a. platform for combustion.