NPG uses the eco-friendly refrigerant R32 characterised by a significantly lower GWP index than conventional refrigerant gases. Thanks to the adoption of a reduced diameter of the finned coil tubes combined with an optimisation of the cooling circuit components, the amount of refrigerant required can be significantly reduced. Furthermore, given the advantage of using a multi-purpose unit, combined with the optimised technology of the components, the NPG unit actively contributes to overall energy and CO2 emission savings.