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Illustrious Member
Joined: Jan 20, 2022
Last seen: Dec 3, 2025
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Topics: 16 / Replies: 2750
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RE: Water pump operation choices on my Harnitek heat pump

So you have this model with an integrated 250-litre DHW cylinder. The Harnitek data sheet suggests that there are (at least) two pumps ...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: 4 port buffer tank connections

Wow! 😮 I think this needs raising with Citizens' Advice.They hold the remit for operating the Consumer Rights Act (2015). I suspect they ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: water pump usage

O-er @ivanhoew You are going to get a mixture of replies to that.Let me start by suggesting how your heat-pump should've been commissioned.... ...

10 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: 4 port buffer tank connections

... except the price. An installer can charge more for it having four ports. 😜

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

I love the idea of HP manufacturers eventually getting to grips with HP 🤣 Would it be asking too much for MCS to do the same? Let's r...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan 6kW - is it "cycling", or normal operation?

Hmmm. Let me extrapolate further from your observation. If your house had a concrete pad in that hallway, with UFH embedded in it, then the sympto...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

Thanks @heacol Let me check I've understood those diagrams... Is the ASHP on the left and the radiator(s) on the right like this? I tak...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

I had assumed this subject could be described with static diagrams,which I could create if members here posted a doodle - literally on the back of an ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Just one room not reaching desired temperature

Why? That limits the amount of energy which can be delivered.So large emitters are more likely to struggle. I appreciate why you have used ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 4 port buffer tank connections

Erm...is it? 🤔 I'm finding this discussion very difficult to follow without diagrams. Even tho' I can broadly understand the text when re...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan 6kW - is it "cycling", or normal operation?

Thanks for the page @gary I'm re-posting it with higher resolution and colour correction to help with legibility 🙂 If you want to ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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