SteamyTea

The flow rate will possibly change (or the temperature change) depending on the temperature difference between the cold, incoming mains, and the temperature you want the shower to deliver. Knowing the power (kW) will tell you what temperature lift you can get for any given flow rate. 4.18 [kJ.kg-1.K-1] x kg.s-1 [flow rate]. (T1 - T0) [temperature increase]

Picked the wrong area of science then. Thermodynamics is the Royalty of Science. Basically you have a cold side and a hot side, just like any heat engine. What goes on in the middle is irrelevant, but in the case of heat pumps it is the expansion (cooling) and compression (heating), that does the work. Where it differs from a combustion engine is that the cold side is below ambient temperature and the hot side is is above ambient temperature, though not as much as a combustion engine. Though the overall temperature differences may well be similar i.e. 70°C to 80°C. It just starts at a lower temperature say -30°C. So when you need to cool, it is really just a bit of plumbing change, pump the cold side around the house, cool the hot side with external ambient air. When heating DHW, it ramps up temperature (compresses harder) and diverts this to the cylinder (lots of debate about cylinders, they are only a bucket of water that starts at a low temperature and gets heated, ready for use), while disconnecting the rest of the system. The thing to remember with a heat pump is that as they approach their maximum output, the CoP (efficiency multiplier) drops towards parity i.e. 1 kWh in, 1 kWh out. This is why they need to be oversized, usually around 30% above the power (the kW, not the kWh) of the DHW requirement heating times i.e. a sensible reheat time, say 2 hours.

Apart from the 'electrical and structural' side, the MCS specifies approved modules. You can have any inverter you like, as long as it is acceptable to the DNOs. Battery systems are basically an add on, so as long as they are properly fitted and are safe, then they are not part of it. As a general note with MCS, there is a lot of paperwork that has nothing to do with the actual fitted systems, this includes quality assurance systems and staff monitoring, or as we used to call it, traceability, dispute resolution etc. This is where part of the MCS cost is, you are paying for things that may never be needed.

All bottom feeders, best avoided. I often watch the seagulls feeding at the end of the sewage pipes at Porthleven and St. Ives, and wonder why they prefer human scat over chips and ice cream. Then I chatted to @pocster.

As you are in all day, and assuming that you need power then, try comparing the very lowest tariff you can find with a standard E7 one. The day rate for E7 can be quite painful, but for a lot of the year you will be reducing that with the PV, and when the PV is at its worst, you may find that the heavy heating load can be satisfied with just night time usage. It is all a juggling game and without high quality data it is impossible to suggest anything more than generalisation.

You can wash it in soap, or wash it in soda Nothing will remove that Billingsgate odour

Nor me, but for different reasons. But I sell tonnes of it thought the year.

Hope for what, that we loose access to our fishing grounds, or access to our largest market place for fish. We are unable to get haddock at the moment.

This is why, I believe, it got added to the system. Stops all that sort of nonsense.

This was something that got added to MCS about a decade ago, to do with wind and snow loading. Installations on old roofs have also been a concern.

is there any advantage to you having a taller house? Will your builder pay for the retrospective planning application? And then if it fails, put it right?

I seem to remember that in France it is the Town Mayor that has all the powers on planning and building. But many years since I lived there. I like Normandy, Calvo was my drink of choice, but could never remember what it tasted like.

Should be able to. LEDs are constant current devices (usually), so some details of the actual LEDs is necessary.

They same way that Charlotte grabbed you by the nuts when you suggested dogging. Have it with £2k I think you meant to type.

Are you sure, I could be like that bloke that wants to buy your walk on glazing, just keep stringing you along, then offer to pick it up if you pay for the 400 miles journey.

Find the SIM card and bend it. Or get a mobile phone blocker nearby, they cannot be hard to make.

Let me know how you get on with it. I have some small, "St. Ives", picture frames I want to spay up. Not sure when I will be passing, was going to see my Mother, but think she is now in Tier 3, so may have to rethink plans for my 2 weeks off.

I was at the SW Self Build show a year ago, only one company seemed to stand out, until I spoke to them. If I don't know anything, which is a lot of the time, I usually call my local college and ask there. What end of Cornwall are you? A Plymouth based installer is not that close to Penzance.

Pull it apart and see what sensor is in it. Probably a cheap one.

Hard to say, as generally, biomass burners need to work at their maximum to be most efficient. It could be that the heat losses from the TS are higher. Where is it situated? How well insulated is it? Taking @PeterWfigures, the store holds about 18 kWh of useful thermal energy. So should heat up in 2 hours.

30 kg is about 135 kWh primary energy. So once efficiencies are taken into account, you may be getting 100 kWh into the thermal store.

Well short of something being wrong with it, and the EPC numbers being well out, I would think it is.

I shall, for the matters of implicitly, reduce that heat load to 12,000 kWh/year, and assume that the heating is on for 160 days. So that is a mean of 75 kWh/day. But on the coldest days, you will need at least twice that, 150 kWh. Now your boiler is 18 kW, at its very best, in ideal circumstances, but probably closer to 15 kW. So it needs to run, just to cover the heating loads, between 5 and 10 hours a day.

A number of (general) things come to mind. If you can sort it out privately, do so. Can the SE pay, no point claiming against a person that cannot. Can you afford to chase a debt. Was it paid for on a credit card, can you claim on that. It the claim small enough to use the small claims court.

How large is you thermal store, your objectional biomass burner, and what are you heat loads?