[sclug] Wood vs GHC

Bob Dunlop bob.dunlop at xyzzy.org.uk
Wed May 22 14:39:52 UTC 2013

On Wed, May 22 at 10:25, John Stumbles wrote:
> On 17/05/13 09:33, Bob Dunlop wrote:
> > a good level of passive solar heating, since this means I'm unlikely to
> > need to run the central heating for room heating I would be better to
> > provide the hot water demand by running the immersion heater than the
> > boiler.
> circa 12p/kWh peak rate electricity versus c. 3p for gas?
> How inefficient is your CH system?!

Heating oil is about 7p/kWh and heating water to indirectly heat more
water in a tank 50 feet away can't be efficient.  Then the boiler is
over 20 years old and won't be as efficient as a modern one even if
serviced regularly.

We're begining to burn out fuel pumps regularly since they removed the
sulphar lubrication from the oil, and I'm told that modern replacement
condensing oil boilers only have a usable life of about five years.

Just hoping to hold it together long enough for heatpumps of some sort
to become viable.

Then again the quote for getting mains gas was something like 15 grand.

        Bob Dunlop

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