When it comes to heat pumps, discussions often focus on efficiency, performance, and cost. In everyday use, however, another factor determines whether a system truly performs well: acoustics.
Outdoor heat pumps, in particular, are installed where people live—next to the house, in the garden, near terraces, or close to neighboring properties. That’s why a modern heat pump must not only provide reliable heating, but also operate quietly enough to go largely unnoticed in daily life.
At Elephant Power, we therefore design the ElephantONE consistently with low noise emissions in mind.
Reducing noise at its source
The primary noise sources of a heat pump are the fan and the compressor. This is exactly where our acoustic concept begins.
For the fan, we use a noise-optimized design: adapted blade geometry, additional noise-reduction features, and a larger fan design. This allows the fan to operate at lower speeds—reducing noise directly at the source.
For the compressor, we follow a multi-stage approach: a low-vibration dual-rotor compressor, additional sound insulation, and an acoustically insulated enclosure for the heat pump system.
Noise-optimized fan of the ElephantONE
Quiet operation—especially at night
Technical noise is perceived more strongly at night. That’s why we develop the ElephantONE with a Silent Night Mode that acoustically optimizes operation during sensitive time periods.
The integrated system architecture plays a key role here: heat pump, storage, battery, and control system work together as a coordinated overall system. This enables more flexible heat generation and storage—avoiding unnecessarily noisy operating points.
Our development targets are clear:
BEG eligibility from 2026
−10 dB below Ecodesign requirements
Nighttime noise levels compliant with TA Lärm in typical installation scenarios
ElephantONE as a quiet outdoor energy system at a residential building
Acoustics as a core product principle
A heat pump is not only good when it operates efficiently—it must also work where people live.
That’s why we treat acoustics not as an add-on feature, but as an integral part of the product concept. Noise is reduced directly at the fan and compressor, its propagation is deliberately controlled, and system operation is intelligently managed.
Because in everyday life, it’s not just about how efficiently a heat pump works—
but also how unobtrusively it does so.
