Unbelievable EPC recommendations

Not for me it doesn't, it simply asks me how much electricity I use when I've drilled down through all the entering of who/what/where.

I trieds it once before with the same result, I assumed therefore that it only holds information that users have entered.

What's the link for this site which shoes a particular house's energy consumption?

When I tried the site, I saw only an estimate for my current energy costs. One of the pages said: "Your current tariff. Your 'Estimated Annual Energy Costs' are calculated using your existing unit rate (the pence per kilowatt hour used) and the daily standing charge (if applicable)."

I'm on smart meters, although the impression I have from this thread is that the web site data would come from the billing system of the energy supplier (rather than their meter reading system).

I tried

Someone sick and tired of having extremely cold floors during winter?

#Paul

I don't understand what you mean by this or why it is relevant to the Which? web site.

All the comparison sites get the data from the same clearing houses (one for gas[1], one for electric[2]). How they look up or present that data may vary. For example, Which refuses to progress if it thinks the address is a business address.

It doesn't seem to work for every address - it may be that smart meters don't report data via the clearing houses, or some other reason. Maybe one comparison site is better at querying data from more sources than another?

Theo

Joking aside, when I got to doing heat loss calculations it was quite surprised to work out how effective 3 meters of earth between the centre of a house and the outside actually affected heat loss. The far worse situation is a raised ventilated floor.. If you can, those really are worth insulating.

Also, it is amazing how much nicer 18°C with UFH feels as against 20°C with radiators.

And that also saves a bit I guess.

Certainly if one has a suspended wooden floor, ripping it up, insulating it and laying hot water pipes over the insulation is well worth considering

Quality underlay and carpet would be a lot cheaper, and be aesthetically pleasing.

For similar reasons I've looked at the EPC for a terrace house with gas heaters but not CH. Expiry 2034, solar water heating and 2.5kWp solar panels at the bottom, longer payback presumably because it is further North. Does also suggest a condensing boiler rather than ASHP or storage heaters.

Sheepskin slippers are cheap.

How much consideration probably comes down to how disruptive this is if you are not already planning a a complete carpet replacement

In my case:- Removing furniture from a room Removing fitted carpets Removing a 11mm thick underlay which is in the main stapled down, and in some places glued. Removing floor boards. In my experience in a 1908 house the floor boards were installed with long cut nails and the wood itself somewhat dried out. There is a 50:50 chance that when removing the boards that they would split along the grain. In many cases a split could be glued and clamped together and the board reused but in the past I've had to go to a proper wood yard and have thicker and wider timber cut down to size to match existing floor boards.

With a suspended ventilated floor how much insulation would be needed for UFH. Wouldn't the insulation have to be both under the floor boards but under the joists to prevent cold bridging?

Yes. If cold pridging is that impoartnt to you.

More realistically you lift the floor boards and slam celotex between the joists, foil tape over and add another layer of celotex above the joists - a thin one - and then replace floor boards or refloor with flooring grade chip.

Or you could put insulation UNDER the joists, then insulation between, then UFH pipes above that. If you have decent underfloor access.

My floor boards fit underneath the skirting boards. The extra layer of celotext would lift them. So that the skirting boards would hav eto be re-fitted - oh - and all the doors would need the bottoms planed off.

Could you not just put 100mm celotex between the joists, under the floorboards, so you don't have to do any woodwork? What bad things might happen?

Do you mean that all the comparison sites have access to, and publish, the energy costs of every [or most] property in the country, like Which seems to? How and when did that happen?

Yes, although they aren't publishing it widely - they're just allowing people to query it if switching 'their' supply (and realistically there's no way to securely ID customers searching on a comparison site). It's part of the infrastructure enabling smooth switching of suppliers, connected to MPAN and other supply data:

It does overcome the problem of people not knowing their typical annual consumption and putting the monthly payments into the comparison sites. The monthly payment was usually not a true reflection of usage as at the end of the year the could be many £100s in credit, or in debt if no meter readings had been given.

Now its likely that there are going to be more tariff choices it's more important knowing your actual typical usage (and assuming that going forward it's going to be very similar) to get the best deal on a comparison site. For instance, if you are a very low user a tariff with high unit cost without a standing daily charge may be the best option. This may not come up as best if someone inputs their monthly over payment as it indicates they are a higher user of energy.

Lifting the floor by even 25mm would be a world of pain. I'd be inclined to leave it as is, and add some more insulation between the joists. Something I tried with limited success was stapling some netting to the bottom of the joists, then infilling with rockwool.

Well when I tried our road I couldn't find any data, just a request to enter my consumption and costs.

Not everyone has a smart meter yet!