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Last seen: Aug 24, 2026
I have just received a quote for a variable speed secondary pump to replace the existing variable speed pump which had no PWM control supplied. Once f...
Really interested in this topic and I am having to change secondary pump to get variable speed. However, I can't see why we should be talking about re...
Thanks Kev M. We are having a warm winter in the Algarve, so I can't do much meaningful tweaking of the Ecodan Compensation curve. I have a buffer t...
Going back to my original question, if I used the figures from the FTC5 or MelCloud, how inaccurate would I be?
Thanks bontwoody. Because of Brexit, I guess that would cost me the best part of €1000 with shipping and duty and then there wood be the cost of fit...
PS If it is of interest, this is the Cordivari buffer tank - it appears to be the "100" model with capacity of 95l. I am not clear what is meant ...
I am very grateful to JamesPa for his very interesting explanation and for the subsequent comments by both James and Derek. I don't want to tackle t...
Thank You to both Derek M and JamesPA. To clear up a couple of points made. 1-The primary pump is already set to max speed (5), so I have to look...
Thanks Derek. We are having a rather mild spell (14C ambient) so I am not sure how meaningful this will be, but temperatures measured earlier today ...
Thanks for your response. I have done nothing on this recently, firstly due to Christmas visitors and secondly because I have not been able to find a ...
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Degrees of Separation
Latest Posts
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RE: Who's your electricity provider and what's your tariff?
Yes, looks like very slight increases in the unit rate ...
By Old_Scientist , 1 hour 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 , 2 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 , 3 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 , 4 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 , 5 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 , 21 hours ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 21 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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