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Last seen: Aug 16, 2026
@sandman1600 Thinking about it, my head was in radiator mode. Using under floor heating you can probably knock 5C off both of my suggested flow temper...
@sandman1600 That’s correct. The weather compensation takes over control of the flow temperature according to that little graph that is shown. It’s...
@sandman1600 so what that is showing is that at -3C outside your flow temperature is 55C and at 25C outside your flow temperature is 25C. Between t...
@editor It really just is a case of greed and easy money I fear, Mars
@johnr The really annoying thing about the high service costs is that servicing a heat pump is a lot less hassle than a gas boiler. All that is requir...
Ive done some rough calculations on those figures after trying to add in the wood and Ive come up with a demand of about 19.5kW at -3C to achieve 21C ...
@sandman1600 Yes, you have the idea of what you need to achieve. Ive no doubt you will see much reduced energy usage very soon. 🙂
@dowallydrifter if you had oil usage figures and didn’t use the wood burners much you could use that as well to get a sanity check.
@dowallydrifter I think I would be tempted to do my own heat loss assessment. Using heatpunk/p> or you could try this simple one/p> There is a s...
@sandman1600 Hi. Without knowing more about your system for a quick and dirty fix I would lower your flow temperature to 35C and leave the heating ...
@jamespa @bami Just to clarify, I have already done what James has suggested. My water law settings are as low as I can use.
@broadsman I run mine on water law but with regards thermostat as a limiter on my warmest room so the controller does display HEAT.
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Degrees of Separation
Latest Posts
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RE: New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
It can be done but really, really, don't, you will regr...
By JamesPa , 2 minutes ago
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RE: How Accurate Is My DIY Heat Loss Calculation?
I think this calculation goes the other way. 3.54kW ga...
By JamesPa , 15 minutes ago
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RE: Cooling with air to water heat pumps
A quick update. I finally found a 'solar' roller bli...
By springswood , 2 hours 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 , 16 hours ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 16 hours ago
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RE: Questions about A2A for heating as well as cooling
@donciccio I would suggest that you take a "fabric-fi...
By Rob of York , 17 hours 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 , 1 day 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 , 2 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 , 3 days ago
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RE: Who's your electricity provider and what's your tariff?
@chandykris Swings and Roundabouts, you win some…. ...
By Toodles , 3 days ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 3 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 3 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 , 4 days ago
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