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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 26, 2025
Profile Activity
Topics: 17 / Replies: 2704
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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)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

15% or more typically The problem is not loss of energy (which as you say is small) its reduction in flow temperature to the emitters (due to the mi...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat loss calculators and spread sheets

Pretty much that, basically (1) make sure that the fabric model represents the actual fabric and (2) adjust the ACH to fit measured loss. Here is th...

6 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Fujitsu Waterstage WOYG160LJL Air Source Heat Pump

As long as they follow the weather compensation I wouldn't worry for now, You probably won't want room influence anyway. If they aren't following th...

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

3 times per hour is reasonable. Are you sure it isn't doing defrost rather than cycling because of overcapacity?

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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