Last seen: Sep 14, 2025
@iantelescope Good Not sure why but if you wish to go ahead Why have you changed the water law coordinates. The ones Derek...
Most radiator manufacturers give a curve for output in the form P=kdeltaT^n where k is a constant, deltaT is the temp difference between radiator an...
@iantelescope Thanks for the replies. No conclusion can be drawn from the energy graph without also showing oat and it. Suggest to ignore for no...
It looks like B1, B2, Hall, Kitchen are bigger than needed for the design flow temperature so will work at lower FT. Living room*2 are smaller than n...
@iantelescope In summary this all looks good so far. I can offer the following initial observations on the graphs These are showing a sm...
Good, the graphs will take some looking at to see if there any insights. @derek-m may beat me to it. If it looks like room temperature is genuine...
There is some possibility for confusion here. If its the design schedule from the system designer then 'at a design temperature of 50' is likely to...
Unfortunately I think this goes beyond heating engineers, its a facet of practical trades in our country - we value celebrity and financial engineeri...
@editor Precisely so. We need an industry that has the capacity and delivers a quality product at a reasonable price. DiY-ers complement the i...
@johnmo @heacol @derek-m Perhaps it would help to distinguish expertise from experience. Expertise is valuable in most circumstances. Experience i...
@iantelescope Good. Why are you expecting the house to cool significantly? If I understand your system correctly your secondary (radiator) p...
PS. I should have added that the heat pump capacity you need may be up to 25% less if you have a very old (ie inefficient) boiler. In the range 6-9k...
Latest Posts
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RE: Heat Pump Damage on install - useable or dealbreaker?
They have already been dishonest by not telling you abo...
By GrahamF , 2 hours ago
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Testing new controls/monitoring for Midea Clone ASHP
Hi all, I thought it might be of interest to others i...
By benson , 2 hours ago
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RE: Electricity price predictions
@diverted-energy sounds like good tariff for you. Octop...
By JulianC , 3 hours ago
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RE: Who’s Caved and Switched the Heating On Already?
In the last week, the external temperature in south Man...
By GrahamF , 5 hours ago
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Ok. Two schools of thought. The first is to run the ...
By JamesPa , 5 hours ago
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@drei Willing as I am to help, I don't think I'm yet ...
By JamesPa , 6 hours ago
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RE: Is Your Broadband Router the Weak Link in Your High-Tech Home?
I hear you on the locality issue @transparent, and I ag...
By Scalextrix , 8 hours ago
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Selling 5 year old ASHP & Gas Combi Boiler - £590
Selling a 5-year-old Daikin Altherma Hybrid Air Source ...
By Paul G , 9 hours ago
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RE: Midea ASHP – how to set weather compensation
@pash44pump Referring to the problem of rooms with diff...
By Tasos , 10 hours ago
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RE: Help me keep the faith with my air source heat pump installation
Er true, it should have read l/hr!
By JamesPa , 11 hours ago
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@damon thanks. I will do as you suggest. Hopefully I wi...
By bontwoody , 1 day ago
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RE: Is a Valliant Inline 6kW heater a BUS buster?
Much of that is true in principle, but its not likely t...
By JamesPa , 2 days ago
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RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
@dgclimatecontrol I attach the responses from 2 potenti...
By pash44pump , 2 days ago
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RE: Buffers, hot water and cooling
@dgclimatecontrol thanks, that's helpful.
By JamesPa , 3 days ago
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RE: Failing heat pump system - seeking thoughts on a rebuild
I realise im overdue an update on my situation. first...
By Cleardene-ashp , 3 days ago
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RE: Replacing Worcester oil boiler with an ASHP
@toodles thanks. I was told by the engineer that this h...
By JulianC , 3 days ago
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RE: What crazy nonsense are inverter limits and why are they imposed?
A week later, I'm finally picking up this comment... ...
By Transparent , 3 days ago
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RE: COP is not the only measure of efficiency
We keep all our TRVs fully open using the whole house a...
By Old_Scientist , 4 days ago
