Innovative Noise Reduction ..........By Design

INVC / SDS Quiet Fan Technology

Readings at 1 metre

Hi Les, the council have been out and done their test they said the tonal noise has gone and the resident is happier. Thanks. David

Quiet Fan Technology (QFt)
fan noise reduction without silencers

Qft reduces tonal noise at source at a fraction of the cost of  traditional techniques such as silencers and enclosures. Moreover, it achieves this noise reduction without the increased power consumption associated with conventional silencers, lasts the lifetime of the fan without maintenance and can be retro-fitted with little down-time. Applications include: extract fans, ID fans, chillers, air conditioning plant, process and ventilation fans, HVAC systems... Click for video