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JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 21, 2025
Topics: 17 / Replies: 2697
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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...

6 months ago
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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...

6 months ago
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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...

6 months ago
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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...

6 months ago
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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...

6 months ago
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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

6 months ago
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Agree with the internet connection comment, although I think (but may be wrong) it relies on this only for the more advanced features like tariff opti...

6 months ago
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Agreed, but it needs to be specific to heat pumps and learning of course. Homely goes half way to this (for the heat pumps it supports) but doesn't a...

6 months ago
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RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

Sounds like the HP side pumps are controlled by the HP. By zone valves you mean the two valves which either switch to CH or DHW?

6 months ago
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RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Thats definitely true. There is a good reason however, its very difficult to do meaningful experiments and/or draw sound conclusions from the experim...

6 months ago
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RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

Glad its warmer and more particularly more consistent. Be careful about concluding its costing more though, the last few days were quite a lot colder...

6 months ago
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