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Last seen: Oct 16, 2025
We’ve been relying on people doing heat loss evaluations to size the heat pump and two different ones came back with similar suggestions so we were ho...
@jamespa Thanks very much. I appreciate you’re probably sick of newbies coming along and asking questions but I’m genuinely trying to educate myself...
@bontwoody Thanks. I really do appreciate the advice from everyone. It’s all helping get my head around the new normal of a heat pump.
The Polypipe UFH system is set up with two manifolds (one on each level of the house) and a thermostat in every room.I’ve attached a photo of the mani...
@bontwoody That’s great. Thank you.And is it normal that when the weather compensation is activated, I can’t make any manual adjustments to the flow t...
Thank you. I’d literally just found that video as I couldn’t figure out what was meant by “Control Logic”. I tried reducing the flow temperature to 35...
I get the impression that they’re just trying to replicate a conventional boiler for people. Which is utterly nuts but I’m guessing it makes life easi...
We’re in a 130 m2 split level bungalow so that’s really encouraging. We’re not exactly hermetically sealed but we’re pretty airtight and insulated so ...
Thanks for the extensive info here. Can I just make sure I understand this… so the idea is to ramp up the thermostats so that there’s a constant call...
@tim441 Thanks for that. The Weather Compensation settings are definitely something I need to get my head round. The installers told us to ignore that...
@bontwoody thanks very much for that. Weather compensation is something we really need too look at. The installers told us not to bother with it. ...
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Degrees of Separation
Latest Posts
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RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
Thanks for sharing that. Your objective seems very sen...
By JamesPa , 6 hours ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@toodles Very nice. Ours was the opposite, about 10%...
By Papahuhu , 7 hours ago
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RE: Adding additional Solar Panels to a DC coupled battery system
A couple more points about placing solar panels at low ...
By Transparent , 7 hours ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
@kilgorexv definitely a larger inverter will help and m...
By AndrewJ , 1 day ago
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RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 1 day ago
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RE: Surface mount or bury primaries for heat pump installation?
The installation is almost done! I've written up two ...
By tomasmcguinness , 2 days ago
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RE: Glass lined Cylinder for private water supply
This has turned into a fascinating little rabbit hole. ...
By Mars , 2 days ago
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RE: Switch suitable to change between two inverter CT's
Last winter my battery ,32KWh, could run the house com...
By Jancold , 2 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
Agree with Major. And even if I was very happy with ...
By Batpred , 2 days ago
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RE: Is the "divide by 2900" rule still valid?
There is another estimator that you could use, a formul...
By Rob of York , 2 days ago
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RE: To re-pipe or not to re-pipe? Moving from oil boiler to air source heat pump.
@penval, really useful update. After all the discussion...
By Mars , 5 days ago
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RE: Who's your electricity provider and what's your tariff?
@papahuhu I prefer to look at it simplistically. We d...
By Old_Scientist , 5 days ago
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RE: Questions about A2A for heating as well as cooling
@rob-of-york I would concur with the underfloor insulat...
By Toodles , 6 days ago
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RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
Nothing attached! I have rads but UFH makes the case ...
By JamesPa , 6 days ago
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