Inside a dry system, this heat is circulated as warm air by means of ducts and vents. Air-to-air heat pumps can flow into either very hot or chilly air. One or more[nine] indoor condenser heat exchanger coils. They transfer the heat into the indoor air, or an indoor heating program https://purethermal.co.uk/media-news/q4-launch-lithium-large-capacity-r290-ashp-from-pure-thermal-and-enerblue/