Last seen: Sep 12, 2025
Thank you all very much for your comments which I will reply to shortly. In the mean time, here is some data from the recent power cut, which by coinc...
You're right, I should have labelled the axis, I hoped the title was enough, and it allowed a slightly larger plot area. Yes, it is kWh/week. I w...
I like to imagine I get the distinction most of the time, but the use of power (kW) for heat loss and energy (kWh) for energy use does leave me easily...
No, as I said in the post, I applied a curve (distribution) derived from recent weekly readings to the annual oil use. Note that the first chart is en...
Interesting, I stupidly didn't do that calculation. My calculated heat loss, done for the heat pump installation, is around 12.3kW, but that is also a...
The Met Office WOW website I mentioned has that. You need to register to download the data, but it is free to do so (csv format). I do it once a month...
I certainly welcome any such attempt! I think it may be considered an interesting case, often it is the anomalies that lead to better understanding, s...
The heat energy used (energy in) is measured, and accurately (meter on the oil delivery tanker, external dedicated kWh meter for the heat pump). The h...
Try the Met Office WOW website (<=link). You can search for a weather observation website near you and download the data (you have to register but ...
I don't think so. Consider the facts I presented (measured use), and the assumptions I made (efficiencies), and while the latter are only estimates, t...
I raised this paradox (the 'disappearing COP') in another thread a while back and didn't really get a satisfactory answer. The best I got was somethin...
I still think the biggest obstacle is price, both installation and running costs. Even with the BUS grant, a heat pump is going to cost a lot more tha...
Latest Posts
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RE: Humming sound on new install.
Ok took some pics. It’s seems level one end front to ba...
By AdamK , 17 minutes 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 hours ago
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I didn't want to say that, bus since you have said it n...
By JamesPa , 2 hours ago
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RE: Is a Valliant Inline 6kW heater a BUS buster?
I think so but I don't know for certain. A cascade as ...
By JamesPa , 4 hours ago
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RE: Midea ASHP – how to set weather compensation
Mostly, I think, but with some caveats. I set the TI...
By cathodeRay , 5 hours ago
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RE: Is Your Broadband Router the Weak Link in Your High-Tech Home?
I have been working on network resilience for a while. ...
By Scalextrix , 7 hours ago
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RE: Buffers, hot water and cooling
@dgclimatecontrol thanks, that's helpful.
By JamesPa , 23 hours 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 , 1 day 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 , 1 day ago
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RE: Who’s Caved and Switched the Heating On Already?
@allyfish Dogs have owners - Cats keep staff. You are o...
By Toodles , 1 day 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 , 1 day 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 , 1 day ago
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RE: Havenwise App Help & Forum Support – Get the Most from Your Heat Pump
I am pleased to say at 4pm today we have added another ...
By ASHP-BOBBA , 2 days ago
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RE: Renewables & Heat Pumps in the News
To unpack this a little.... 1) how many of us in this...
By Lucia , 2 days ago
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RE: Vaillant aroTherm Plus 10kW thoughts?
@realevil the fans and fan speed / coil size (height, w...
By ASHP-BOBBA , 3 days ago
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RE: Mitsubishi Ecodan 11kw Defrosting Issue.
@morgan this can just be done by your sepecilist when t...
By ASHP-BOBBA , 3 days ago
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RE: Anyone still weathering it out with Agile?
@toodles I guess it all comes down to import averages. ...
By Tim441 , 3 days ago
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RE: 300 Liter Tank - Do I have to heat it all?
The size of DHW tank affects the anti-legionella cycle....
By Transparent , 3 days ago
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RE: Heat Pump SCOPs – The Truth Might Not Be What You Think
@scalextrix Name plate capacity
By HCas , 3 days ago
