The installations discussed below concern new systems integrated according to the site's specific characteristics and energy objectives: wall-mounted heat pumps , wall-mounted air conditioners , central heat pumps , central air conditioners , multi-zone systems , air-to-water systems , PTAC/VTAC solutions, as well as ventilation (air exchangers, humidity control, fresh air supply). These systems are suitable for houses , multi-unit residential buildings , commercial spaces , and mixed-use buildings , based on a selection process that considers: • building envelope characteristics, volumes, and space distribution • occupancy profiles and operational constraints • thermal loads and air renewal/dehumidification requirements • efficiency, comfort, and seasonal stability objectives. The choice is not dictated by a single format, but by the alignment between actual load, site constraints, and expected performance.