Le Bon Split — a sizing desk for heat-pump installers

Field notes

The workflow begins with building conditions rather than a product list: surface, construction year, insulation, rooms, and postcode feed a heating-and-cooling estimate. The page says the heating calculation uses the local NF EN 12831 design temperature and compares manufacturer-published temperature steps, while cooling also considers inverter modulation floors. Its displayed catalogue covers 108 mono-split models, 38 multi-split groups, 136 indoor units, and 3,416 combinations.