Pompe a chaleur sur installation existante
Source google image: https://professionnels.promotelec.com/wp-content/uploads/sites/3/2018/04/Sch%C3%A9ma-type-d%E2%80%99une-installation-PAC-en-rel%C3%A8ve-de-chaudi%C3%A8re-fioul-montage-en-s%C3%A9rie.gif