Wall-Mounted Fan Coil Units

Wall-mounted fan coil units provide room-level temperature control within central water-based heating and cooling systems. Although their appearance resembles a wall split air conditioner, they do not contain an independent compressor or refrigerant circuit. The unit is connected by water pipes to a chiller or another suitable chilled- and hot-water source. As no suspended ceiling is required, this format suits apartments, hotel rooms, private offices and individually controlled zones.

The Midea MKG range covers 250, 300, 400, 500 and 600 CFM size classes. Different front-panel versions are available, while the basic operating arrangement uses a two-pipe water circuit and multiple fan speeds. In a two-pipe installation the same pipework carries chilled or hot water according to the season. Changeover therefore depends on the central water system and controls rather than on the indoor unit alone.

Floor area is only a starting point when selecting a wall-mounted fan coil. The calculated cooling and heating load, airflow at each fan speed, entering-water temperature, water flow, pressure drop and acoustic requirements must also be assessed. Pipe direction, condensate outlet and valve-set position should be checked before installation. An oversized unit may cycle unnecessarily, while an undersized unit may not maintain the required room temperature under design conditions.

The casing must be installed level, the condensate line should maintain a continuous fall, and chilled-water pipes require reliable insulation. Depending on the MKG version, available features may include multi-directional pipe connections, an automatic swing louver and a three-way valve; exact equipment should be confirmed for the selected model. A removable front panel and accessible filter simplify routine cleaning. Electrical wiring and room controls must follow the product diagram.

Alternative indoor-unit formats are listed under fan coil systems. Chillers, pumps and other central HVAC equipment can be reviewed in cooling and ventilation systems. Final model selection should be supported by a technical load calculation and the actual operating conditions of the building.