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Last seen: Sep 5, 2026
If it's a data cable, current will be minuscule, voltage drop irrelevant. If they run significant current through it then they should call it "power...
In France we had such scheme with wind turbines. Investors own a share of the wind turbine, and cash in a share of the profits, but an overlooked de...
Office (blue) and Living Room (orange) have UFH, running 18°C water from the heat pump about 12 hours a day (on free PV). Living room also has a mob...
Watts Microflex Duo, intended for burial, about 45€/m, with 2x 26/32mm Barrier PEX. It is quite stiff and difficult to manoeuver but it does the job...
The drawing is fine and perfectly understandable except "NRV" which has the symbol of a pump but I guess "NRV" means "Non return valve" or "Check valv...
If flow is too low, the heat pump will probably throw a fault. High flow is not a problem for the heat pump, it'll work fine. Higher flow gives lowe...
Oh my, bureaucracy at its finest! Does that imply that the reason why both my PV inverters and heat pump have a 8 pin connector with extremely basic...
In fact inverters with a bit of local energy storage could also do that, if programmed accordingly. Sadly it doesn't seem the current hardware is prog...
I think we're still going to try hydrogen for residential heating on a small scale, then walk it back after a few buildings get launched into low eart...
Hmm I should have explained it better... Problem with these devices: they have only one pipe. Thus they suck in already conditioned air out of the r...
You guys have it easy It's engineering: calories in, calories out. What I had: stone house, built 1732, 50cm thick walls, estimated thermal mass...
I'd say it's up to you to decide between these two behaviors: * Manual balancing valves * For example Caleffi 132 which has a manual valve and flo...
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Degrees of Separation
Latest Posts
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RE: Where heat loss surveys seem to go against practical reality
@cathoderay I started to record oil usage per month on ...
By ian33a , 46 minutes ago
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RE: Next steps on my ASHP journey: Radiators and Pipework
@bobflux The hydraulic simulator is very interesting...
By Rob of York , 4 hours ago
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RE: 7kW EV Charger Options Advice
Thanks. Yes, we have patchy 4G. The only option we had ...
By Rusty , 9 hours ago
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RE: Being screwed over by Volkswagen Audi Group
Thanks, @batpred. That integration is the one I have in...
By Majordennisbloodnok , 1 day ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
@batpred I suspect it will be more this year. I had 9 ...
By AndrewJ , 1 day ago
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RE: Surface mount or bury primaries for heat pump installation?
@jamespa It's rusting 🙂
By tomasmcguinness , 1 day ago
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RE: Glass lined Cylinder for private water supply
Thank you, once again, for your replies. Yes...
By ian33a , 1 day ago
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It’s been out a few days and Amazon has already attache...
By Mars , 1 day ago
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RE: Missing flow temperature in Heat Geek proposal
Yes, and this is another point I agree. We did find a f...
By Batpred , 1 day ago
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
A very good point. In effect, the DHW pipework is an em...
By cathodeRay , 2 days ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@tim441 Here are those same three month periods for 202...
By Toodles , 3 days ago
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RE: Adding additional Solar Panels to a DC coupled battery system
@transparent thank you for your reply above. As alway...
By Old_Scientist , 4 days ago
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RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 6 days ago
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