As an air to drinking water monobloc heat pump, it operates proficiently working with eco-welcoming R290 refrigerant, furnishing sustainable heating with an impressive A+++ Power efficiency rating. The refrigerant in an air-source heat pump absorbs heat through the outdoor air and turns right into a fuel by means of evaporation. https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/