The Series GREENOx BT boilers offer excellent results in terms of efficiency and low pollutant emissions, using traditional burners (yellow flame) or low-NOx burners (blue flame).
These boilers are fitted with double skin third pass gas tubes which the boiler to operate with a return water temperature of 35 °C.
Owing to the low water temperature in the boiler and the particular shape of the flue gas passages inner surfaces, the flue gases exiting from the outlet of the boiler pass into a flue gas condenser installed downstream of the boiler, where the temperature of the gases drop below dew point. The droplets of condensate are then conveyed into the specially inclined flue ways, in order to drain.
The stainless steel AISI 316 Ti horizontal gas passes are characterized by tapered projecting parts obtained from a pressed plate heat exchanger.
The inner surface has a particular corrugated shape capable of transmitting both sensible heat (due to the fall in the flue gas temperature) and latent heat.
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