Marvin

I'm not sure what this means. When they talk about heating a room Ofgem use the phrase "space heating". Why didn't Ofgem say "space cooling" instead of water cooling? If no one knows the answer I will have to ask Ofgem.? Any help out there?

Hi IanR Thanks for this. I think you said this before. Sorry I didn't take notice. I will follow this up with my supplier.. M

https://www.imsheatpumps.co.uk/ On their Web site ( you have to search ? Answer: A 6-8 kW horizontal ground source heat pump system usually costs around £10,000 to £12,500 to install. A larger 12kW horizontal ground source heat pump system would cost around £15,500 to £17,500 to install. Vertical ground source heat pumps are more expensive due to the drilling of boreholes, so the equivalent 12kW system would cost around £30,000 to install. Hope this helps.

No one. However... https://www.imsheatpumps.co.uk/

Yup. Assume your talking about a closed loop system. And costing about 30k

Advised to use port valves to separate types of emitters. So extra valve and a switch.

Yes but I'm using it for heating. ???

Slinky trench typical example 10m long produces about 1kw so 4kw equals 40m trench. However spacing between trenches 5m apart. So 200 square meters for 4kW Single pipe down a trench about 15w per meter. Trenches about 1.2 meters apart. So 4 kW about 400 meters square? All as rough numbers depending on lots of factors but you get the gist.

My guess is plinth in front....

I'm testing how worth it is We have started to organise cooling using the ASHP. The unit can supply down to 7C. Running through the radiators at 18C we found condensation collected on some radiators. So next time we will run at 20C and see what happens. Our next experiment after that will be through the coil in the MVHR

Yes. https://www.planningportal.co.uk/info/200130/common_projects/27/heat_pumps/2 More distance between ASHP and item to be heated/cooled equals more inefficient.

As far as I understand if an ASHP installation is to be covered under PD then the heat exchanger unit has to be no more than 10m from the buffer/hot water tank.

That's one of the problems with GSHP systems: The design and installation are critical. Unlike a hot water tank which usually has a fairly swift recovery rate (unless your covered in s*** and waiting to have a bath) the ground can take a lot longer to recover its original temprature.

More info on above https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.geothermal-energy.org/pdf/IGAstandard/WGC/2020/01018.pdf&ved=2ahUKEwjK7a_3ppnyAhUTgVwKHeAUCb0QFnoECAYQAg&usg=AOvVaw3CtNYvl34E6GpgqL14rNoJ

There are currently about 30,000 GSHP being installed per year in the UK. What puntloos has read about is a system installed that is not fit for purpose. You cannot say my mini is s*** because I can't tow my caravan. My mini works perfectly well. Correct that the outside ground will freeze but only if there is too much drain of heat in that area. This would be a result of incorrect sizing of system or too much pipe per square meter or too shallow a trench. There is too much information calculated and evidence to refute that installed GSHPs work, as with ASHPs. I await the contradictions from the 30,000 people who had systems installed in 2019. M

55mm

I thought it was 3 times the thickness of the sheet as a rule, but this may have changed now...

My light weight compactor will handle type 1 ok, but not bits 100mm by 200mm as in your photo. M

Yup MOT type 1

If the surface is to be left exposed then the areas of fines will wear away easily. Like driving on a beach. The mix is important. In Ministry of Transport type 1 fill the different grades are blended at source for maximum when compacted. This material is known as subbase.

I understood to make a good surface the crushed concrete should be mixed fines, small and large items. The maximum size of the crushed concrete should be no more than half the thickness of the layer to be compacted and the fines should fill all the voids when compacted avoiding the fines in the ground below rising up to fill the voids causing the area to sink. I usually compact the filling until no more fines will go in. the fines hold the larger pieces from moving. Good luck. M

As far as I understand - yes. M

I understand these heights are set so when you sit in a wheel chair you can reach the sockets/switches and consumer unit.... in case you get old and frail and don't want to spend 6k a month for a care home because you can't turn a light on.

Well I know little, but first suggest that if you do go ahead with the insulating without BC about, make sure you take plenty of photos which clearly show both the work being done and that it's your building. Secondly in my experience I think that you have to have at least 25mm insulation between the joists and the plasterboard to achieve BC requirements. When the joists are insulated in between and the plasterboard fixed directly on to the bottom of the joists to form the ceiling, this can cause cold lines on the ceiling where the timber is which can cause condensation to collect and leave marks. And as Faz says still need to achieve the U value. So I don't see a way around it. Best of luck Marvin

I'm with Nickfromwales. Board suitable for fixings, coverd with fire board. I also insulated the walls to reduce the excessive heat escaping.