Xpressflo Condensing HW Generator

The Xpressflo range of hot water generators delivers not only high volumes of hot water but consistently high efficiency is achieved through the novel principles that are employed in the basis of its operation. A gas fired low emission condensing unit is utilised in conjunction with stainless steel storage vessels of 300 or 500 litres.

To maximize the potential to operate in condensing mode, the cold feed connection into the storage vessel of the Xpressflo is positioned optimally to inject the cold refilling water towards the intake of the tubing system which delivers the water into the condensing heating unit.

This working principle ensures that at all times the lowest possible water temperature at any given time is passed over the condensing heat exchanger thus cooling the exhaust gases to below dewpoint under almost all operating conditions. Additionally, the Xpressflo is quick to respond, using a reverse of the cold feed principle, hot water is injected toward the outflow connection on the storage vessel allowing the unit to deliver hot water in an almost instantaneous way.
 
All units have a powerful heat input of 60kW which allows up to 650 litres of water raised through 50ºC to be drawn from the model 500 in just 10 minutes. And although the prime function of the Xpressflo units are to deliver efficiently generated voluminous hot water, they can also, if required deliver a central heating service of up to 40kW whenever there is no hot water load.
 
Low NOx premix burner system coupled with a room sealed flue capability using either 80/125mm concentric flue or 2 x 80mm parallel tubes are additional standard features as is the provision of a secondary return circulation pump which is factory fitted and pre-wired.