SteamyTea

Every few years it is a Sunday. It is a Saturday this year.

"Is it April the first"

I think this is part of the misunderstanding. There is ability, intelligence, knowledge and qualifications. There is usually a decent balance, but we remember the ones that are unbalanced.

Will cost you £350/hour for me to read that.

Not in a lot if countries where the profession is protected. I started my engineering career as an apprentice, got my technicians certificate as it was called then (production engineering), then studied proper engineering (HND in Automotive Engineering), then a couple of years evening classes to upgrade it to a proper Degree. Then, many years later did two more Degrees (Renewable Energy and Environmental Science). I don't call myself an Environmental Engineer as that gets confused with the person that cleans the bogs in a cafe. A bog cleaner has probably contributed more to general healthiness than I have. I don't know why you would not get a thermodynamisist to design your heating, or a physicist to design the structure of a home. Are you getting engineering design and layout confused?

In the UK we tend to have quite low barriers to entry to set up a business. Apart from a few technical jobs, there are no barriers i.e. anyone can be a computer engineer, or gardener. We do tend to have high business running costs i.e. vehicles, premises, insurances. I cannot comment if customers have high expectations, I suspect they tend to be the same globally. What we do have a lot of in our trades, is qualification inflation. This is where the seemingly high prices charged come from. I pass a lot of vans with 'engineer' written on them. If you want pipes fitted, get a technician, if you want the heating system designed, get a thermodynamisists to design it. Not the other way around. That will lead to problems.

Depending on your roof angles, March can be a good month because the 'direct solar beam' aligns nicely with the roof, creating a flat plain. Yesterday Cornwall was getting, during the day, about a quarter of its electrical power from local solar.

There are often copies of the OnSite guided. They give you the derating factor.

Is that when in use, or constantly? My bathroom is similar in temperature to the rest of the upstairs, mainly because I never shut the door.

She does not end her shower in 6°C water. Humour me, next time she finished showering, run the hot kitchen tap and see what the temperature is.

@SimonD I may have missed it, but do you know your pressure test/ACH figures?

While that looks right, I doubt the whole 300 kg starts at 6°C. DHW below 30°C is of little use, that is a pretty cold shower. So less mass DHW is probably heated i.e. @ProDave washes less than he thinks. That like does not make sense. 52,718.4 kJ/3600 s = 14.644 kWh

If you just heat the air in the building you will have less overall thermal losses, which points to an A2A as opposed to A2W with UFH. Not sure what you mean there, water has an excellent specific heat capacity.

Ok. Cornish granite.

I think in reality they are all much of a muchness. The technology should not be confused with the sales department. Problem best to get one with the easiest to use controller.

Not as much as my imagination.

I can top that. I went to boarding school. 16 14 year old boys in one dormitory. An interesting smell. Also. Try 30 16 year old school failures who wanted to become .com millionaires in a room, with 30 200W PCs going. Not one of my students ever felt drowsy. 12 plumbing apprentices learning ITC, no problem, till the girls doing sport started playing soccer right outside. Only one student took any notice then, and I can say I did let my eyes wonder.

My rear is coated in 20mm crushed granite. Noisy, but done a good job over the last 17 years. Bits still get picked up by my walking boots, but most of it has stayed in place. I did put a weed membrane down first, but that has long disintegrated.

C2H5OH + 3O2 → 2CO2 + 3H2O 1 more water molecule than methane. 1 less than propane. If you really want to cause damage, burn butane. Twice as much CO2 and 2.5 time more water.

The point is that you will not feel it once 1.5 m away. You could go out and find one that is running and see what it is like. At the college I was at, they had some huge units to heat and cool the library. We all used to stand by them and smoke. I can't remember every feeling a breeze from one of them, unless I put my hand by the grill.

The energy is wind is proportional to the cube of the windspeed (I think, how wind turbine yield is calculated)

Wait until there is a real problem, i.e. neighbours complaining. Then build a screen around it.

I have heated 50 m2 with less energy using old storage heaters.

Been done, and failed if I remember correctly.