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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 19, 2025
Profile Activity
Topics: 17 / Replies: 2696
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RE: Fujitsu Waterstage WOYG160LJL Air Source Heat Pump

I think thats expected with the way this particular model works, see page 49 of the manual. Adjusting the room temperature 'set point' shifts the WC ...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Totally bewildered with my ECO4 heat pump installation

@jaynieq Thanks for the feedback, its always good to hear what happens as it helps us do better next time. You may find you need to fine-tune the we...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Fujitsu Waterstage WOYG160LJL Air Source Heat Pump

I would agree with your conclusion on the last point. When you say 'target temp', thats set on the fujitsu controller in the plant room? Hopeful...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Tomato Energy

... Our posts crossed. The 'physics' problem for any invention (although per the above Im not sure its needed) is the desire for 20l/min showers...

6 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Tomato Energy

Not really that much wasted. In winter, assuming your DHW tank is within the heated envelope of the house, it offsets the space heating, so no actu...

6 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

6 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

The second one avoids the possibility that all the hot water collects at the top and is bypassed by the returning flow. Not a lot really, but perhap...

6 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Tomato Energy

I think the physics is your enemy here. Water has an enormous heat capacity compared to more or less anything else. So it needs a lot of energy to he...

6 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Solar inverters - where does the energy go when clipping?

It's a good question and one which I have asked myself. We really need a solar panel physicist to answer, I am a lapsed physicist but never really st...

6 months ago
Forum
Solar Photovoltaic (PV)
Reply
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide

The volumiser provides extra system volume which may reduce cycling or may be necessary for defrost if your system doesn't otherwise have sufficient w...

6 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

I believe so, we are looking for difference so as long as you can clamp consistently then it doesn't matter if the figure isn't perfect. I stress th...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

@tim441 if you want to you can work out roughly how much it's costing by measuring the temperature drop across the buffer flow to flow. The cost is r...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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