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Old 30.01.2011, 18:41
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Re: heating: choosing

Ten years ago, I renovated our 80+ yr. old house (with no previous experience). All new insulation internally (alufoil plus fermocell downstairs and glass fibre upstairs and under roof), Did not need to change windows. External wall insulation may now be a better option.

Our heating is warmepumpe heat pump with a 90m borehole. We have radiators throughout (slightly larger ones, specially as an alternative to underfloor heating, when using heat pump).

This system is initially more expensive to install (air heat pump works out cheaper than underground, though), but we were quoted that after about 10yrs. we should be quids in, due to no on-going fuel bills. Only electric, which is dual tariff, anyway.
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Old 30.01.2011, 19:16
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Re: heating: choosing

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Hmm, having looked into this quite a bit during our renovation planning, I'd say it depends! For a well-insulated, new build with underfloor heating I would agree. However, changing the heating system on an old property with wall radiators and poor insulation is not the same thing. There are companies around who are prepared to do this, without any proper thermal analysis of a property. I know, because I have quotes. However, I also now know the thermal properties of our walls, and to do this without insulating them properly (along with roof and changing windows) would have been a great way of using lots of electricity and spending lots of money to heat the garden. Indeed, some Austrian report concluded that the prospect of lots of people changing their heating systems on old properties to heat pumps is a potential environmental catastrophe.
We has one of those environmental analyses of our house in Vaud where a specialist comes in and checks out how you can make it more efficient. Our house was built in '87 and they basically said, "you've got what you got". You can't really "fix" these houses. In general these houses are average on that ABCD scale thing and that's the way they will stay. It's not cost effective to change things drastically.

We can do a few things to help, including insulating the ceiling of the "bunker" as it somehow makes the floor above it really cold, and putting a stove in/closing off the fire place. But that's about it. You won't be able to squeeze any more saving/conservation out of this type of house.

It's really not THAT expensive to run. It's quite warm in the winter and we've never needed A/C. It is oil burner/under floor heated. I'd have liked it to be "better" environmentally. But what's done is done. Sometimes you just can't turn a frog into a prince.
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Old 30.01.2011, 20:23
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Re: heating: choosing

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We has one of those environmental analyses of our house in Vaud where a specialist comes in and checks out how you can make it more efficient. Our house was built in '87 and they basically said, "you've got what you got". You can't really "fix" these houses. In general these houses are average on that ABCD scale thing and that's the way they will stay. It's not cost effective to change things drastically.
In contrast, our house is 1950. Walls are cement brick with no insulation at all, roof only has some minimal insulation (and no "sous-couverture" or waterproofing layer), windows are original with no seals, door leaks air too. Big differences can be made - of course at big cost...
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Old 31.01.2011, 09:51
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Re: heating: choosing

I understand there is government is concerned about the cost of gas and that steps are being taken to bring the cost down!
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