Wagas

Yes. Thanks for all the comments. I can't seem to find a 10kw ecodan online to compare price, I don't even think they make 10kw...closest is 11kw. He's a local guy so it would be a nice job for him so if I go down ASHP route I will haggle him. I'm getting a couple of other quotes but here in the SE tradesmen are having a field day so I don't expect much difference in price. What are the advantages of a split system? If it's only to save on anti freeze then I don't see the point. Surely there must be some significant advantages

There will only be 1 or 2 people living in the house for the foreseeable future

He said something like "no need for expensive anti freeze" with the split system. Certainly don't want any noise... I was under the impression from him that all the noise would be outside

What do people think of this quote? Reasonable or expensive? I presume the 5% VAT is not applicable to self build... 150 sqm ground floor with first floor attic truss 2 bath and 1 WC Thanks ASHP & Cylinder Supply and install 1 x new Mitsubishi Ecodan SW-10-Vha2-BS 10 kw Split air source heat pump complete with 1x Mitsubishi EPHT 200L packaged hot water cylinder. Supply interconnecting 3/8 & 5/8 refrigeration lagged copper pipe, 2 x rubber big feet fix it feet for outdoor unit, 1.8 kg of R410a refrigerant, Expansion vessel kit, Fernox TF1 magnetic in line particle filter, set up commissioning and commissioning report. £8,600 UFH & Radiator Heating Supply and install 1 x 16mm clipped on insulation wet underfloor heating system to entire ground floor level comprising of 6 zones complete with digital dial room thermostats. Supply 1 x 8 port manifold complete with pump set, blending valves, air vents, temperature gauges, isolation valves, electric actuators, wiring centre to complete zone 1 heating. (does not include underfloor insulation or any form of screed. This work to be carried out by others) Supply 8 x Kudox Radiators (sizes TBC) to upstairs space (positions TBC) complete with thermostatic radiator valves & lock shield valves. Supply and install uponor 25mm primary flow and return circuits from cylinder to 16mm pipe feeds to radiators to complete zone 2 heating. £4,750 Hot & Cold supplies Supply and install uponor 25 mm/16mm primary hot & cold supply pipework throughout the property terminating at all toilet, basin, sink, shower, outside tap locations complete with 15mm isolation valves. Wastewater services Supply & install all 4” waste soil stacks with 1 to be terminated to atmosphere. Supply & install all required 1 ¼ & 1 ½ waste pipes from all required toilets, basins, sinks, showers to new soil stacks. Test new waste system for water tightness and required drainage. Second fix Install second fix sanitary ware basins W/C’s, shower valves, shower trays and screens. Install and connect kitchen & utility sinks complete with water feeds and wastes to and from washing machine & dishwasher. Run test and commission all installed second fix items. £3,700 Quotation Total - £17,050 plus 5% vat Grand total - £17,902 inc vat (if applicable)

Is it frowned upon to put the UFH down and screed before the central heating is connected? I guess the ideal scenario is to be able to turn on the UFH once it's been screeded to dry it out but our power supply likely wont be ready for a couple of months so I'd like to get on with laying the floor so things don't get delayed.

But if ASHP costs £10k more to install than LPG the savings will take 10 years to pay back no?

I'm going to have to big a big hole for a sewage treatment plant so another hole isn't going to make much difference to cost. Plus there's lots of outside space.

New build. I was told I'd need a 12 kw ASHP and looking online the Samsung for example + tank is £7.5k. Plus the inconvenience of trying to find a place to put the tank (no utility room unfortunately).

I'm struggling to get a mains gas supply so am looking at alternatives. ASHP seems very expensive at about £10k. I believe Calor sell an LPG underground tank for £1250 + £100 rent per year. What are the downsides? LPG is more expensive than conventional gas but what else am I missing? We don't have a utility room so having a gas combi boiler and no water tank would be attractive to us compared to an ASHP set up. Do regular gas cookers, UFH etc all work with LPG? Just looking for any negatives of LPG from people. Thanks

Ok, I thought so. Will aim for 6x6. Thanks

Would you say 5.6mx5.6m internal dimensions of a double garage is a bit snug?

I'm trying to fit the MVHR unit in a loft but have been told the Vent Axia units and similar are too big and will make changing the filters etc too difficult. Can anyone recommend some slimmer but perhaps longer units they've put in loft space? Thanks

Nope, think I'll scrap the tile vent search

No I need 17,000 minimum free airflow area and this is 10,000. I guess maybe I could use two of them? Think I need to speak with a few mvhr installers

I'm struggling to find a roof tile compatible vent that can be fitted alongside the pantiles we are having. The tile manufacturer doesn't make one and BPC's universal Klober vent is not compatible with pantiles - doesn't sound very universal to me! Any ideas?

@RedoctoberThanks for the pics Where would you guys put the manifolds if you don't have a utility room? The UFH designer suggested under the stairs but the stair area is small and will have a large glass window so I'm thinking not to congest/clutter this area. I was thinking about having some large cupboards where the red arrow is in the kitchen and putting boiler/UFH there. Any thoughts appreciated

ok got it, thanks ?

I guess the downside of doing it before plastering walls is the manifold is installed onto a section of bare block wall?

I'm not certain what the floor finishes will be, does it matter?

Hi, is there a view on whether it's better to install UFH and screed before or after plastering the walls or is there no benefit to doing it in a certain order? Thanks

I guess every local authority is different. I got very lucky and had an application approved in 5 weeks for a dwelling in the middle of an open field. My subsequent small variation application took about 12 weeks. Other applications typically took 8/9 weeks. I always thought the planning officers made their minds up quite early on if it's going to be a refusal.

Seems a bit odd that he hasn't even looked at it at this late stage. Did the Parish council approve it? If so you might get ready to have it called into committee if the planning officer says he's going to refuse it. If the parish objected to it you might want to start trying to find a local councillor who will call it into committee for you. I personally wouldn't give the planning officer a hard time, I'd just be preparing for the planning committee. Good luck.

Madness!

Oh and do brickies ever read the notes on the detailed plans??!! Or any tradesmen for that matter? I've got laminated A1 plans with easy to follow notes on them and they act all surprised when I'm confirming finished floor level with them when it's written on the plans as clear as day.

I'm thinking (hoping) there's a bit less to think about once the roof is on as there's quite a lot that can go wrong up to this point, or is this just wishful thinking and the opposite is true? I'm just trying to figure out spare time I might have over the next few months as the first couple of months of build has been pretty time consuming.