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Last seen: Nov 3, 2025
@derek-m If you want to go the DIY route, I would suggest/p> I am personally considering this, but now I have found my app does power and heat deliv...
@derek-m my system always had weather compensation. For me the big issue was actually radiator balance as before that point I needed the high heat to ...
@derek-m as a note you can use the function "FORECAST" in excel to recreate this chart. All you need are the two set points and a desired value e.g. 5...
@derek-m It doesnt matter what I set the thermostat to. Originally I had it on 22, but moved it to 21.5 to prevent a boiling house if the experiment w...
@kev-m actually I used LESS power. You can see from below the details of the days. And of course as soon as I said it, I was wrong. My heating go...
@derek-m if its like my system its topping up the water temperature and then just running the pump to push the warm water around. If you go into the o...
Some initial feedback on how my weather compensation is going. The main point would be that when it was 13 degrees ambient for 2 days last week my COP...
@derek-m house continues to hold at 21°. Thermostat is set at 21.5 and it just can't make it - so I'd say that's a win for weather compensation. I jus...
@derek-m I think I'm getting somewhere. I've had my thermostat set on 22 all morning, and the house is holding at 21 - it doesn't seem to be gaining a...
@derek-m I am quite lucky that I can view every day via the app, however its not great. I can see a previous day only as a summary and not actual. b...
@derek-m I think I need to work on the curves and flow, as it was 19 degrees downstairs this morning, and it should be 21. Its warmed up now, but I ne...
I've also just discovered my minimum flow temperature is 25°. I can't go lower than that
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Latest Posts
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
Thanks for the update. Vaillant is a good choice, their...
By Batpred , 1 hour 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 , 8 hours 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 , 1 day ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
D'oh - of course. I shouldn't post before my brain is f...
By Old_Scientist , 1 day 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 , 2 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 , 2 days ago
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RE: Cooling with air to water heat pumps
Passive cooling should always be the first call. Keep ...
By JamesPa , 2 days ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 2 days ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 2 days ago
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
By Mars , 3 days ago
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 4 days ago
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 4 days ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 4 days ago
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 5 days ago



