NSS

Surely it should be everyone's business if the intention is to evade paying the tax that would otherwise be due.

Haven't read every word in the thread, but not seen any mention of the other consideration that will increasingly need to be made - cooling. Our heat pump is primarily there to heat water and space, but can also cool the space and would be used to do so far more but for the fact that we have SageGlass.

We have 165m2 with u-values of 0.14 (walls/roof), 3G windows (circa 0.7u), air test result of 1.6, 9kw Panasonic Aquarea T-Cap monobloc, 4k PV, power diverter, and our total import from the grid (no gas) is circa 5.2mW per annum (about £700). Your air test will certainly be hurting your consumption, as will having no PV, but even so £200+ per month seems high to me. Oh, and we heat our DHW to 55C.

I'm not sure the consistency argument can be applied if the regs have changed since then. Try speaking to the Fire Service maybe?

Not saying this is the reason, but you may have fallen foul of the access width required for fire appliances. That requirement may not have existed when the previous development was approved.

It uses clamps, but the voltage can be selected in settings. Currently set at 245v as per the indicated voltage shown on the SE inverter.

Very long story which I won't bore you all with, but our Efergy Pro finally went live earlier this week. Initial observations are that the figures it displays do not accurately mirror those for a) generation as indicated by SolarEdge, nor b) grid consumption indicated by the smart meter. Hopefully this is something that can be fine-tuned to be more accurate but I'm awaiting a response from tech support so will report again as to whether this is resolved. In the meantime, what it is does appear to show is that we (so far at least) utilise far more of our PV generation than I imagined - at just over 96%

I know it's SageGlass, mine was the first residential property in the UK to have it (or at least that's what SageGlass told me at the time).

I doubt it could be used on bi-folds anyway due to the requirement to run cable to each individual pane of glass.

Agile rates have been up with the recent cold snap but tomorrow's rates are off the scale!!!

Isn't this (Section 75) cover limited to purchases up to £30k ?

Went live with Agile last week. Cost saving against standard tariff (Octopus Flexible) is 35% for the first four days.

We have intentionally not changed our usage pattern (it was pretty disciplined already having reprogrammed the ASHP to suit the Agile tariff about six weeks ago), but cost saving for energy used against the old tariff is currently averaging just over 30%. That's only 3 days of data to date though.

Well we finally went live with Agile on Wednesday as the meter wasn't commissioned properly when first installed. Early days yet but already seeing a substantial (circa 30%) cost reduction versus Flexible Octopus.

Welcome, you'll find many dreamers here. The trick is avoiding the nightmares, but it sounds like you at least know the direction you're aiming to travel in. We built 165m2 TF with similar aspirations. Detail is everything and will result in the dream becoming a reality. Good luck ?

Any number of new builds around here with as few as two PV panels on the roof. Presumably there to help the developer reach the required EPC but, from what you say Dave, probably all but useless.

Indecisions, indecisions, indecisions.

Be mindful also to where any condensate drain exits from the unit

As mentioned, developers don't have to test every property so that figure may not even be for your home, just one like it. That means that yours could in fact be better or worse. The only way to know is to do a test on it.

Probably not of 1.1 acres in an AONB though Dave.

Everything is relative. There are areas where £30k won't get you a single parking space let alone 1.1 acres.

Had our SMETS2 meter installed today to enable switch to Agile as our fixed-rate tariff has just ended. New rate would have added circa £90/year to our bill so decided to give Agile a try. Spent the evening working out the optimum new program settings for the ASHP.

Welcome. Would I be correct in assuming the Victorian building you speak of is an ex-school?

Depends on what sort of provision you're making I guess, Joe. In our case, the addition of the Panasonic Air Rad required both a dedicated fused spur and the supply/return loop for heated (or cooled) water from the ASHP. As you know, the provision of cooling capacity was as important for us as heating capacity due to our requirement to keep a sealed environment for air quality.

Late to this thread so apologies if what I'm about to add has already been covered. We have a 1.5 storey (chalet bungalow) of total 165m2 of which is split circa 75% ground floor to 25% first floor. We have wall and roof circa 1.4, Windows 0.7, airtightness of 1.6, Panasonic 9Kw ashp, Paul Novus 300 mvhr and an EPC score of 96. Not the best on here but not bad, but we still find during really cold spells (we're on the south coast so we're not talking Scottish Highlands cold) that we appreciate the Panasonic air rad in our bedroom. As already said, mvhr won't spread the heat and even in a well insulated house we find very little heat finds it's way upstairs (though that may in part be due to our design which has the staircase in a floor to vaulted roof space that has outside walls to three sides). I suspect someone somewhere later in the thread will have suggested at least making provision for some heating upstairs, but if not then I'd strongly recommend it. Easier not to use it than find you need it when it's too late to add.