binnenunit

Binnenunit is the indoor component of a split air conditioning or heat pump system. In Dutch HVAC terminology, the term binnenunit refers to the indoor unit. It is connected to an outdoor unit by refrigerant lines and electrical cables. The binnenunit houses the evaporator coil, a blower, and air filtration; it also contains a drain for condensate produced during cooling or dehumidification. Its primary function is to condition and distribute indoor air by cooling, heating, and dehumidifying as required by the operating mode.

Common configurations for the binnenunit include wall-mounted units, ceiling-mounted (cassette) units, floor-standing models, and ducted systems. The choice depends on room layout, noise considerations, and architectural preferences. In multi-split installations, several indoor units can be served by a single outdoor unit, allowing independent temperature control in different zones.

Operation relies on a refrigeration cycle. The evaporator in the binnenunit absorbs heat from room air; the blower circulates air across the coil, which is cooled or heated as the refrigerant changes state in the outdoor unit. The resulting air is blown back into the room. Condensed moisture is drained away via a condensate line. In heating mode, many systems operate as heat pumps using reverse-cycle operation.

Installation and maintenance require qualified technicians. Proper placement affects performance and noise; regular cleaning of filters and inspection of the condensate drain are advised. Efficiency is indicated by industry ratings such as SEER or SCOP and is influenced by refrigerant type and system design.