Ariston Nuos Plus R290 S2 WiFi A+ 110 Liter heat pump water heaterAriston Nuos Plus R290 S2 WiFi A+ 110 Liter heat pump water heater Nuos Plus R290 by Ariston is an air water heat pump water heater which is used to produce hot water for domestic use , therefore at a temperature lower than the boiling point, in domestic and similar environments. It must be appropriately connected to the sanitary water network and to the electricity supply and can use ventilation ducts for the inlet and outlet of the treated air. Heat