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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jul 21, 2025
Profile Activity
Topics: 16 / Replies: 2631
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RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

My strong gut feel is that, if you bypass the pump in the secondary, turn the thermostat up to full, bypass the buffer, it will work. Basically the h...

5 months ago
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Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Water tank location – where can I put it?

Thats not directly relevant because you are comparing real time heating with stored hot water. Real time heating is dominated by the raw power you ca...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Flow rate vs emitter 'openness', and CoP?

I guess that depends on where you measure it. If measured at the heat pump then the flow rate for any given heat transfer at any given deltaT (across...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Water tank location – where can I put it?

Typically DHW tanks are cylindrical and ~1.4m high (or more) Is the loft a possibility? If not then with the relatively small space available you ...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

@transparent I dont disagree in principle but ... in the real world where time is money and the customer doesnt want to pay the latter existing ca...

5 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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RE: Ecodan 6kW - is it "cycling", or normal operation?

For what its worth I had exactly the same experience with my Vaillant heat pump and have settled on operating in pure WC mode. One of the challenges...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Underfloor heating: Diagrams with COP 'per water flow'

I read the post you referenced and Im not wuite sure what the question you are trying to answer is. If its this "In summary, if I had the choice...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

I think your argument is based on the relatively unusual case of a very low loss house with a large slab/UFH operating at a low flow temperature. The...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Thats fair. Essentially all the controller needs to do is adjust target flow temperature (or possibly the WC curve so that the heat pump is left to a...

5 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

I think those wires might be sensor connections possibly to the points marked wht 1 2 on the diagram

5 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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