Condensing wall-hung boilers
Condensing wall-hung boilers could use so called "latent heat" that contents in the flue smoke gases. It is a heat of vaporized water that was build due combustion chemical reaction from the gas and oxygen from air - this water immediately after its building absorbs the certain part of heat energy from hot flame and becomes a steam, and it is not so easy to take this part of heat energy back and use it for heating. Unlike conventional boilers the condensing boilers could take this "latent heat" back from flue smoke gases - because special technology they can make the smoke gases cooler and steam from smoke gases being condensed inside special construction of heat exchanger and give it "latent heat" back to the heating water. Comparing with conventional boilers the condensing boilers have efficiency more than 100% (normally about 106-108% comparing with 90-91% by conventional boilers).
CROWN GOLD series are the premium sector condensing wall-hung boilers with high output 28 and 40kW for more comfort heating and domestic hot water supply
DUKE Series are the premium sector condensing wall-hung boilers with output 18 and 24kW
PRINCE series are the premium sector condensing wall-hung boilers with advanced technology and output 18 and 24kW