We have 16 HR92's, (12 + 2) are fitted to fairly modern double panel radiators and 2 to stainless steel towel radiators.
HR92 actuation noise was considered in this household (by XYL) to be a problem, but now the noise has all but gone! What's changed?
The old Ideal Standard boiler was replaced last week with a Bosch System-i type and the system is now pressurised to 1.5bar, to my surprise now all the HR92's noise has reduced so much they are barely audible.
So, the radiators used to be under no discernible water pressure maybe 0.5bar from the header/expansion tank, this has now been removed and the new system is pressurised from the mains water pressure to 1.75bar.
My theory is the radiators acted as a sound amplifier and noise from the HR92's was conducted through the radiator body to the walls which then moved and amplified the sound, but now under pressure the radiators don't move. The towel radiators never gave out any noise from the HR92.
Therefore an unintended consequence of a boiler change has provided a significant reduction in HR actuation noise, but they no-longer wake me in the morning and so I've put the alarm back on and the silence is spooky.
HR92 actuation noise was considered in this household (by XYL) to be a problem, but now the noise has all but gone! What's changed?
The old Ideal Standard boiler was replaced last week with a Bosch System-i type and the system is now pressurised to 1.5bar, to my surprise now all the HR92's noise has reduced so much they are barely audible.
So, the radiators used to be under no discernible water pressure maybe 0.5bar from the header/expansion tank, this has now been removed and the new system is pressurised from the mains water pressure to 1.75bar.
My theory is the radiators acted as a sound amplifier and noise from the HR92's was conducted through the radiator body to the walls which then moved and amplified the sound, but now under pressure the radiators don't move. The towel radiators never gave out any noise from the HR92.
Therefore an unintended consequence of a boiler change has provided a significant reduction in HR actuation noise, but they no-longer wake me in the morning and so I've put the alarm back on and the silence is spooky.
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