Pompe à chaleur emerson Pompe à chaleur emerson Source google image: https://climate.emerson.com/resource/image/4141762/landscape_ratio16x9/600/338/7fa9d38bb58c2cea30925d013a319092/Fk/47d-defrost-and-49s-ac-heat-pump-controls-and–sureswitch-1.jpg