As an air to drinking water monobloc heat pump, it operates successfully using eco-pleasant R290 refrigerant, giving sustainable heating with a formidable A+++ Electrical power efficiency rating. The refrigerant within an air-source heat pump absorbs heat in the out of doors air and turns into a fuel as a result https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/