SteamyTea

Yes, a very important point. The electrical shock risk is reduced, but not the fire risk. All switching has to be capable of dealing with the DC currents as well. Not a case of assuming that ordinary switches can cope.

Don't nearly all bricks come out a furnace.

Drug dealer is he? Next time you are there, ask how the wall mounted heat pump is working.

The living room.

That is a brilliant idea. Probably cheaper than paint. I feel the old Blue Peter joke coming on about what has no arms and legs but sticks to the wall.

Kill everything, just incase there is something interesting to ecologist.

But you may hit problems if you put services in for the caravan. Limited to a bit of gardening really.

Welcome. Check the Community Infrastructure Levy (CIL) situation before you start anything. Don't want to get clobbered for a few grand.

Hard to tell what has gone wrong. I suspect there is a chemistry mismatch. That may sound a bit vague, but what I mean is that say the original coating was a PU coating and the new stuff and as an epoxy (or the other way around) then you have to sand back to the original substrate. New doors in the right colour would be safer.

If you went down this route, wouldn’t the increased airflow dry out the place too much, such that you would need an enthalpy exchanger thingy as well as a heat exchanger? Possibly, it would depend on the starting conditions. Doubt you would ever need to increase humidity down here.

Can you get a pipe freezer and fit the valves that way? https://www.screwfix.com/p/arctic-products-pipe-freezing-kit-150ml/433fj

I would have filled your house with smoke quiet happily. And I did not remember, at the time, to mention the huge leak around the WBS air inlet.

You can have both. One system to move air around the building, and then the MVHR. A bit of clever design and the MVHR can be 'injected and extracted' from the air handling unit. Yes, as I said, design on the system is everything.

It is possible to use a ventilation system to move heat around. Just a case of making it bigger, or moving air though it faster. If you have the room, larger ducts are easy to fit, takes some careful designing to not look odd, and watch out for room to room crosstalk. Quite a few of us on here do not have heating upstairs, we just rely on natural convection and conductance through the ceiling from below.

I took a video of it, think I posted it up here somewhere. There is a topic about making a DIY blower in here. It is basically just a fan fitted to a board, then fitted in a window opening.

Welcome Gaz Can't help you much at all in making a decision about PMing or no. But regarding the trade networks, just last night I fell asleep listening to this: https://www.bbc.co.uk/programmes/m001r1fy It is about networks and how the are interconnected and react, well worth 15 minutes of your time. Seems that in some projects/companies, those at the top have no interaction with those at the bottom. I am was a dreadful manager as I assume everyone lese has the same vision, but they don't. Just yesterday I explained something to a work colleague, why it had to be done, how it needed to be done and how long it would take, then watched them, while I am still there, totally ignore the instructions and carry on doing what they always did. (expletive deleted)ing twats, the term efficiency often gets confused with rushing.

It is because they are crap. Just read this old study, then think that the two main UK manufacturers of small turbines have gone bankrupt, never to reappear. https://www.sciencedirect.com/science/article/abs/pii/S0378778807002939

I am better at incompitance. Welcome. Just swear first, works for me.

You can read this. https://www.sciencedirect.com/science/article/pii/S0378778817323101

A PU glue will work well on polystyrene, though you would probably get away with a cheap PVA one in this instance.

Which bit you interested in? Basically you can buy the cheapest Raspberry Pi Zero W, 4 DHT22 sensors, a light dependant diode and a cheap electrical meter with a pulse LED on it, wire them up and log the data to a file. I have know idea if you have any coding/Linux experience, but it is really quite simple to set something like this up with instructions. A few quirts to overcome, but basic stuff. Here is a bit about the energy meter.

Does the name Peter Rachman ring a bell?

Are you going to put a temperature/RH logger on it, maybe one of my cheap energy meters as well. Should cost about 40 quids all in. Airflow would be a bit harder to do, something I keep meaning to look at.

Have a look at blown in cellulose insulation.