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.
All Westinghouse boilers are wall-hung, âfire tubeâ gas boilers. This means that hot gasses are used to heat a tube surrounded by water. Historically, this is the type of boiler used for steam locomotives. Today, however, it is generally regarded as the most efficient way to heat water for a residential boiler.