As an air to water monobloc heat pump, it operates proficiently working with eco-welcoming R290 refrigerant, supplying sustainable heating with a powerful A+++ Power effectiveness score. Many of the maintenance needs for air source heat pumps replicate that of typical air conditioning and furnace installations, which include common air filter https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/