PeterW

Any grid system will allow airflow into the garage so you will negate the benefit of sealing the door and any heating benefit. I would also check that under Part L1 you are not causing yourself an issue with BRegs as the whole of the garage will need to be insulated to minimum levels and potentially included in any air tests as it becomes part of the heated envelope of the building.

I can't see why as it's an unheated space ..??

Is this an internal or external door..?

And a 300 UVC taken to 45c on the ASHP and topped for the last hour with the immersions at low rate should last you a good chunk of the day

Not sure you need such a big buffer tank ..?! 400m of pipe is something like 52 litres so 3 times that at 35c would be fine I expect as you will have a fair bit of time when the DHW is up to temperature and not calling for heat.

So I changed from Eon (meter install) to Ebico about 4 weeks ago and had the final bill from eon... estimated final bill of 550 units, even though I gave Ebico / SSE the correct reads which would have been for 5 units so no idea how they have got the random number they have...! SSE are blaming eon, eon are blaming SSE so I've just hit the dispute button...

They used to do a stem version too with the pocket included but seem to be out of stock.

My beer fridge is a peltier unit and a fan and I reckon you could have the whole lot out and into a cool box the size you want in half a day

No ... you would be creating a distribution network from what I understand which has a significant number of additional hoops.

I would rather hack off my left manhood appendage and fry it with chillies than have a Calor tank within 50 miles of my property.... They are clueless wonders who conveniently "forget" that LPG prices can go down as well as up with global demand. When I said I was leaving due to price they offered to beat the new supplier by 1p per litre.. That was a drop from 46p to 33p on one phonecall and I worked out they had overcharged for about 3 years... They also wanted £2000 for a buried tank - local supplier did it free gratis... Find a local supplier who has a good reputation and also look at underground tanks. I would doubt you can share a tank, but it would be a good bargaining chip to get some decent pricing if you did have 2 installs and 2 tanks.

OK thats the puppy I have... If you look at appendix D.2 its a W-Plan they are using BUT there are a number of issues with it how they have it configured The Hot water and UFH feed have to be the same temperature (ie 45c) which does nothing for your COP and is too high for direct UFH Connection If you go direct UFH then there is no circulation pump so you are reliant on the ASHP pump circulating the floor and that will get cut off the moment the cylinder stat drops below the set temperature. The W plan wiring doesn't allow for heating when the DHW is off at the controller so you need to modify the wiring slightly to put power to the off terminal and enable the diverter when the DHW controller is off. Without a buffer tank, the ASHP will short cycle so will be innefficient and potentially cause other issues. To do all of this isn't complicated but it needs the use of a couple of pipe stats, a changeover valve and a relay. So you need 2 of these - one set to the DHW temp (47c) and one to the UFH temp (32c) Immersion Thermostat And one of these - must be the CR5-02 Version - 3 Way Valve And a standard 220v change over relay DPDT Relay Those valves have the benefit they don't burn out synchro motors, and they can drive the changeover relay. Wire the stats to the output pins (pairs) on the relay, with the input pins to the control box terminals marked as "thermostat". Wire the coil to the WH/YE circuit on the valve head so that when the valve opens to connect the ASHP to the buffer tank/UFH then it connects the relay and switches the pipe stats from the "DHW" temp to the "UFH" temp. The DHW "Off" position on the time clock needs linking to the Heating "On" in the W-Plan so that in the event you don't want a permanent hot water cycle then the valve will drive the ASHP to heat the buffer. Both of the tank control stats are used to drive the pump on/off terminals on the ASHP control box. Finally..... the room stat drives a zone valve between the buffer return and the manifold so it only has access to heat when the stat allows the valve to open. I've got this drawn up somewhere but need to find it !

And BRegs say that under floor void is fine, if it's not a truly room sealed stove just point your installer at your MVHR intake and ask them to measure that - usually far more than the mm2 required ..!

What size is the stove...?

All you ever wanted to know about leadwork from the definitive source .. http://leadsheet.co.uk/home/lsa-pocket-guide/

Don't forget that PP gets the outside approved - what's inside can change up to the point you start building ...!

Looking good @Dee..!

GypPrime = PVA + Brand Markup..

Done ..! @AliMcLeod if you log out and back in you will see a "Create Blog" button at the top of the blog page

Welcome ..! If you want the cathartic writing option, why not create a blog on the forum ..? Plenty of subject matter to get you started and we all like a picture or two, especially of 3D models ..!

So I can sympathize with that ..! Have you got your warranty sorted ..? If not I can give you a direct contact for a warranty provider and cut the broker out of that one too ..!

Plenty do - and a properly laid pipe with lintels or movement joints as it passes over the founds should mean it's fine for decades. UPVC is inert and underground it has none of the problems of sunlight etc. degrading the plastic. Is it shown on the plans ..?? And if you've got B&B floors then there will be no impact or loading on the pipes.

I've done 400m off one 5 port manifold and the issue you have is that the manufacturers like to quote at low deltaT so they don't get caught out with not enough heat being available. Persevere with LoopCad and it's excellent - mine were accurate to within 10m overall and I used the Wunda trays. Zip tying to mesh will be pretty easy if you can space to the mesh size. Is it ASHP or gas boiler ..?

I think he's been flushed with success on that piece of expert design ....

East Coast Fibreglass and CFS are two suppliers who I use. Both sell flat flat roof kits and have decent tutorials too online

Following that discussion about drying towels, I've stuck with the idea of a reasonably central extract in the utility above the drying rack. I've also got the UVC and buffer tank in a plant cupboard off there so working out a way of extracting that useful heat into the MVHR too.