FAN COILS AND CHILLED BEAMS
Fan coils vs AHUs
Andrews Sykes’ UK HVAC and specialist hire sales director, Carl Webb, discusses the advantages of fan coils and air handling units and what you should expect from a typical configuration.
W
hen people consider HVAC systems, they tend to think of conventional air conditioning or heating units as the sole source of climate control while completely overlooking the role that air handlers and fan coils often play.
Fan coils and air handlers both deliver total climate control by running on either chiller or hot water, depending on the requirement. Air handling units are commonly part of a commercial heating, ventilation or air conditioning system and will deliver heated or cooled air into a target location so that it can be distributed throughout an intended space. In some cases, air handlers may even have built-in filters to remove impurities from the
24 June 2019
air and they can have a significant impact in delivering safe and comfortable climate control across a multitude of applications. Older air handlers may only operate at one speed but most modern units off variable speed settings to allow adjustment as your demands change. A number of factors can affect the volume of cooling or heating required including the outdoor ambient temperature, your business requirements, the room’s capacity and even the condition of your air filter(s). A variable speed air handler therefore gives users a great degree of flexibility and allows you to control conditions more accurately. These units operate almost constantly at lower speeds and provide various benefits in the
process: ■ Consistent cooling – rather than producing large blasts of cool air like traditional air handling units, variable speed models will fluctuate according to the requirement at any particular moment. This prevents noticeable temperature swings and enables a far more consistent cooling process.
■ Improved air quality – variable speed aid handlers distribute air through filters extremely frequently because they have longer operating cycles. This means the environment in which the unit is deployed will benefit from a better quality of air because it is being continually filtered.
■ Economical performance – air handlers that
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