Hello everyone,
For the past few days, we have noticed (especially at night, as it is particularly quiet here) that a loud noise occurs in our bedroom (upper floor) for about 5 minutes. We still don’t know exactly what causes it, but we suspect it might be related to the heating system.
It sounds like a kind of humming (quite loud, so you can definitely hear it), which then disappears after a few minutes.
Here are some details about our house that might help with the analysis:
- Solid brick construction
- Two-story city villa with a basement
- 2x concrete ceilings
- Air-to-water heat pump fully installed inside the basement
- Central ventilation system in the basement
There are 4 ventilation ducts running under our bed in the bedroom—just to mention this, because at first we thought the noise had to come from the mechanical ventilation system. However, since the noise disappears, I’m now quite sure it is not caused by the ventilation system.
What else we have observed:
According to SolarEdge (photovoltaic system app), the noise occurs shortly after the heating peaks of the heat pump. So, I almost suspect that the noise happens when the underfloor heating heats up significantly.
On the upper floor (in the two children’s rooms and the bathroom), this noise is not heard at all—only in our bedroom.
Maybe someone has an idea what it could be? Unfortunately, my heating technician is currently on vacation, and I would like to gather opinions or ideas about the possible cause before talking to him.
I appreciate any tips!
For the past few days, we have noticed (especially at night, as it is particularly quiet here) that a loud noise occurs in our bedroom (upper floor) for about 5 minutes. We still don’t know exactly what causes it, but we suspect it might be related to the heating system.
It sounds like a kind of humming (quite loud, so you can definitely hear it), which then disappears after a few minutes.
Here are some details about our house that might help with the analysis:
- Solid brick construction
- Two-story city villa with a basement
- 2x concrete ceilings
- Air-to-water heat pump fully installed inside the basement
- Central ventilation system in the basement
There are 4 ventilation ducts running under our bed in the bedroom—just to mention this, because at first we thought the noise had to come from the mechanical ventilation system. However, since the noise disappears, I’m now quite sure it is not caused by the ventilation system.
What else we have observed:
According to SolarEdge (photovoltaic system app), the noise occurs shortly after the heating peaks of the heat pump. So, I almost suspect that the noise happens when the underfloor heating heats up significantly.
On the upper floor (in the two children’s rooms and the bathroom), this noise is not heard at all—only in our bedroom.
Maybe someone has an idea what it could be? Unfortunately, my heating technician is currently on vacation, and I would like to gather opinions or ideas about the possible cause before talking to him.
I appreciate any tips!
A
Alessandro22 Nov 2022 09:35Prager91 schrieb:
The unit is decoupled on a concrete base in the basement using edge insulation strips. I also installed the tiles correctly and always made sure to maintain decoupling at the tile skirting boards.
If it were not properly decoupled, wouldn’t it cause noise either continuously in the same room or more permanently? I mean all the air and water pipes running through the walls.
Prager91 schrieb:
The unit is decoupled on a concrete base in the basement using an edge insulation strip. I also installed the tiles correctly and always made sure to maintain the decoupling at the tile baseboards. If you hear a humming noise, I would suggest going down to the basement near the air-to-water heat pump to listen more closely.
My tower unit is also placed on a separately decoupled base. Even so, I can hear it in the bedroom when the doors are open. My wife doesn’t hear it.
I then close the utility room door and have installed an air seal at the bottom. After that, it is quite quiet, almost inaudible.
In the immediate area, the tower is quite noticeable during the cold seasons. 🙄
Additionally, noise is highly subjective. Ventilation is another example. What one person considers a noise that keeps them awake, another barely notices.
And yes, we also have a door with sound insulation to the utility room. When it is closed, it is basically quiet.
That’s why it is easy to distinguish between "airborne noise" and "structure-borne noise."
And yes, we also have a door with sound insulation to the utility room. When it is closed, it is basically quiet.
That’s why it is easy to distinguish between "airborne noise" and "structure-borne noise."
Mahri23 schrieb:
If you hear buzzing, I would go down to the basement and listen closely at the air-to-water heat pump.
My heat pump unit also sits on a separately decoupled base. Still, I can hear it through open doors all the way into the bedroom. My wife can’t hear it.
I then close the utility room door and have installed an air seal at the bottom. Then it’s pretty quiet, almost inaudible.
In the immediate vicinity, the heat pump is quite noticeable during the cold seasons. 🙄 We also have a sealed door in the basement. The heating runs at full capacity, and I don’t even hear it when I stand in front of the door in the equipment room.
face26 schrieb:
Just to add, noises are extremely subjective. Ventilation is another example. What one person perceives as noise and can’t sleep with, another barely notices.
And yes, we also have a door with sound insulation to the equipment room. When it’s closed, it is basically quiet.
That’s why it’s easy to narrow down what is airborne sound and what is structure-borne sound. It can’t be airborne sound, as I said—I don’t hear anything from the basement below... The noise must be coming through the walls or the floor... Of course, it could also be due to the decoupling not being done properly. I’m having my heating technician check it out over the weekend since he needs to replace something on the ventilation system anyway. Maybe he will have an idea.
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