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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: Heat pump quotes: Advice needed

As this topic is being read by an OP who is still evaluating quotes for an ASHP,I'd like to add a comment about Vaillant. I've noticed that they hav...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Double heat pump for DHW?

Thanks Bob. Could you just clarify what you mean by setting "the ASHP power at 12kW"? Yes, I appreciate that 12kW may well be the largest you'd su...

10 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Heat pump quotes: Advice needed

One other point about microbore, or any system where the pipework isn't adequately sized for the required transfer of heat... To obtain the desired ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump quotes: Advice needed

It might be 'standard' in that it complies with the way MCS-approved installers are required to undertake calculations... 😥 ... but the lower ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Legionella cycle - immersion heater problem

OK @clockworks - I agree with your analysis. So what you're seeing here is due to the relatively slow rate at which heat is rising in the tank. ...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Legionella cycle - immersion heater problem

I've just superimposed those and adjusted the x-axis to make the time-frames coincide... I think Mitsubishi need to justify the need to send the i...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Double heat pump for DHW?

Thanks Bob. For such an elderly plate heat exchanger, yours is in a cupboard which is remarkably free of cobwebs! So that others can see what we'r...

10 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Double heat pump for DHW?

Can we have a photo of that plate heat exchanger please @bobtskutter ? Plus your comments on why this is preferable to having a coil inside the cyli...

10 months ago
Forum
Domestic Hot Water & Cylinders
Reply
RE: Ecodan Legionella cycle - immersion heater problem

You are making all the 'right' points @clockworks ... which gives me a dilemma because I'm meant to be installing an internal-insulation wall this aft...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Legionella cycle - immersion heater problem

There are randomised delays available... but they're not properly implemented,and sometimes not at all. All Smart Meters have a randomised offset to...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan Legionella cycle - immersion heater problem

I'll raise that with the DESNZ committee who are creating the 'Standard' for Demand Side Response de-coupling of heat-pumps from the grid. There are...

10 months ago
Forum
Air Source Heat Pumps (ASHPs)
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