VES develops low-noise heat-recovery AHU
Following independent tests in an anechoic chamber, VES has modified the design of its Ecovent air-handling unit to reduce the overall noise level. The tests by the University of Southampton’s Institute of Sound & Vibration to BS EB ISO 3744:2010 showed a higher sound and unwanted power level in the 100 to 250 Hz range, which directly related to the fan-blade pass frequency.
Assessing the fan-cradle design, case construction and acoustics materials helped reduce the sound power generated and sound migration through the case (case breakout).
The outcome is VES’s quietest heat-recovery unit, the Ecovent Acoustic, which is perfect for many educational environments. These units meet the requirements of BB93 ‘Acoustics for schools’ and have a heat-recovery efficiency of over 70%. Other features are low specific fan powers and BlueSense intelligent controls.