Are Air Source Heat Pumps Noisy? | Noise Guide | EcoSphere Energy
Buyer’s Guide · Common Concerns
Are Air Source Heat Pumps Noisy?
Heat pump noise is one of the most common concerns we hear. The short answer: modern heat pumps are quiet — quieter than many home appliances. Here’s what you need to know.
How Loud Is a Heat Pump?
Modern heat pumps are rated between 40 and 55 dB(A) at 1 metre. Here is what that means in context.
40–45 dB(A): Very Quiet
Premium models like the Vaillant aroTherm Plus operate at around 40 dB(A). This is comparable to a quiet library or a refrigerator hum. You would not hear it from inside the house.
45–55 dB(A): Moderate
Mid-range units operate at 45–55 dB(A) — similar to normal conversation or a desktop fan. This is noticeable if you are standing next to the unit, but not from inside the house or at the boundary.
In Practice
Heat pumps are quieter than a gas boiler flue, a tumble dryer, or an air conditioning unit. Most neighbours never notice them. Correct positioning is the most important factor in minimising noise impact.
Positioning to Minimise Noise
Where we place the heat pump has a bigger impact on perceived noise than the unit itself.
Distance from Boundaries
Under Permitted Development rules, the heat pump must be at least 1 metre from your boundary. We position units as far from boundaries and windows as practical, which significantly reduces noise impact on neighbours.
Away from Bedrooms
We avoid placing the outdoor unit below bedroom windows. On south or east-facing walls, away from sleeping areas, the unit is barely perceptible even at night when ambient noise is lowest.
MCS Noise Assessment
MCS requires us to complete a noise impact assessment before installation. We calculate the expected noise level at your boundary and nearest neighbour’s window to confirm compliance.
Quiet, Efficient & Grant-Funded
Modern Heat Pumps Are Quieter Than Ever
The latest heat pumps from Vaillant, Daikin, and Mitsubishi are whisper-quiet. Oil and LPG homes can claim up to £9,000 toward the full installation cost.
Check your eligibilityGet a Free Quote — Noise Assessment Included
Every EcoSphere Energy quote includes a site visit to assess the best position for the heat pump, including MCS noise compliance.