CalvinHobbes Posted January 23 Share Posted January 23 (edited) What do you think of this? Edited January 23 by CalvinHobbes Heads deeved Link to comment Share on other sites More sharing options...
sharpener Posted January 23 Share Posted January 23 Difficult to see even if all their heating is by the auxiliary electric heater (if any) not the heatpump itself how they could have used 4.3 MWh in six weeks. Has the meter been miswired so it is registering the demand for the whole retirement home complex??? 1 Link to comment Share on other sites More sharing options...
ReedRichards Posted January 23 Share Posted January 23 I think it's a "retirement home", not a retirement home. It's a one and a half storey dwelling, detached I presume. That bill seems high even for a heat pump running with a COP of 1. At the very least, read the meter a few times a day to find out what is eating all that electricity. Link to comment Share on other sites More sharing options...
sharpener Posted January 23 Share Posted January 23 Their consumption is about 4kW 24/7. That's more than predicted for my leaky old barn conversion. With a new build I would expect maybe 20 - 40 W/sq m heat loss so 4 - 8 kW for a 193 sq m property, say 6kW or better with MVHR. So with a CoP of 3 in this weather the consumption should be more like 2 kW continuous even allowing a bit for HW for two people. My money is on the auxiliary heating being stuck on for some reason. Link to comment Share on other sites More sharing options...
ProDave Posted January 23 Share Posted January 23 There is not enough detail. If they were on here, I would be asking: Is that high bill actual or estimated? What tariff are you on and what is the unit rate? Take daily meter readings at the same time of day and post them for us to analyse. Real meter readings not from an app or IHD. Post the EPC details of the property so we can see what the claimed performance is, if new build you might even have the full SAP details. Without any of that we can only speculate 1 Link to comment Share on other sites More sharing options...
TonyT Posted January 23 Share Posted January 23 Just cause they have all the kit, doesn’t. Mean it’s been installed properly , commissioned properly or the end user is using it properly, that’s before we look at the build quality. 1 Link to comment Share on other sites More sharing options...
ProDave Posted January 23 Share Posted January 23 We also don't know their other usage. Heating is less than a 1/4 of my energy use. 1 Link to comment Share on other sites More sharing options...
Alan Ambrose Posted January 23 Share Posted January 23 They could look at their smart meter graphs and get an idea what's using all the power. Link to comment Share on other sites More sharing options...
dpmiller Posted January 25 Share Posted January 25 On 23/01/2024 at 15:26, Alan Ambrose said: They could look at their smart meter graphs and get an idea what's using all the power. no they couldn't, no smart meters in NI Link to comment Share on other sites More sharing options...
Alan Ambrose Posted January 25 Share Posted January 25 Ah Link to comment Share on other sites More sharing options...
HughF Posted January 27 Share Posted January 27 3kW immersion running 24/7 for 40 days (it’s nearly 40 days from December 7th - 20th Jan) would give nearly that usage. Backup heater in their LLH or buffer is running 24/7. Link to comment Share on other sites More sharing options...
sharpener Posted January 27 Share Posted January 27 On 23/01/2024 at 11:27, sharpener said: Their consumption is about 4kW 24/7. That's more than predicted for my leaky old barn conversion. My money is on the auxiliary heating being stuck on for some reason. 1 hour ago, HughF said: 3kW immersion running 24/7 for 40 days (it’s nearly 40 days from December 7th - 20th Jan) would give nearly that usage. Backup heater in their LLH or buffer is running 24/7. Terrible echo on this board don't you think? Link to comment Share on other sites More sharing options...
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