SteamyTea

Mixed units. £1938/m². Could build a proper house for that.

The 9m² is for domestic. Commercial is totally different legislation. Mainly because they are dealing in hectares, 10,000 m², rather that a few m². Worth remembering that for every rule that says you should do something, there is another that says you can't.

Yes, but as long as it is no worse than resistance heating, you are better off. Why one needs to know the local weather. -10 does not happen often, or for long.

Can you get the logged data out of it and onto a PC?

Make a wall/fence/frame that is tilted.

Let us call that 4 hours, at 5 kW, 20 kWh. Water will start off at around 30°C and if we raise the whole 200 litres to 52°C, then that is 5.1 kWh. But let us make the whole job harder. Let us assume that the OP starts with a cylinder of water that is at 52°C and running it until the bath is full uses that whole 200 lt, and the water is in the Goldilocks zone. So now the water has to be heated from 8°C to 52°C, 44°C. 10.2 kWh. I think 6 kW is going to be fine. Would need to look at the performance curve of the particular ASHP to see what the CoP is at different temperatures.

Use relative humidity as a gauge. Find a level you are comfortable with, i.e. 60%, then reduce your flows until you get to that. Worrying about O, CO, CO2, NOXs, bacteria and viruses in the air is not going to make you more or less 'healthy'. I work in a place with air extraction so huge, it makes for a 20 MPH wind by an open door. I still feel tired after a nights work. It is normal.

kWh. kW is the power kWh is the energy. We really should use joules, J, for energy, then there would be no confusion. I would rather buy my diesel by the amount of energy I get, rather than the variable amount of energy that comes in a litre of it.

Good info, should make this thread even more fun.

Have you run it through PVGIS to see how it compares to putting modules flat on the roof? You may be better off with an East West fence with modules on either side.

Is that vibration or water noise?

Tax is a strange one. We have got used to income tax going down. We are about to have a rise in NI, and there is already a fuss about it. To me, I am not too bothered where taxes are raised, income VAT, Corporation, Council Tax, Death Duties. It all even out at the national level. Generally goods and services have got better over the last 40 years, every year is a Golden Year. It would be nice to have a society where everyone contributed, but we have created a very unequal society somehow. No idea what to do about it, but I think it will have to be changed.

There are a number of reasons it will only be a niche player. Like biomass energy in general, we don't create enough, so the CO2e savings are of no real consequence. During my weekly drive up to the Home Counties, I look at the solar farms that are scattered along the edge of the A30, M5 and M4. We have about 2300 miles of motorway in the UK, most is though farmland (as expected as we have only urbanised around 10% of the land. While not every part would be suitable to add 20m of PV to each side, it would certainly add a lot for very little cost. About 15 GWp.

Sum off least squared against the calibration gauge for every temperature bin. Or just use anomalies if absolute readings are not that important. Good enough foe me. Sun is out, so I am off out.

I have a box of bits, including a CO2, a Plantower particulate, numbeous BME/P280s and a few other bits. Really must start cobbling them all together. Kind of thing I have been keeping for when I break a leg and can't go out. (I broke my pelvis a few years ago but could still drive, so that was not enough of an injury)

Much of the oversizing is to do with the variation of your climate. So down here in Cornwall, the temperature is fairly steady i.e. very really 0°C and almost never over 26°C. But take the NE of the country and you often get -5°C, while the SE can see maximum temperatures of 30°C. Heating system are generally designed to cope with 99% of all weather events, for that 1% of extreme cold, plug in a fan heater. So knowing your local weather is important. So if I was up in the NE, I would oversize by 30%, in Cornwall, 10%. It is, in reality, a case of going to the next size up that is available. A 200lt DHW cylinder for 2 people will be alright.

I really need to get to grips with MQTT as I collect quite a bit of data. Fitting a BMP280 is useful. Just a shame that CurrentCost vanished as I like the Envi Opto I use to collect my energy data. Not sure what has happened to a couple of your images, are they links to local storage?

Nor me, but not sure how much slower I can go in mine to improve on my usual MPG in the low 60s. Anyway, not many BEVs would let me do my weekend commute. Now that I stop at Bourton-on-the-Water for a coffee, I am buggered if I am going to stop on the M% on the way up. (journey back is different, I am enjoying my high carbon cheese burgers, only £3.kwh-1, bargain in food terms)

I take it he failed maths at school. Or he only charges at the expensive places.

Yes. But if you look at the real price, it has not gone up for years. Gas has been way to cheap. Not as if we have never been told to do something about it in the past.

Did they tell you the wholesale future prices has gone down?

Will that affect room heights?

How is that an advantage on a MVHR unit that does a very basic job.

No.

I use less than that the 3 or 4 days a week I am away.