Fan coil unit

A Fan Coil Unit (FCU) is a simple device consisting of a heating and or cooling heat exchanger or 'coil' and fan. It is part of an HVAC system found in residential, commercial, and industrial buildings. A fan coil unit is a diverse device sometimes using ductwork, and is used to control the temperature in the space where it is installed, or serve multiple spaces. It is controlled either by a manual on/off switch or by thermostat, this in turn controls the throughput of water to the heat exchanger using a control valve and/or the fan speed.

Due to their simplicity and flexibility fan coil units can be more economical to install than ducted 100% fresh air systems (VAV) or central heating systems with air handling units or chilled beams. Unit configurations are numerous including horizontal (ceiling mounted) or vertical (floor mounted).

Noise output from FCUs like any other form of air-conditioning is principally down to design of the unit and the building materials around it, a correctly selected FCU particularly those from the UK can offer noise levels as low as NR25or NC25