Hello everyone,
we have an air-to-water heat pump located about 5–6 m (16–20 ft) from our bedroom window. At night, we wake up due to the noise from the unit, especially during the defrost cycle, when it becomes clearly audible. The manufacturer is no longer responding and says this issue needs to be resolved through an expert report.
I took the time to borrow a semi-professional sound level meter, a PCE Instruments PCE-322A Class II sound meter.
At 11 p.m., measured from a distance of 6 m (20 ft), I recorded a background noise level of 37 dB. When the heat pump is running, the levels increase to between 45.5 dB and 46 dB. This measurement was made outside the defrost cycle.
From what I understand, this noise level seems excessive, but I am not a technician.
Could someone help me evaluate these values?
Maybe this will encourage the manufacturer to take more responsibility.
Best regards and many thanks!
Stefan
we have an air-to-water heat pump located about 5–6 m (16–20 ft) from our bedroom window. At night, we wake up due to the noise from the unit, especially during the defrost cycle, when it becomes clearly audible. The manufacturer is no longer responding and says this issue needs to be resolved through an expert report.
I took the time to borrow a semi-professional sound level meter, a PCE Instruments PCE-322A Class II sound meter.
At 11 p.m., measured from a distance of 6 m (20 ft), I recorded a background noise level of 37 dB. When the heat pump is running, the levels increase to between 45.5 dB and 46 dB. This measurement was made outside the defrost cycle.
From what I understand, this noise level seems excessive, but I am not a technician.
Could someone help me evaluate these values?
Maybe this will encourage the manufacturer to take more responsibility.
Best regards and many thanks!
Stefan
H
HilfeHilfe14 Jul 2017 11:10Is it not possible to move it afterward?
Our builder did it the other way around. He warned us against placing it near the bedroom.
Our builder did it the other way around. He warned us against placing it near the bedroom.
Good evening,
if the measurement of 46dB(A) at 6 meters is correct, the device has a sound power level of 66-69dB (depending on the Q-factor / directivity factor). This means it is not particularly quiet. However, without information about the kW output, it cannot be properly classified. "Standard" devices for single-family houses should, according to current technology, have a sound power level of around 50-55dB. At 55dB, about 34dB would reach the bedroom window. This would be acceptable for a purely residential area. Since you are mostly disturbing yourselves and – I hope – not your neighbors, it is basically irrelevant except that you might have trouble sleeping.
The only option remains to purchase a "modern" quiet device according to current technology. These are naturally not cheaper than louder ones.
if the measurement of 46dB(A) at 6 meters is correct, the device has a sound power level of 66-69dB (depending on the Q-factor / directivity factor). This means it is not particularly quiet. However, without information about the kW output, it cannot be properly classified. "Standard" devices for single-family houses should, according to current technology, have a sound power level of around 50-55dB. At 55dB, about 34dB would reach the bedroom window. This would be acceptable for a purely residential area. Since you are mostly disturbing yourselves and – I hope – not your neighbors, it is basically irrelevant except that you might have trouble sleeping.
The only option remains to purchase a "modern" quiet device according to current technology. These are naturally not cheaper than louder ones.