Noisy central heating pump

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Joined
22 Nov 2004
Posts
367
Location
London
Hi there

I just had a new central heating system fitted. An Air Source Heat Pump as it happens.

It replaces our boiler that was under the stairs. Now there's just a hot water cylinder and a load of buffer tanks etc.

The problem is that the Wilo pump we have in there is noisy - it makes this droning sound that is audible in the hallway and even on the landing one flight up.

The irony is that we spent a fair bit of money getting a noise assessment done on the pump to prove it wasn't a noise nuisance not knowing we'd end up with a noisy pump inside the house.

The installer says that's just how loud pumps are. We've tried wrapping it with insulation and also lagging every pipe out of the boiler room but to no avail.

Is the pump defective or should we suck it up?

Thanks!
 
The pure decibels aren't the issue - it's the resonating hum that seems to be.

The engineer has offered to replace the Wilo with a Grundfos. Do you think it'll make much of a difference?
 
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