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Last seen: Aug 16, 2026
@alfapat Sorry, missed the (large) tank comment 🙂 OK if the original install was for 25 kW then the 16 kW alone probably isnt oversized, but it su...
@alfapat Thats the document! unfortunately I cant read it from the images, they are probably compressed for the forum. I will pm you my email address,...
@alfapat So you should have been given the heat loss calculation when you had the heat pump installed. It has to be done by the installer. I think t...
@johnnyb So here is a day where I was cycling although not frequently The interesting bits are just as the heat pumps starts up again. Flow temper...
@johnnyb If its PWM controlled you should have two cables running to it, one for power and the other for the optional PWM control. Not all pumps can d...
@mike-h @johnnyb @technogeek So my pump is PWM controlled from the control box, but I dont know if the thermostat controller influences that at all....
@alfapat So thats a big bill! I cant help thinking that given the insulation you describe, you should be doing a lot better. Can you find your suppose...
@alfapat So the absolute flow temperature isnt important. Just how it makes the room feel. If its been 15 hours and you still havent made the desired ...
Here are my settings, I think the 201 settings in the video might be backwards. You can always check by feeling if your radiators are hotter in colder...
That is an older controller you have so the procedure might be different unfortunately
@alfapat this shows how/p> I have a feeling though that he puts one of the figures in the wrong way around in the video though
Hi Patrick In a word yes. If you want an efficient heat pump system then you need to set the flow temperature as low as possible while still providi...
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Degrees of Separation
Latest Posts
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RE: Who's your electricity provider and what's your tariff?
@old_scientist Have you ran the numbers as to which ...
By Papahuhu , 2 hours 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 , 3 hours 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 , 5 hours 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 , 5 hours ago
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RE: Cooling with air to water heat pumps
Passive cooling should always be the first call. Keep ...
By JamesPa , 6 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 , 23 hours ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 23 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 , 2 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 , 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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@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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