Unit description The new i-NRG heat pump provides exactly the energy required by the system, perfectly following the real load of the building, thanks to the modulation of the DC inverter fan. One single unit for the highest efficiency, sustainability and huge savings, thanks to the advantages of DC frequency driven fans and circulating pumps (inverter) for both plant and domestic hot water circuits. i-NRG is the new generation heat pump for all year round operation in any operating mode: single cycle (air conditioning, heating, domestic hot water) as well as combined cycle in total heat recovery (domestic hot water together with cooling). Domestic hot water production is guaranteed by the dedicated exchanger for heat recovery: total, for free domestic hot water production, or partial. Domestic hot water is stored in a properly dimensioned storage tank. The unit can be installed indoor or outdoor, thus ensuring complete flexibility. Extended operating limits for all year, specially in heating: -Maximum flow temperature 60°C -Maximum external air temperature 45°C -Minimum external air temperature -15°C Versions - - Basic Features Structure and base in hot galvanised epoxy powder coated steel. High efficiency and low drop stainless steel plate exchanger (at the domestic hot water side). It is positioned next after the compressor, it ensures the domestic hot water production. That can work either in full recovery or in part, with the constant optimization of efficiency through logic advanced adjusting controller