As an air to h2o monobloc heat pump, it operates efficiently employing eco-welcoming R290 refrigerant, providing sustainable heating with a formidable A+++ energy efficiency score. Employing electric power, the pump compresses the liquid to increase its temperature. It then condenses back into a liquid to release its saved heat. R290 https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/