john0wingnut

Hi all I have attached a spreadsheet with my current calculations, and just wanted to run them past the forum to make sure I am on the right track. The current Bungalow floor area is 168m2, so at 0.3l/s that would require a minimum of 50l/s or 180m3/h. High rate would be 45l/s or 162m3/h for kitchen and 3 bathrooms and utility) We are planning on doing a 1st floor extension under the new PD rules, which would bring the total floor area to 243 m2, which would require 73l/s (263m3/h) minimum ventilation and high rate of 69l/s (248m3/h) 1) Have I worked those out correctly 2) I was looking at the Brink Flair 400 unit, which maxes out at 400m3/h. So in theory my background ventilation of 263m3/h would mean the unit is running at 65%, which I would assume is too high, so am I looking at needing a bigger unit, or getting say 2 units, one for upstairs and one for downstairs. Many thanks in advance John MVHR Calculations.xlsx

Im intrigued by this......... Whilst my position is not 100% the same, we have a field which is at the end of a shared driveway, which provides access on the west side of the field, which has houses along that side - and then backs on to other houses on the south side, so in effect, "capping" off the area with houses, from the remaining agricultural land. I've attached a rough site plan that Ive been playing with, as easier to visualise. I wonder whether one could apply a similar principle to it? SITE PLANv2.pdf

Dolle Uk do a 0.49 one in varying sizes. I had a young masters one in a previous house and this Dolle one is much better build quality.

I’ve just installed a Dolle Clickfix76. Decent bit of kit!!

Could you not look to use the rectangular style ducting which is flatter and wider? Failing that, you have a 50mm cavity, then 150mm of insulation, so you would in theory only need to reduce insulation by 25mm to allow for ducting

I probably wasnt really clear. The land in question is actually used as our garden, all be it 1.3 arces. So I suppose my thought process was, that being the garden of the property, it should be on the settlement side of things, along with the house. Fully appreciate that if I were to buy the adjoining field, it would be outside, but, this is essentially our garden and they state its agricultural land and hence not included. John

The thing I dont quite understand is, at land registry the land in question is part of the title register etc, thus part of the current house plot. So why does the settlement line bisect my current house from the land, when the current house sits 1m over that line?

CIL wise I would apply for exemption as doing self build, but Pre-App did not mention anything around SPA / SANG applying. True - re the % of costs. if one worked off say £500k, £25k is only 5%.

I have also had another quite off another firm for £12k +VAT, but that is on a normal basis, of me paying it from the outset etc, rather than a success based fee. John

I would indeed get it in writing, but he has stated £18k + VAT due upon successful granting of PP.

New house.

Fully get that POV. The field is basically a 1.3 acre garden as our current house is inset 1m into it. The Village envelope line literally comes down between the house and the field, which just seems odd, given it’s part of our plot. My thoughts were the same that if doing multiple dwellings, then it’s probably reasonable, but for one it seems very expensive, as I had a friend get PP on some land for £10k all in ( appreciate all land is different and needs different approach in some cases)

Hi all, I have a Bungaow with a field as part of the land. I say field, but we use it as a garden. I got a local land planner to do a pre app for me, for a 1.5 storey building on the field, which came back from the council as No, basically. Mainly around the land being outside the settlement envelope, And classed as agricultural, current road too my bungalow not up to standard in terms of width and visibility splays etc, ecology concerns as we have a large pond with Great Crested Newts and they wanted Archeological trenching done aswell. Needless to say, not a great start. All was quiet from this land planner, until last week, when he got in touch and said he had been mulling things over and wanted to make an offer of going for full PP on a success based fee. So I would need to foot the bill for ecology and archeology surveys, then if he successfully got planning, I would need to pay £18k + VAT. Ive already paid about £1800 for the pre app, ecology and archeology would cost me about £2.5k then his fee if he succeeds. So I would end up spending circa £26.5k to get planning on the land, which seems way too high to me, and I’m not really prepared to spend that tbh. Just wanted to get other people’s views as to whether this success fee is actually reasonable, or is it taking the pinkle. The cynic in me is thinking he wouldn’t bother taking it on if there wasn’t a chance of him getting the PP. Any advice welcomed John

I’ve just submitted my Pre App to Central Beds. Had acknowledgement next day and they say I will have a full written response by 4th March.

No. Blue = home usage White = grid import Green = powerwall - negative below the line is charging of power wall, above is discharge / use of powerwall. Yellow = solar

I look at it in the apps, rather than download, but the graphical representation of the daily graph tells the story nicely in that example I posted.

Solaredge inverters and Powerwall do track all of this.

Inverter 1 has 4Kw array and Inverter 2 has 3Kw. The powerwall itself can provide 5kw peak In the summer the grid usage was minimal and we still exported a load, as once powerwall charged and house using saying 0.5kw, everything else goes back to the grid. I ideally need another powerwall really. But, heatpump didnt run for most of those months, as DWH was done by the solar thermal, so solar + battery covered everything off and no pre-charging was needed during E7 Recent days has seen about 2-3kw max from the panels around midday, so in theory with the powerwall no grid would be required up to 8kw in peak light, but in reality its putting out about 1.5kw in winter light, so 6.5kw before grid during the day I would say at the minute

House background electricity use is 0.3kw. PV is straight into consumer unit, as is the Powerwall.

The powerwall powers the entire house demand, not just the heating. It has a "brain" which monitors pv generation and import export from grid, so knows when to charge and discharge etc

I have played around with this over the week. Tesla power wall pre-charges itself during E7, based on the forecast weather. DHW is now schedule for 50 degrees from 2-5am Heating comes on to 21 degrees between 3:30 and 07:30 (end of E7) Setback to 19 degrees from 07:30 - 13:30 Heating comes on to 21 degrees from 13:30 - 17:30 Setback to 19 degrees from 17:30 until next day repeats. I have successfully used no peak electricity from doing this, as between the powerwall and minimal solar from our 7kw array, it covers off all electricity need from 07:30am through to 00:30 House is toasty as well

No probs at all. Once it gets off the ground I can let you know. Long planning path ahead mind as there are all sorts of nuances to sort out: Shared driveway - current bungalows all share it and there is no recorded owner, so I have to put an add in the paper. Shared access way from main road - owned by first bungalow on the cul de sac, so have been advised that I need to get a solicitor to check and make sure the rights of access our current house / land have are passed to the new property its a narrow road and currently serves 6 houses. Planners may apparently get funny as we are increasing traffic (by 2 cars lol) The acre field - we have a pond which is surveyed yearly by an ecology firm as there are stack loads of Great Crest Newts in there / around it Currently classed as agricultural land, even though its being used as a garden and has been for numerous years, so going to apply for an LDC, before getting planning ..........so plenty for me to sort out. Also loads of applications have been thrown out in our area lately by the councillors. Mostly because people are just trying to shove a stack load of houses on small parcels of land, that all look drab and boring - those were some of the comments. So hopefully by going after a passive house with loads of eco features, interesting design etc, I should be ok. John

When I renovated the current bungalow I am in, we had a beam and block floor put in, DPM, then 100mm insulation and UFH pipes fixed to the top of that in a 70mm screed. The flow and return to the ASHP was channelled into the insulation layer, so I think they had 50mm underneath, then the pipe

The company I am potentially going to use did mention something along those lines, around the fact I am making an Eco home / passive house etc would hold weight, but I will take the above and ask them to utilise that paragraph