SteamyTea

The MI may show the power of the crankcase heater, but if you don't know the conditions it is activated, it is of little use knowing. Also, if you have a small usage i.e. 3 kWh of DHW a day, delivered, burning 1 kWh a day to warm the crankcase is going to half your CoP. A proper meter like this is only a few quid and easy to wire in, even as a retrofit.

Two things. Is that a total of 7 kWh a day, or just the 17 of day rate. You can work the long term average out from the meter, it will show t, for total, 1 for day usage and 2 for night usage. Second thing is it is kWh, not kw/h, that is dividing power, which is energy per unit time, by time and will give misleading numbers. The unit of energy is actually actually the joule (J, named after the man Joule). Power is the watt (W, named after the man Watt). Power, multiplied by time, is energy. There are 3,600,000 J in a kWh. k is 1000 W is J/s, where s is time in seconds h is hour (3,600 seconds). Multiply them all together and you get: 1000 x 1 (W) x 3,600 (hour) 1 kW x 1 h 1 kWh

I always do mine at night, my washer has a delay timer on it. I lune dry. Never use the tumble dryer. Not a huge saving, maybe 30p a wash. Don't think a lizard is going to take much, unless it is over lit (assuming IR heater here). Lizards were like vermin where I grew up. Working from home need not increase usage much. I am at home during the day, I work the late shift. Laptop is permanent on, kettle on a fair bit, usually cook lunch. Use about 1.3 kWh/day. I lit the the E7 window to between 3 and 4 hours a night. No need to charge the DHW and storage heaters up before they are needed (storage heaters close a flap when charging, then release it when not charging, so some savings to be made there). My ratio of day to night is approximately 1:4. My biggest saving is having almost nothing drawing power when it is not needed. Easier to do than many think.

Would need to know of there may be an 'over temperature' problem. This could come about if the refrigerant gas gets too hot, or too high a pressure because there is not enough air though the heat exchanger for the fan speed. I think it is heading for problems.

Could have got these. https://i-button.co.uk/ But they seem to be expensive now.

Only if there is little resistance from any ducting/vents. What you need to do is make sure that many tonnes of air can pass the the ASHP every day. Any restrictions will lower the CoP. ASHP units are large because of the size of the fan and heat exchanger (which is just the same as a car radiator) and fan. Increasing the fan speed (mass air flow though the heat exchanger) would work , but would make the unit noisy as it forces even more tonnes of air though the heat exchanger. If you only have one place (the doorway) to introduce and expel air, the efficiency is going to be reduced. This efficiency reduction is two fold, one there is less air passing though, and the other is that half the air is cooled air, and half is warmed air. This reduces the overall temperature difference of the ambient air. Any ducting, vents, twists and turns (posh name for vortices) is going to reduce efficiency.

@Adsibob Have you put a thermometer (probably and IR one) on the cylinder when it is fully charged. Then you will have an idea how much difference the jacket will make, compared to adding extra to the MVHR. As you have the jacket, you may as well use is anyway and then worry about the thermostat. When I say worry, I mean forget about it.

Yes it can be done. Would involve a battery, charger and an inverter, and something to stop the battery power going back out the building. None of it is going to be cheap. Do you know how much electricity you use during the two time periods (can read that off the meter). You may find that just a bit of careful management can shift some of the load to the cheaper period. Wish mine was, hardly half the price down here. Who are you with, Octopus? You have to be careful that they don't pull a very good tariff off the market after you have invested.

What you have, in effect designed, is a fridge, with the door open. This is how heat engines work. They take a lot of low temperature mass and condense it into little high temperature mass.

Is it a probate sale? Lead poisoning. Ask for £15k off the price, on top of the current 12% asking price. Dow here the water board (currently without water for around 4 hours) will change a lead pipe for free. Thought I do think it depends on how easy/far from their meter/stopcock.

As nice as it is to have everything digital these days, a normal cylinder thermostat is digital, it is on or off. I am not sure if covering it with insulation will be a problem, may have to adjust it a degree or two. Not the same as covering a cable to a 3 kW heating element, tat can cause problems with overheating and potentially an electrical fire. Well the tits are still in the football.

Yes, but not sure it will help much as it is my house, not yours. Do you have trouble sleeping usually, have you thought of a cheap sleep monitor, it may show that you don't actually have a problem. Follow the red line. Scale is on the right.

That is the problem with a relatively small, one off project though. Not as if the customer can test out ten different people to design the extension or family home. Then get them to build full scale replicas to test out the different design and construction methods. And when one is finally chosen, them them they are only going to get the price of the cheapest quote, while not paying the other nine. It is a one off deal, in both sides. So probably best to save some cash by learning to do things yourself.

Not about heat pumps, where he perpetuates all the old tripe about them.

So have they made a plasterboard tent inside our house?

My lightbulbs are 3W, when on. I usually only have one at a time on.

That is a McDonald isn't it?

Years since I looked into this, but what do ships use, they often have electrical stuff on the exposed decks.

They may help flow by reducing the static electricity charge. That would help in the 'packing'. Interesting idea.

Yes. I have two marketeers sitting behind me. (expletive deleted)ing hell do they talk complete bollocks. They are only good for colouring in charts.

I was just getting a coffee and was discussing the new coffee machine with the staff. It cost £35,000 WTF. Not as if they are sophisticated, Italians make them.

I know that graphite is anisotropic (better one way than the other) but the thermal conductivity, at best, is ~ 6 W/m.K. Solid, non porous, polystyrene is around 0.15W/m.K. Expanded polystyrene is much better. Now I know that the graphite coating is a few microns thick, so in reality, neither here nor there. So what is going on? Does it reduce moisture retention?

@Adsibob When I was lecturing, the university decided to check all the lecturers' certificates. Was interesting who left before the deadline. One law lecturer, who was also working as a JP had no relevant qualifications at all. They took her to court I believe. Another, who claimed to have a Doctorate, and in his words, 'I don't need a PGCE' happened to have the same name as someone that had genuinely done their doctorate though the university. He left before the deadline. All his students knew he was a fraud. It is a shame that there is not a central database where qualifications cannot be easily verified, same with professional insurance. May stop the term 'engineer' being miss used.

Check your charitable status, easy to get caught out.