SteamyTea

Or no, if you want to install it yourself, it avoids the certification. What are you doing about the very hard water in Bucks? Fur up the heat exchanger and you may well be into a new thermal store. I had so much scale in my cylinder it actually poked itself out the side.

Probably not, it is the kind of 'sticky plaster' solution that an Architect will come up with. My solution would be gas for the DHW and an ASHP for the space heating as that will probably deliver at the lowest CO2 levels. DHW really is a pain as you either have to deliver on demand and possibly suffer the lower flow rates or store and suffer the thermal losses. The Sunamp does address the losses (as does a well insulated cylinder) and takes up less space.

I am not an expert on makes and models of combi's, and being from a renewables background, not that pro them. But from my understanding you get get some models that can modulate down, while still condensing (and therefore being more efficient) to a relatively low level. With DHW you do at least know your minimum and maximum usage, so model choice is fairly easy. And there is nothing to stop you having two boilers.

Then you look at all the heating options and decide. The options can include air to water heat pumps, air to air heat pumps, gas, solid fuel (though not a good idea), electric (low capital cost).

I like the idea of DCV, but is it really just a poshed up single room ventilation system? Some people have fitted CO2 and RH sensors to their MVHR, so this amounts to the same thing. Seems to me that when fitting MVHR, the initial design/layout is important as it makes fitting easier.

Welcome. Bucks is a nice county, have family there. Rather than think about the heating system, have you looked into the energy requirements of the house. Without knowing the heat demand it is hard to recommend anything. You may find that improving the overall U-Value is cheaper and easier than a more complicated heating system. Domestic hot water (DHW) and space heating really shoudl be kept separate, they do different things at different temperatures and at different times. As you are having a flat roof, have you totally discounted having photovoltaics? And how do you intend to get a 100% watertight roof?

Why does it need the internet to be set up? And why does a designer have to come. Sounds way too complicated for what is, after all, a domestic appliance.

what I would give for a bit more warmth

I listen to Radio 4 on Digital, so 40 years and 3 seconds behind the times.

So do I, they make a room into a corridor.

Cause it was Prep School, prepped for what had to wait till I was older, and moved to Oxfordshire.

I escaped Essex when I was 10, think I missed my bets years down there. Having said that, the South of France and the Caribbean where petty good. Just a shame I was sent to school in Kent!

Looks like a 1970's office intercom. "This is Carson your doorman".

So comes with the brick layer in the tub then, cool

I was, on your timescale. Truth is I hate going up in the loft, it is depressing because of all the junk up there.

I shall try and find some pictures of mine. About time I did Mk3.

Yes, it should be decimal fraction wall area, not percentage though. It does not take into account shape of wall and if it faces the wind/sun. But they are minor details at this stage.

I think this is an idea opportunity to make a cheap MVHR unit. Not that hard.

Be worth knowing how he works out his quotes

Perfect. Can connect these to it.

Have a large breakfast or a decent lunch before food shopping. My freezer is a my local corner shop, a 24/7 Tesco Extra. Been known to buy a frozen pizza and a new router at 6AM, fantastic.

Simple, plug in some monitoring equipment. Works for me.

Maybe be worth a couple of very small fans on timers, see if things improve. If they do then you know it is a local problem and not a general one.

Pointy can go too far though.

And one of my all time favourites