SteamyTea

Turn till loose, then back half a turn.

That was marketing/PR hype. I seem to remember reading that a mobile network base station used 5MWh/year. Not sure if I remember it right as that works out at just under 600W. A small microwave oven.

No. You are a (expletive deleted)ing useless twat with too much time on your hands.

Off you go then, you know how to do it. I am not your secretary.

Not possible to do as it depends on the make and model of ASHP, and the duty cycle. But if you have some unique inside numbers, post them up. No. Hardly an 'edge case' if it is constantly frosting up is it.

I am really not sure. Common sense say fan blows same way as wind, but it may cause over speeding of the fan (though I doubt it). I would have thought that there is really little difference, and putting the ASHP in a sheltered position is best, but not shaded as that may encourage mould to grow. Shall have to see if I can find any north facing ASHPs and see what they look like.

I did that about a decade ago. Just for my location though. Basically A NE wind, gentle, colder, but sunshine, SW wind, strong, warmer and cloudier

Until the direction reverses. I suspect that if the ASHP is close to a house then the windspeed is significantly reduced, especially at ground level.

apologies to @ProDave, @Nickfromwales and others i've forgotten, i do wish sparkies and plumbers appreciated this prior to renovations Did they drill holes, willy nilly, in your joists and beams. They are given a book that tells them what they are allowed to do. @Gus Potter If you are up for it, I may start a thread about something structural I was thinking about as I did the long drive back today (was even longer as there was a 'jumper' on the M5 with loads of rubber neckers on my side of the road.

OK, here is how it is proved. Sit in the shade with a thermometer and take several air temperature readings, then sit in the sun and do the same, but make sure that the thermometer is not affected by sunlight. Or, tell me how an ASHP can only take air from a shaded area, when it shifts several tonnes of it a day, how can it 'know' that it is in the shade, and the air it is drawing is in the shade. Air has a habit of moving about, luckily. Also, how do ASHP perform effectively at night? Not as if the CoP drops drastically. Also, the metal case would only hold a few kJ of energy, hardly a measurable amount, especially as the external heat exchanger has refrigerant gas expanding into it at about -23°C. Do you actually know how an ASHP works?

108 m2. Makes a volume, after insulation, of around 275 m3 My house, 48 m2 and 240 m3 I fancy one of these.

Has the 30 minute time limit been lifted then?

Link don't work. But I will add that a CO monitor is important.

Wish us 'ordinary' contributors could do that. Main reason I have never bothered with a blog. Be alright when @pocster becomes a moderator, then a simple bribe, or blackmail, will get anything we like posted up. Good to know that the old RPi is still chugging along. I left one logging at @joe90's some years ago, the 'sister' one at mine has been very reliable.

Hello. What can I say, sounds an achievement. Have you got my old employers to do a write up about it. Kind of thing they like. I used to have a place in Weymouth, sold it before the Olympics (but never thought they would go there). One day I will walk the complete length of the beach.

Would you notice roof integrated ones much? I can't remember which side of your roof faces the most south. As my house foundation is a good 6 foot higher than the road, I can hardly see my roof.

I would have thought that the best (in price and thermal recovery efficiency) you can find would do. The real cost is in the fitting, especially in a house already built. If you can relatively easily plumb it into the bathroom and kitchen, you are more that halfway there. You can plumb in the rest at your leisure i.e when doing other work or major decorating. Like ASHPs, being oversize is not a problem, they just run slower and quiet, with better efficiency.

Can't help with the costings, but. For a few hours car restoring, @Onoff will give you storage. In return he will give much advice about finishing of a bathroom restoration.

Here is some good news. House prices are up on the year, but down since September. So something for everyone. https://www.gov.uk/government/news/uk-house-price-index-for-october-2021

Can you look up a few EPCs and find what the average is. They are only calculated numbers, and often in error, but gives you an idea. You can work out DHW demand using Heating Degree Days. Again only a rough estimate, but somewhere to start from.

Helps reduce peak temperatures as well as when it is really sunny, it takes 20% of the energy out, as long as it has a full time dump load or us grid connected.

A2AHP for space heating and cooling. Exhaust ASHP for the DHW. Can be designed to solve the ventilation issue. My 2 bed house is smaller than this small 1 bed flat, and no space list to stairs and landing in a flat.

How about putting stickers on them. "I am saving the planet" Bit like those "I am a key worker" ones, or "Thank You NHS". Virtue signalling makes all the difference.

But has (expletive deleted) all to do with the air temperature. Meteorological stations the world over measure the temperature in the shade for a reason. Why a Stevenson screen is used.

The case of an ASHP has a mass of a few kilograms, and steel has a relatively low SHC, around half that of air. (mild steel 0.51 kJ.kg-1.K-1) It is also not the frost on the unit that needs defrosting, it is the moisture in the air that condenses and then fuses to the heat exchanger. If you want to store energy in metal, try Beryllium, it has a SHC of 1.8 kJ.kg-1.K-1, less than half that of water. There is a reason that ASHPs are not put in conservatories and lofts, they would suck all the energy out in a few minutes. If you think about it, UFH delivers at about 20 W.m-2, even a very dull day has solar power at >100 W.m-2, it is why PV, even at only 20% efficiency, is so effective.