NEXPRO ACS is the domestic hot water heat pump designed by Riello for residential applications. The unit consists of a heat pump and a boiler. The heat pump, housed directly in the upper part of the boiler, uses the thermal energy of the air to heat domestic water. The air is drawn in by a centrifugal fan that allows recirculation or through a duct that allows air to be drawn in from outside. The recovered energy is transferred to the water by an external heat exchanger arranged circumferentially on the outer surface of the boiler, avoiding maintenance costs.

The high efficiency of NEXPRO ACS is linked to the use of an R1234-ze refrigeration circuit, which uses a high-efficiency compressor, an electronic expansion valve and a hot gas bypass valve to allow NEXPRO ACS to operate down to -5°C.

Both the 180-litre and 250-litre boilers are enamelled. For both sizes, a 1.5 kW electric heating element can be installed (standard for versions without a coil) to provide heating support, frost protection and an anti-legionella function.

The entire system is controlled and regulated by a control unit that makes use of smart management of the individual components.

– DHW production with temperatures up to 62 °C.

– High efficiency coefficient.

– Standard 1.5 kW backup electric heater (for versions without coil)

– NEXPRO 250 S DHW model can be combined with an additional heat source (solar or boiler)

– Possibility of connecting the unit to a photovoltaic system via Smart Grid connection (provided as an accessory)

– Corrosion protection thanks to magnesium anode and enamelled tank.

– Operating range -5°C/+35°C.

– Highest energy efficiency class: A+*.

* The energy efficiency class range for this product category is between F and A+