CH design and radiators...

Jan 31, 2015 78 Replies

If your house can drop to 12C (I'm assuming from 20C) while you work, you need a lot more insulation!

And.... you're not wasting as much as you think, as when you come home it's on a lot to warm the house back up again.

And.... I'd be wondering if it's bad for the house to be heating and cooling all the time. Ever noticed wood warps in the cold/damp?

That drop is from about 20C at midnight, through to 6pm the following day. Maybe a 30 minute blast before I get up. About a .5C drop/hour - is that a lot?

And I'd suggest we could all use more insulation, but for diminishing returns . . .

I think I'm wasting exactly as much as I would :-)

It does take a lot - about 50p an hour as it hauls itself up to 18-20C. Maybe I should do some comparisons, but I did read up on this a while ago, and was convinced the house-on-simmer method was wasteful.

No problems of that kind that I've noticed. Bit of cold bridging (or something, not sure) in the front bay. I'm sure the roof and floor timbers experience much wider temperature swings.

More than my house. If I heat it to 20C then leave the heating off when it's 0C outside, it takes about 2 days to drop to 12C.

Indeed, insulation can be expensive.

I read somewhere that you save a bit, bit not much, so I don't bother.

I wouldn't like damp anywhere.

That sounds impressive. It'd take some doing here - Victorian terrace with solid brick/stone walls and suspended timber floors.

Semidetached with a pensioner next door, heat comes into one of my external walls :-) In fact if I leave my heating off for a week and it's 0C outside, the house remains at 10C.

It's also a bungalow with high hedges and fences so the wind doesn't get to it much.

Ditto here, largish Victorian house, solid walls, single glazed (though quite a bit of secondary glazing) etc.

Has anyone invented triple glazing?

Has anyone invented triple glazing?

Has anyone invented triple glazing?

Yes. Friends of mine had triple glazing added. It was, I think, Swedish.

Yes.

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Have you not heard? A number of window specialists have been supplying it for many years.

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From your link: Next to a single glazed window, the internal surface temperature is arou= nd 1=B0C. Next to a double glazed window (2000 vintage), the surface temperature i= s around 11=B0C. Next to a modern, energy-efficient double glazed window, the surface tem= perature is 16=B0C. Next to a triple glazed window, with a centre-pane U value of just 0.65,= the temperature is 18=B0C.

I don't think that's worth it. Seems like modern doubles are almost as = good.

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8 Brits were injured last year in accidents involving out of control Sca= lextric cars.

Yes - people in other countries.

It surprises me it is not *readily* available here...

Perhaps it's a case of diminishing returns, it was in the link provided by the other poster.

A decade or more ago I was quoted for double glazing and then told I could have triple glazing instead for the same price.

It was all a rip-off but nevertheless a mainstream national window company was offering it.

I'm sure even a local company can get it for you.

I'm not so sure.

I ran a calculation on my house and the DG was so much worse than the even modestly insulated cavity walls that it would have made sense to have triple glazing in the front bays.

The frames are basically the same (clearly the glazing aperture is wider, I said "basically") and the frames are not cheap even before glass is added - in theory it should only add 50% to the cost of teh panels to make them TG and that's going to add quite a bit less than 50% to the whole unit cost - for tangible long terms gains.

Yes, but you're more likely to examples in see-through oven doors.

The performance of modern doubles will tend to fall with time though as the gas fill leaks out and moisture creeps in. Likewise modern K glass can be a mixed bag - thermally more efficient, but it lets less light in, and so you may find yourself turning the lights on sooner.

Not round here - I asked...

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