SteamyTea

Called a new unit.

Call it the Westinghouse.

Not just the cold that is the problem. Rain can ruin an evening under the stars. So you need a roof. And no one likes a chilly wind, so walls (and ventilation if the wind is con carne). So going to be similar to a house. All it really needs is some sturdy glazing in the roof to look though. If only there was some walk on glazing available. Or just get a NASA feed:

Yes, there is only so much effficiency that can be got from electro-mechanical equipement. My two biggest savings have been from reducing heated water temperature and getting rid of parasitic loads, I still get miffed if I leave a 3W light on. I have never done the sums, but DHW energy usage, in winter, could be improved, I think, by pre-heating, even by just a few degrees, the incoming water. Then boost via an instantanious heater, powered from a PV supplied battery bank. Really down to where the largest standing losses are, thermal storage or battery efficiency. The easy way to to use a lot less, easy for me as I live alone and take an interest, harder for a family. Who can put a price on an arguement over the length of a shower. Well we all can, about 5p/minute for a 10 kW shower.

Was in short trousers then. I still am.

The main thnking is that water vapour can travel from the inside of the building to the outside, and weather, i.e. wind and rain, cannot travel from the outside to the inside. That limits your choice of materials and any ventillation between screen and the real wall. Ah, is this place in Italy. It may be the other way around, it depends on the local climate.

If anyone is doing a roof integrated system in Cornwall, I am interested in look how it is done. Tempted to copy the design in GRP.

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.