On Tue, 08 Jun 2004 09:58:53 +0100, The Natural Philosopher
wrote:

Andy Hall wrote:


Then there is the conservatories which are heated
and burn fuel like crazy.


That's an overstatement. With double glazed low-E glass, the heat
loss is reduced substantially. With solar gain taken into account,
it isn't typically an order of magnitude more than a conventional room
of the same size.


Mmm. In winter it is tho. You can get a U value o about 0.2 out of a
well insulated wall: best glass I have seen is around 2.

OK, that doesn't take into account solar gains, true, but...


Well.... I calculated a heat requirement of about 4kW for mine, using
the standard CH heat loss methods.

It doesn't face south so is not in the direct sun for most of the day.

Even on the coldest day, I've never needed more than about 1-2kW to
feel comfortable, and averaged over the heating season, a lot less
than that.


You seem to advocate large glass areas as part of an eco house on the
argument of solar gain. At least be consistent.


People in glass houses...ahahaha



..andy

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