SteamyTea

I think I read somethign about this. Seemt o remember that it was 20W, then a bit more when tracking. Is the service good though?

You also have a baseload of between 100W and 200W. Do you have lots of entertainment stuff i.e. TV, Sky box, games consoles permanently on, or on standby?

Are the days that show over 10 kWh, baking days? You have a consistant spikes at 11:30 and 20:30, is that the ASHP coming on to heat water.

I bought some for under twenty quid a few weeks back. But what model of ASHP do you have it may already be in there.

Rather than have two threads on the same topic, shall answer here. The flow temperature is how hot the water is that runs though the pipes. 45°C is quite hot for UFH, expecially if you have 150mm of decent insulation under it. Is the floor covered. You also seem to have a number of seperate zones, though without seeing the manifold, it may be different. When your room temperature gets up to the 19°C, zones will start to close down (or the whole system my close down, hard to tell). What may happen is that if only one small zone is calling for heat, the ASHP starts up, heats it, then closes down, quickly. If it is doing this most of the day, then the system is short cycling, which is ineficient. Why buffer tanks are fitted, the allow the ASHP to run for a decent amount of time and temporarilly store some energy.

No, they are just starting to get going. I swallow them raw.

That is just showing the total usage, and the instantaneous power. Can it show half hour usage as a time series, i.e. for the last week?

That it is the ASHP that is gobbling up all the electricity. You have been asked a few questions i.e. number of zones, flow temperature, running regimes, insulation under and over the UFH. Without knowing the answers to these, it is impossible to help you.

You have rather convinced yourself of that, without actually measuring anything.

I suspect this is part of the problem. @tommy12398 Is there a buffer tank fitted. How many independent zones are there. What is the flow temperature into the UFH. How much insulation us there under the UFH. Do you have thick carpets over the UFH.

It may well come the colder months. https://www.globalpetrolprices.com/United-Kingdom/lpg_prices/

Some have a built in meter that you can access. What make and model is it and others that know it may be able to tell you.

Say you will take it off their hands, then find a refrigeration engineer to find the leak. Leaky heat pumps, like leaky gas boilers need to be isolated until the problem is fixed. Defeats the main point of them otherwise.

Yes, been top of the policies they are promising, the only ones above it are everything else. Rishi has already said 'no onshore turbines' or in other words, no change in policy. At least Boris promised us that all houses will be powered by windpower by 2030, and he was an honest man.

But you get around a CoP of 3. You only get, with gas, about 80% of the energy converted into useful energy to heat your house and water. Hardly worth changing a heating system to save a few quid a year. Be better off changing your car to a much more economical one, probably.

Not excessive amounts. I live alone and use about 3 kWh a day at the moment. Most will be hot water (just an ordinary immersion heater). Winter that goes up to about 20 kWh a day. kW is power, kWh is energy. Energy is power times time. So a normal kettle is around 2.5 kW, use it for 3 minutes to boil some water, 0.125 kWh. Don't boil more that you need.

And no one wants to pay to upgrade it either.

@tommy12398 Go and take an electrical meter reading tonight. Then do the same every night for the rest of the week. Without knowing how much you use, sorting it out is guesswork.

Do you mean m2. 200 foot2 is very small. 18.5 m2.

Are you trying to run the ASHP like a gas boiler i.e. only on when you need it, rather than on al the time. What temperature do you set your DHW at, does it run a disinfectant/legionella cycle? I it an Ecodan that gives problems with the crankcase heater. Do you have detailed electrical energy usage via a logger or smart meter?

You are making a knee jerk reaction to the recent prices rises. Medium term, electricity will drop in price (and you are being subsidies £400 this year). Electricity, if we keep up our current renewable deployment, will reduce the price more. Gas is being phased out, not very quickly, but it is going to go, so the kWh (not kw, kW, or kW/h even). One area that this government may look at is the green taxes on electricity and not on gas, swap them over and at todays prices electricity will be about 22p/kWh and gas about 14p/kWh. Throw in the CoP of an ASHP and that makes a kWh about 8p for an ASHP and once efficiency of gas boiler is taken into account, about 9p/kWh. Probably cheaper to reduce your usage.

@markocosic Interesting. Electrical generation price should be set on CO2 emissions, not resources used. A CCGT has an efficiency of around 0.6. Also, if we did have net metering, why would the delivery companies want to pay more than the half hourly wholesale rate? Or the even cheaper long term wholesale rate, which carries severe financial penalties for non delivery. Should domestic supplies have the same rate of income without the risks, or should they accept a lower rate? Until the last year, the mean half hourly price of electricity was around £50/MWh. Pretty close to what people are getting paid now.

I am a bit bored, so thought I would try and calculate what sort of U-value you would need to be equal to something really shiny so that the power transfers are equal. Shiny has an ε of 0.03, with a roof tile temperature of 70°C and a room at 22°C, 11 W.m-2 would be the power delivery. For the same temperature difference, insulation with a U-Value of 0.2 W.m-2.K-1, would deliver 10 W.m-2. So if you have 0.18m of k 0.035 insulation, you will be better off. (it is actually the same radiative process going on in insulation, but because of the reflective angles, and interference, less power is transmitted though the material)

Few years back I noticed my daily electricity usage had gone up. It was the fridge. Seems it had degassed itself and was trying it's hardest to get down to temperature. My current fridge used around 0.3 kWh a day. I am not sure if that is good or bad.