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Last seen: Sep 5, 2026
These are identical to mobile aircon units (or US style window aircons) you get a compressor and two refrigerant/air heat exchangers in one box. Dra...
Well deserved! 👌 55°C to the rads is really high, shouldn't be that high if they are oversized. Assuming the heat loss is correct, this shou...
OK Power (Watts) = Flow (in l/s) * Heat capacity of water (4180 J/°C/L) * DeltaT (in °C) Flow (in l/s) = Power (Watts) /( DeltaT (in °C) * Heat ca...
Heat capacity of water is 4180 J/(°C.liter), therefore 1kW = 0.24 °C.liter/s Assuming inlet water temperature 20°C outlet 65°C deltaT 45°C, 1kW cool...
Above dew point cooling is mostly useless. For actual air conditioning you need both cooling and dehumidification which can only be achieved with belo...
If it is RS485 (is it?)... It uses balanced/differential twisted pair link. The idea is to send the signal on one wire, and the inverted signal on t...
If it is designed as a RS485 point to point link, then the designers should have included termination resistors on the board at both ends. No idea if ...
+1 for everything Concealed FCUs are expensive to install due to all the drywall work. Also an issue for maintenance. That said, your quote is ind...
I don't remember the manufacturer name, but I saw similar products. It looks like a fan coil, you can mount it in a ceiling. There's an air to water h...
UFH is ideal to get max efficiency with a heat pump, but you need a properly designed UFH. - Correct pipe spacing (calculated from heat loss) to del...
Sun getting through the windows: if you don't have solar protection on the windows (blinds, louvred shutters, etc) then the sun can pump close to 1kW/...
+1 that works well If most of the thermal mass is in the slab (the rest being drywall with interior insulation), and you can control the slab temper...
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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 , 3 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 , 3 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 , 24 hours 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 , 24 hours 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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