RichardL

Word to the wise - there is Mitsubishi Heavy and Mitsubishi Electric, Completely separate companies, very similar product lines - from what I originally researched very similar +ve reliability longevity reputation.

How big is your place? You don't necessarily need A2A inside units in each room - if you're semi open plan - or can allow air flow between rooms. e.g. upstairs a standard mini split unit in the master, or landing area may be enough - if you dont usually run heating at night but more top up in the late evening? e.g. This winter will be the test on 100% A2A - For upstairs: I've one inside unit in the master bedroom and another near the bottom of the stairs / central area - together they should provide enough warm air.

TBH - I reverted to even simpler than this a few months ago now, just use the immersion. 210l tank - its about £200 / year to heat from off peak 9p / kWh electric. Just a simple timeclock now 02:30-04:30 - pulls 3kW until the stat turns it off. Mixergy iHP looked interesting - they quoted me best part of £3k ... which although fun doesn't make any sense until off peak electric goes away - I'm guess that will happen when electric cars are mandated. Only planned update - When the oil boiler goes next year I'll use the tank thermostat for water temp instead of the immersion built in mechanical one.

Hi, Assuming you're not commercial premises or driven by some sort of regulation. 3-4 strategically placed Vapona stickers do surprisingly well & last years. Touch wood after year 1 in the house and turning the heating up that first spring, triggering a hatching a deluge, haven't suffered from flys since. https://www.ebay.co.uk/itm/225612501213

I hear a low hum, and lots of clicks (assuming the clicks are not what you're talking about) The low hum is presumably the machine working - I can't hear the compressor, that sound could well be the fan going?

...don't drill into the socket - into the horizontal timber just below... leave the socket as is. (depending whats underneath)

Hole in the unit corner & discrete grommet - then a stock spur socket out of sight? Perhaps just the hole to push the cable loop into?

Insulation first - added or by design as you mention. Efficiency of the heating system - IMO there's other things in the mix there too - robustness, maintenance etc are in the mix. A clever fancy new tech, or brand, that breaks and can't be fixed is going to kill any efficient running costs with replacement costs. Efficient shortlist certainly. Keep in mind though - your context will change, Say 18 months to 2 years in the new house you'll be comparing to last season's bill rather than your old house.

Phy above should have read Psy of course - but you get the drift! (darned auto correct & me in a rush )

IMHO Phycology is all wrong to force the seller to do anything... It's bad enough when they rush around and bodge decorating the place to sell it without forcing infrastructure changes too. Your heart generally just isn't in it when moving out, just want to leave - unless you have that developer mindset.

Lots of timbers will 'not in the wall' etc designation. What held the floor up? I mean - it wasn't structurally attached to the chimney breast or something was it ?

I customised Ikea Billy for a couple of book-walls in the front room, screwed together and top architrave to make it feel more like one piece of furniture. Uprights alone, shelf pegs, layout etc felt more efficient to buy than build (for me) across separate 2m and 4m widths. The shelf sag will get you on larger tomes - but as above if thats an issue, put them at the bottom or strengthen shelves with some L sections or a batten just in from the front edge underneath.

You're right - 1m out looks extreme ... Steeper roof slope to match the neighbour on the right of your picture perhaps to reduce the overhang? Did the planning officer make any suggestion on what he might accept?

Eaves height - can you extend the roof - deeper eaves rather than flush with the walls to meet his requirement?

Hi, Will they go back if you plaster behind them? Have you considered skirting to discretely cover them and/or completely bury in the wall?

Hi, What sort of connectivity does it need? Cloud/Wifi etc? My Worx Landroid perimeter wire gave up after 4 years with an intermittent disconnect somewhere and I'm not re-laying it so looking for options.

Absolutely - if Govt. made electric dirt cheap but left the market open to innovate on how to burn it for heat.... ? Perhaps that wouldn't work though - everyone would fill their houses with 2-3 bar fires? The challenge is - once things (energy) have no value(cost) theres no imperative to save them. Just thinking out loud - I don't know the answer to the above - unless you're Iceland with sharable heat - but artificial (i.e. law driven rather than natural resource driven) community driven heating and you're back in that common lowest denominator game.

