Introduction

A fan coil unit (FCU) is a device consisting of a heat exchanger (coil) and a fan. As part of an HVAC system found in residential, commercial, and industrial buildings, a fan coil unit is often connected to ductwork and a thermostat to regulate the temperature of one or more spaces. The thermostat controls the fan speed and / or the throughput of water to the heat exchanger using a control valve. The output from an FCU can be established by looking at the temperature of the air entering the unit and the temperature of the air leaving the unit, coupled with the volume of air being moved through the unit. This is a simplistic statement, and there is further reading on sensible heat ratios and the specific heat capacity of air, both of which have an effect on thermal performance.

Fan Coil Unit falls pricipally into two main type: blow through and draw thorugh. As the names suggest, in the first type the fans are fitted behind the heat exchanger, and in the other type cosniderd thermally superior, as ordinarily they make better use of the heat exchanger. However, they are more expensive, as they require a chassive to hold the fans whereas a blow-through unit typically consist of set of fans botled straight to a coil. A fan coil unit may be concealed or exposed within the room or area that it serves. The coil recieves hot or transfer. Traditionally fan coil unit cantain their own internal thermostat, or can be wired to operate with a remote thermostat. However, and as is common in most modern buildings with a Building Energy Management System (BEMS), the control of the fan coil unit will be by a local digital controller or outstation (along with associated room temperature sensor and control value actuators linked to the BEMS via a communication network, and therefore adjustable and controllable from a central point, such as a supervisors head space. the unit gets hot or cold water from a central plant, or mechanical room containing equipment for removing heat from the central building's close d-loop. The equipment used can consist of machines used to remove heat such as a chiller or a cooling tower and equipment for adding heat to the building's water such as a boiler or a commercial water heater.

• Offices
• Showroom
• Hotels Rooms
• Condominius
• Also installed where Patio Doors & French Doors are used.