Efficient Sound Insulation for Heat Pumps
Introduction
In densely populated residential areas, operating air-to-water heat pumps is often a legal and neighbourly challenge. Conventional soundproof enclosures are frequently:
Too bulky: they consume valuable space in gardens or on balconies.
Susceptible to weather: mineral wool absorbs moisture, loses effectiveness and can deteriorate.
Performance-reducing: excessive flow resistance causes icing problems and reduces pump efficiency.
Solution

Using Absora-sheet (aluminium or stainless steel), a highly effective, slim and weatherproof soundproofing solution can be implemented, tuned directly to the frequencies of the heat pump.
Why Absora-sheet is the ideal choice for heat pumps:
Weatherproof & hydrophobic: unlike open-pored foams or wool, Absora-sheet is completely resistant to rain, snow and humidity. Its acoustic performance remains constant for decades.
Compact design: thanks to high absorption at low material thickness, the enclosures can be built much slimmer. This saves space and looks more refined.
Optimal flow technology: the smooth surface and precise micro-perforation minimise pressure loss. The heat pump needs less effort to draw in the required air, which keeps the COP value stable.
Hygiene & maintenance-free: no fibre release into the environment, and easy cleaning by rinsing with water.
Results
Acoustics: significant reduction of low-frequency emissions for near-inaudible operation during evening and night hours.
Sustainability: 100% recyclable metal, with no environmentally harmful foams or composites.
Design: the narrow wall thicknesses enable compact, attractive designs that blend seamlessly into modern architecture.
