Fan Coil Units
Ease of Installation, maintenance, efficiency and low energy waste with
EC Forward Curved Fans for Fan Coil Units
EC forward curved fans manufactured by Ecofit are the popular choice for integration into fan coil units that form part of the HVAC system in new and refurbished buildings. Fan coil units in new builds are generally fitted into the ceiling and recirculate the air inside the building. The fan coil unit is connected to a heating or cooling coil or both and as the air is drawn into the unit it is filtered to remove any particles of dust. The air is then forced through the heating or cooling coils to alter the temperature of the air accordingly before it is distributed back into the building via smaller ducting pipes in the system.
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Increasing Fan Coil Efficiency with Fan Failure Monitoring
The efficiency of fan coil units can only be maintained if fans are all running together at their desired operating points. When a fan fails the other fans must then speed up to pick up the duty. With this in mind we can appreciate the importance of monitoring fan units for fan failures. The Ecofit M41-A5 from Axair has on board failure monitoring, this benefit is an add on for other manufacturers making the unit a cost effective and effective choice when installing this type of application.
Fan Coil Top Tips: Run Multiple Fans at Lower Speeds
Running multiple fans, typically 2 - 5, at a lower speed has several benefits:
Lower noise – Noise produced varies with the Third power or the change in speed. It does not have a linear relationship. Two fans running at 50% together produce 50dBa in comparison to one fan running at 100% producing 60dBa to achieve the same operating point. This significant 10dBa reduction in noise when running two fans simultaneously is 1/8th the noise of lone fan working at full duty.
Efficiency – Two Fans running at 50% consume 48Wa combined energy while one fan running at full speed consumes 100Wa. A significant reduction in power usage when using two fans running simultaneously.
Fan coil manufacturers integrate EC fans over the standard AC versions to reduce energy consumption in line with the current energy efficiency regulations for buildings. Our double inlet double width EC centrifugal fans manufactured by Ecofit are a popular choice for heating and ventilation and offer over 90% more efficiency with up to 50% energy savings compared to conventional motors. Integrating EC fans can help towards reducing your overall energy usage, outgoing costs and contributes to reducing your overall environmental impact.
EC forward curved fans can easily be wired into an existing FCU and have many benefits such as adjustable speed settings which can be set during or after installation and will remain constant. The integrated controller allows for constant pressure and airflow modes in which case the fan will self-regulate its speed based on the demand settings under the changing conditions. This ensures there is no loss in performance as filters fill up. EC motors are maintenance free with minimal noise output making them the perfect solution for daily occupied spaces.
The Key Influence of Specific Fan Power
Specific Fan Power (SFP) is a parameter that quantifies the energy-efficiency of fan air movement systems. It is a measure of the electric power that is needed to drive a fan (or collection of fans), relative to the amount of air that is circulated through the fans. It is not constant for a given fan, but changes with both air flow rate and fan pressure rise. The SFP principle in fan selection is to choose a fan to deliver one flow at one pressure in a particular system using as less electrical energy as possible and all other factors being equal.