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Fixed PlateHeat PipeFansUnit CasingIAQ HoodHeating & CoolingElectricalAir CooledWater CooledAccessories
Fixed PlateHeat PipeFansUnit CasingIAQ HoodHeating & CoolingElectricalAir CooledWater CooledAccessories
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Quality fans are crucial for high performance. Therefore, Annexair uses direct drive plenum fans from a major European manufacturer. Direct drive fans (DDF) have a number of definitive advantages that led us to offer them as our standard fans: Reduced Maintenance and Service Costs A direct drive fan does not require maintenance. There are no parts that can wear out or break. The routine maintenance of lubrication and belt adjustment is eliminated, as well as service calls related to belt/pulley mechanism malfunction. With the rising costs of maintenance labor, maintenance expenses savings to building owners can reach 20-30%. Low Noise Level Much of the noise in ventilation units is created by the moving belts. Without a belt, the sound level is frequently lower by 3-9 dBA. As a result, sound attenuation components can be smaller, or, in some cases, eliminated altogether. Motor Longevity By design, DDFs must be controlled by a variable frequency drive (VFD). The controller acts as a soft start, greatly reducing the stress on the motor and therefore minimizing the risk of motor failure. Better System Efficiency |
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Lower Power Consumption
With the variable frequency drive, the fan can operate below the motor's FLA, thereby using only the amount of energy required to maintain airflow.
Dual Fan Configuration
It is always more cost effective to use two smaller fans with two smaller motors and only one VFD (one controller can operate many fans) than a single large fan and motor. In addition, a dual fan configuration is usually lighter and more compact. Studies show that airflow is more evenly distributed with two or more fans due to reduced pressure gradients across the fan.