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JamesPa
JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: Oct 5, 2026
Profile Activity
Topics: 27 / Replies: 5447
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RE: 7kW EV Charger Options Advice

I had only a granny charger for the first two years of EV ownership (Kia niro,). I didn't find the charge time a problem with a bit of planning. I e...

1 month ago
Forum
Renewable-powered transport (EVs & e-bikes)
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S

Thanks for sharing that. Your objective seems very sensible as is working out what to do before you are forced to do it in a hurry! As to the cal...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Adventures in heat loss calculations

Was the tweaking adjustment of assumptions to fit the facts?

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Adventures in heat loss calculations

My only comment is well done. You have come at this several different ways and got, perhaps a bit fortuitously, very similar answers. If only heat p...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless

Nothing attached! I have rads but UFH makes the case for not using thermostatic control (and certainly not third party thermostatic control) even st...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Cooling with air to water heat pumps

Passive cooling should always be the first call. Keep the heat out rather than trying to extract it by using more heat! Southern European countries ...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless

It can be done but really, really, don't, you will regret it and you will suffer exactly the problems your installer is predicting and almost certainl...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How Accurate Is My DIY Heat Loss Calculation?

I think this calculation goes the other way. 3.54kW gas is used of which 85% went to the house (the rest up the flue). So the house needed 3kW. ...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Volumisers in Heat Pump Systems: Does Placement Matter?

Volumisers are normally plumbed so that they are in the heating circuit only, which is done by putting them after the diverter valve. Yours has obvi...

1 month ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Plug and play solar. Thoughts?

My thought is simple. Bring it on and bring on plug in batteries asap as well. I think that the g98 position may mean that you can still have 1 p...

1 month ago
Forum
Solar Photovoltaic (PV)
Reply
RE: Heat loss calculations

That's consistent with your heat loss calculation. You will end up with a 5 or 6kW heat pump. Cosy 6 if you go with octopus, probably the Vaillant ...

1 month ago
Forum
Air Source Heat Pumps (ASHPs)
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