by cephalotus » Thu 03 Mar 2011, 13:28:23
$this->bbcode_second_pass_quote('hope_full', '
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In an old house with radiators, you can't cut them off by zone or by room. It's all or nothing. My point is, there are tons of people like me, living in older homes and trying to decide between groceries and heat. It's an ugly spot to be in.
Oh. I didn't know that heating systems like this do exist outside of the former USSR

So what's your solution? Praying for cheap oil?
The house in my avater (location: Southern Germany, so quite cold during winter) needed roughly 3.300l of heating oil 15 years ago. It had double glaced windows and a bit of insulation.
1995 a small solar hot water system was installed: -200l oil/a (hot watre fpr 5 persons at that time)
1997 a mostly unheated "winter garden" was installed: -300l oil/a
2002: new windows with good insulation (u: 1,1W/K*m²): -300l oil/a
2004-2007 6cm insulation (better would have used thicker insulation) was added mostly on the Northern and Eastern side: -400l oil/a
2006: grid connected 5kW photovoltaic system was installed (no effect on oil use)
2008: new oil boiler that also uses condensing heat: -500l/a
Actual consumption is between 1500l/a and 1700l/a.
Except replacing the boiler none of those installations will pay the invest back in short times because of the lower oil consumption, but they will keep the cost in check and keep/increase the value of the house.
If oil gets really expensive (let's say 3-4x as expensive as today) the next steps would be
- installing a wood oven: ~ -500l/a ?
- reducing room temperature and less hot showers in winter: ~ -300l/a ?
The final plan for the years to come is to replace the solar hot water system with more photovoltaic and remove the oil tanks an make one huge thermal water storage system. The old PV system will not get any FIT after 2025, so the electricity is for "free" and can be used to to heat the hot water tank in case of excessive electricity.
This would not be enough during winter, but in Germany there now are many days during winter where wind energy is so plenty, that electricity is sold on the EEX for negative prices, so I hope taht someday we will get cheap consumer electricity prices in those times when the wind is blowing strong. The huge hot water storage tank than could last for 10-15 cold days.
All of this costs money.
If you do not have money your only option is to consume less (oil) by living at significantly lower temperatures.
PS: I assume that conservation is very "un-American". To me Americans seem to believe more in changing the type of fuel or even consume on credit than to use more efficient technology or -heaven forbid- reduce the demand.