UK has a history of other heating methods until recently - it depends when you start measuring? On the plus side UK is perfectly positioned to leverage that knowledge and experience and honing the technology from the top of the list though - we should thank the Fins and the Nordics et-al and jump on that bandwagon copying what works. I wouldn't worry too much about becoming a joke - no one is looking over their shoulder laughing - they have better things to do - or should do. Strikes me, usually, the best plan is to avoid nationalisation of anything - especially technology initiatives - sadly usually it turns that thing into a common lowest denominator, or the U.S. MO model ties it up in red tape to prevent active competition in law, or the middle men that cash in on grants and distort the market. The best you can hope for with government is not loading the tech with tax or duty.

Thoughts: (not necessarily solutions) - Do you need one in the kitchen? - If Bed2 can point towards the door it may heat/cool the hall when the door is open. - If Kitchen can point towards the door it may heat/cool the hall when the door is open - however - see above - if the kitchen doesn't need one & the lounge door is open that may heat the hall too?

FWIW - the chap at Solic just called me back. Sounds like they are still finalising their battery friendly firmware having found an issue with the battery friendly version they were using. He said once that's done they intend a 'return unit to them' for upgrade path for nominal amount. If this is of interest seems like watch Earthwise's website over the next few months.

1 year in - is the original contractor on the hook on any sort of guarantee?

@sharpener It turned out my planners - informally and formally didn't seem to test the MCS calcs in anger (unless behind closed doors) - both times I described what I wanted to do and, I guess, lucked out there was no issue. Sound & visibility certainly priorities in discussions and approval. 1. My initial informal query to planning emphasised location & size, referencing local planning policy of unit asking for a view on PD. I'm lucky enough to have space to neighbours, and on friendly terms, so less criticality on sound levels - but was not asked for detail TBH (notwithstanding the units are virtually silent ~1m away from them) 2. The second full planning (text linked in the forum), Referenced the PD. I was advised to be specific about units to be installed. So again - sound was important, I think I mentioned using qualified installers - but no ask for MCS calcs etc. I picked locations which are basically invisible from outside the property, discrete trunking and inaudible ~2m away - I know that's not always possible. Also offered to answer any questions to neighbours as soon as the planning notice went on the gate. Recommendation - if you can find local planning policy which says heat pumps are good idea - reference it. Ultimately the tone of the application needs to align with that policy. +Don't elaborate where you don't need to.

It's got to start somewhere - trying a coordinated approach at country level is hard enough, let alone global/above country. If you wait until everyone is aligned you'll be signing the contract on the day before the end of all things (too late) Who ever has access to the technology should move forward - stretch that envelope of what is possible and what is normal... UK is catching up with central European continent on insulation and heat pumps for heating - someone has to go first.

Green investment funds are already a thing (am I missing the point @SteamyTea ? I guess you're saying legislate for balanced investment... the trick is hearts and minds to balanced investment or you drive the investment offshore and a race to the bottom to get the $. Chances of a global agreement (on anything) are inversely proportional to the oportunity for $ or tax $ increases. Investments via funds are reasonably remote - i.e. the firms invested in will only really see their share price & investment outlook as input as a measure of doing the right thing. The closer you get to choosing which firms might/will add benefit - the closer you get to the risk until you're actually on the board! (No pension fund manager wants to be on the board of an individual firm - far too close to the edge) -so- Perhaps a green bond - funding a ring fenced gov. / country level investment - but then gov. isn't going to be anywhere near efficient or agile enough to use that money wisely. -or- venture capital as middle ground - but again - they tend to look at the bottom line and assets vs. profits & will - depending on your point of view - asset strip or - better - trim/lean out a firm to its core function. -left with- the philanthropist angle - Gates/Musk/Demos etc - are they different from the above options? - I guess theres potential for a single decision maker - Gates is focused on medecine, Musk on batteries and rockets, Demos - who knows? (Happy to be corrected on the above - its been a while since I was even remotely in finance)

Nice - those features would be perfect - I wonder if you can upgrade the firmware?