Fan Coil Unit - FCU HVAC
The Engineering Mindset・11 minutes read
Fan coil units (FCUs) are used to condition local air for temperature control in buildings like offices, bars, and homes, with cooling and heating coils supplied treated air through ductworks. Fresh air is supplied through the main Air Handling Unit (AHU) into the fan coil units, where it is treated and distributed through diffusers into the space, while recirculated air goes back into the unit or is extracted through a return duct.
Insights
- Fresh air is supplied to spaces through ductworks by the main Air Handling Unit (AHU), with fan coil units conditioning local air for temperature control through cooling and heating coils.
- Fan coil units consist of fans, heating and cooling coils, and drip trays to collect condensation, with recirculated air passing through the false ceiling and some extracted through return ducts, emphasizing the importance of air quality and circulation within buildings.
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Recent questions
What are fan coil units?
Fan coil units are common systems used in buildings to condition local air for temperature control. They consist of cooling and heating coils supplied with treated air through ductworks to meet space requirements.
How does fresh air enter fan coil units?
Fresh air is supplied from the main Air Handling Unit (AHU) through ducts to various rooms, with branches feeding fresh air into each space. It enters the fan coil unit separately from the main duct, is treated, and distributed through diffusers into the space.
What components are inside a fan coil unit?
Inside a fan coil unit, there are fans driven by small motors, heating and cooling coils fed by hot and cold water respectively. Condensation from cooling coils collects in a drip tray and is drained away, while treated air is pushed out through diffusers into the space.
How does recirculated air flow in fan coil units?
Recirculated air goes through the false ceiling and back into the fan coil unit, while some is extracted through a return duct. This process helps maintain air quality and temperature control within the space.
What is the role of the main Air Handling Unit in buildings?
The main Air Handling Unit (AHU) supplies fresh air to spaces, with connections to boilers and chillers for heating and cooling. Fan coil units require fresh air per hour and connections to heating and cooling sources to effectively condition the air in the building.
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Summary
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Fan Coil Units: Essential for Air Conditioning
- Fan coil units (FCUs) are common in various buildings like offices, bars, and homes, used to condition local air for temperature control.
- FCUs consist of cooling and heating coils supplied with treated air through ductworks to meet space requirements.
- Fresh air is supplied from the main Air Handling Unit (AHU) through ducts to various rooms, with branches feeding fresh air into each space.
- Fresh air enters the fan coil unit separately from the main duct, treated, and distributed through diffusers into the space.
- Recirculated air goes through the false ceiling and back into the fan coil unit, while some is extracted through a return duct.
- Inside a fan coil unit, there are fans driven by small motors, heating and cooling coils fed by hot and cold water respectively.
- Condensation from cooling coils collects in a drip tray and is drained away, while treated air is pushed out through diffusers into the space.
- Fan coil units can have multiple fans and coils, with water connections for temperature control, and may also include AC units or refrigerants.
- The main AHU supplies fresh air to spaces, with connections to boilers and chillers for heating and cooling, while fan coil units require fresh air per hour and connections to heating and cooling sources.
