NSS

Appreciate that, and agree a test before plaster boarding is sensible. However, my point was that an air test on which an 'as built' SAP calculation is to be based should be conducted when it's built - fully built, even if that's a second or even third test. Anything based on an earlier test could be some way off reality.

Must admit I've wondered about the MBC air test timing, and whether people then use it as their as built SAP calculation when presumably a lot can change once they've left site and other trades move in. It's one thing to guarantee a near air tight box, but another to maintain that level through first and second fix.

Maybe I should change my user name to NickF35B ? Oh, and welcome ?

You can set the thermostat temp for the immersion to whatever you desire and excess PV (via a diverter) will lift it to that setting so long as there is sufficient excess from any other energy usage at the time.

Likewise ?

You'll no doubt recall @Jeremy Harris(hope he's okay btw?) describing multifoil insulation (and/or claims about its performance) as 'snake oil'. I wonder is there a new candidate for the description ?

Had a look back to the first page of this thread, and the two previous one's from which it emerged. These questions over SunAmp have been doing the rounds here for over 18 months and still nobody seems confident that they are a reliable, cost-effective and easy to configure/control solution (for most applications at least). Given the level of technical understanding on this forum (compared to the average of Joe Public), imho it seems hard to envisage how SunAmp can hope to be a mainstream solution in its current format - unless of course it's Joe Public's lack of knowledge/understanding that makes them attractive customers.

Possibly when it's just the two of us here, but I'm not overly bothered as most of the charging is done during daytime hours when the ASHP is often being powered by PV.

Our ASHP heats the 300L cylinder to 45C (except every Monday when it does a Legionnaires cycle to 65C) but the power diverter sends any excess PV generation to the immersion. Suffice to say we've never run low on hot water - not even back in the good old days when friends and family could come and stay with us!

Incidentally, all the readings are taken on specific spots for consistency. There is of course some variation on, for example, the floor temp depending on where measured (currently ranging between 19.2C and 20.3C).

Turned the cooling off before we went to bed last night but back on at 8.30am today. Even hotter day today but has remained very pleasant indoors. Air temp in living area at 8.30am was 24.1C and upstairs was 24.3C Air temp in the living room is currently 22.9C and the floor is 20.1C. Upstairs air temp is 23.2C. Outside temp at 8.30am was 27C and just now (5.30pm) is 30C. I currently run the ASHP at circa 18C in cooling mode so could probably drag the slab temp lower if I reduced that but have played very safe re dew-point. Will turn the cooling off around 8.30pm (not much PV by then anyway) but repeat again tomorrow.

Around £900. More than the equivalent Gledhill at the time but decided it was worth paying the extra for the cylinder that was designed to work with the ASHP we'd chosen so as to avoid any blame games if we had any issues at a later date.

Really? Heat loss on our 300L Panasonic Aquarea is quoted at 85W (so circa 2kWh per day) which at a COP of close to 4 is 0.5kWh to replace via ASHP and free if the sun is shining anyway.

I'm with you Joe. We have a 300L DHW tank which can be heated by the ASHP, directly by PV (via diverter) or via the immersion. Belt, brace and a safety pin ?

Well, three hours in cooling mode and the floor temp is down to 22.2C but the air temp in the living area is actually higher than it was three hours ago (currently 25.1C) but I suspect that's because heat is still permeating through the wall/roof. Upstairs air temp is down to 23.4C. I should probably mention that 1/3 of the L-shaped living area has a vaulted ceiling with lots of south and west facing glass and a pitched roof that faces east and west so there's a large surface area exposed to direct sunlight for most of the day. Edit to add: doesn't help that Mrs NSS has been cooking of course.

Active cooling deployed this afternoon for the first time this year. Despite the SageGlass being on full tint all day, the temp in living room had hit 24.6C by 4.30pm (outside temp 31C) so have turned on the five UFH loops that serve that area. Upstairs temp showing 24.1C (very little glass upstairs by comparison) so have also switched the air rad into cooling mode.

Welcome. A family of 7. Yep, I can understand why sewage treatment would be a priority!

We have the Jetfloor system. Funny thing is it was about 15% cheaper than Tetris when we had our quotes (about 5 years ago). Makes you wonder sometimes whether someone just sticks a finger in the air on prices.

Why bother with shipping containers. Old (and even fairly new) 747s and A380s will be cheap as chips for the foreseeable and come with leather seats, first class beds, a bar, toilets, kitchen... What more could you need?

Okay, seriously concerned about Jeremy now. Twenty posts in a SunAmp thread in the last three days and still no sign of him. Something's not right ?

Seems a useful device to aid social distancing (and not just on building sites)... https://www.google.com/amp/s/www.theconstructionindex.co.uk/news/view/bewleys-buzz-bands-maintain-social-distancing-on-site%3famp=1

Yes, and we have used it on odd occasions (for example last year when we had temps hitting 30C+). Reasonably well insulated (circa 0.14 floor, wall and roof, and 0.7 glazing) and Paul Novus MVHR. Also, bear in mind that we have relatively modest glass areas - more than you might find in a typical developer built home but we don't have huge glazed walls. Using SG for the latter would not only be expensive but may not be as effective in reducing overall solar gain so I would suggest active cooling may be essential.

Then I can only tell you that he's talking out of his anal orifice. Just taken this with camera held virtually parallel to the glass.

Indeed, and no as I got rid of the Jag last year ?

This spell of exceptional sunshine has exposed a flaw with SageGlass. It reflects so much sunlight that it's scorching the lawn in front of the main south-facing glazing! ?