Use Case • HVAC Industry
A European HVAC manufacturer needed to reduce noise from a reversible ventilation heat pump to a subjectively pleasant and marketable level. Sontech delivered a solution that lowered the noise level by 4 dB(A).
The customer — a European HVAC manufacturer — had developed a reversible ventilation heat pump for heating and cooling homes and public premises. Fresh air is drawn in through the heat pump, which places high demands on low noise levels.
The measurement showed 48 dB(A) in a 9×8 m room, with the microphone at 1.25 m height and 1 m distance from the unit. The fan was running at its lowest speed where fan noise was dominant. The level was considered too high to be marketable.
The goal was to reduce noise to a subjectively pleasant and marketable level.
Sontech analyzed the noise sources and identified structure-borne noise from the fan as the dominant problem. A combination of vibration isolation and acoustic damping was applied:
By eliminating the structure-borne fan noise, a clear and measurable improvement in the acoustic environment was achieved.
The following Sontech products were used to achieve the desired noise reduction:
25 mm self-adhesive sound absorbent. Fire rated UL94HF1. Applied to the front plate and around the fan for effective sound absorption.
Self-adhesive vibration damping mat. Fire rated UL94V0. Applied to the front plate and around the fan to reduce vibrations.
Bitumen-based insulation mat, 7.5 kg/m². Applied to the fan housing to dampen structure-borne noise from the fan.
Our acoustic engineers will help you find the right solution to reduce unwanted noise in your products.