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Saz
Saz
@saz
Member
Reputable Member
Joined: Sep 15, 2021
Last seen: Mar 17, 2025
Profile Activity
Topics: 3 / Replies: 116
AllTopicsReplies
Reply
RE: Circulation pump issues

@derek-m I've turned the whole system off now as that pump starting to make strange noises and I was getting quite freaked out. This does however mean...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Circulation pump issues

Hi Derek, It's a Vaillant Arotherm plus. The ciculation pump is a Wilo. The UFH is off, and so are the rads, so I don't get why it's even running, t...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Vaillant Arotherm Plus issues - circulation, efficiency and performance – heat pump horror story
5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 106
Views: 55581
Reply
RE: My ASHP Installation

@mikefitz Hi, and these systems shouldn't need to even use the immersion at this time of year I think? It's a good idea to do comparisons, that's what...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My ASHP Installation

I had the electrician back out today to look at the immersion, as I had reported it coming on alongside the heat pump during regular heating of the ho...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is my heat pump correctly sized?

Oh no @editor Am I right in thinking you have the Arotherm plus also? I'm using a portable radiator and boiling kettles again at mo until this immersi...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is my heat pump correctly sized?

Hi @KevM It was installed by an accredited installer but I don't understand why they sized this pump at 5kW when my old Dimplex was 12kW. It is a hig...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Is my heat pump correctly sized?
5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 12
Views: 6841
Reply
RE: My ASHP Installation

There are quite large areas of floor that feel cold underfoot so I do suspect a problem. The system has replaced an old Dimplex ASHP and I don't remem...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My ASHP Installation

Thanks @editor and @derek-m I have the uniSTOR 200lt tank and I think the pump is a Wilo Circulation pump? The noise is quite difficult to describe,...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
Vaillant Aerotherm plus

Hi all, I've recently had a 5kW Vaillant Aerotherm plus installed (3 bed new build) which runs DHW and UFH/rads. The hot water side appears to work ...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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