Heat Recovery Systems
Extract stale, moistened air in tightly closed buildings, and deliver a balanced airflow with
Constant Volume Fans for Balanced MVHR Ventilation Systems
High-cost savings and better indoor air quality are just a few of the key advantages of energy efficient refurbishments and new building design using controlled ventilation with heat recovery. A ventilation system with heat recovery should always be operated in a balanced way. This is the only way to ensure long-term heat recovery efficiency of the ventilation unit, achieving energy savings compared with exhaust-only systems. Devices with automatically balanced and pre-set volume flow rates can secure a balanced operation on a permanent basis, reducing the ventilation heat losses and preventing structural damage through condensation because of trapped humid indoor air penetrating the thermal building envelope.
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Increasing MVHR Efficiency with EC Fans
The fan is the core of most air movement systems, it’s the work horse that moves air through duct work, filters and allows clean, warm, or fresh air to circulate effectively within the heat recovery process. Ventilation systems are built for both domestic and commercial properties so the fan speed can be set depending on the needs of each building. A slow to medium fan speed may be adequate for a domestic property but may need to run faster for busier commercial properties. Large ventilation systems can be equipped with a constant volume system which determines the volume flow rate by means of a measurement of the effective pressure at the fans inlet.
EC Single Inlet Fans with Constant Air Volume Control
Constant volume fans with energy efficient motors and integrated electronics and alarm signals, utilise the relationship between Speed (RPM) and the power consumption of the fans and the volume flow rate. On forward curved centrifugal fans such as those from Ecofit, the air flow rate can be clearly determined from their performance curves only, based on the rotational frequency and the power consumption. By comparing the actual and set values and the corresponding readjustment by the fan control, the flow rate can be kept constant regardless of the changing pressure drop in the duct work.
Double Inlet for Larger Airflows & Greater Performance
The same constant volume software is available for larger domestic applications using the GDS range of double inlet centrifugal fans, the RRE range of backward curved impellers or the GKHM range of energy efficient plug fans, enabling higher air volumes and system performance, resulting in a cost effective and energy saving device
