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.
Soot Blowers. Soot blowers are installed in most boilers for the removal of entrained soot and ash susceptible to slagging and fouling. Natural gas (or such clean fuel)-fired boilers are exceptions because there is no ash in the fuel to deposit on the HSs. Soot blowers remove.