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 Heat How Do Boilers Work? Boilers are vital parts of a home heating system considered to be more efficient and cost-effective than the other methods. They serve as the heating plants where hot water or steam for hydronic baseboard, radiant heat or steam radiator heating systems are generated.