You don't get it, do you ... you cited *a specific paper*, not the
whole site. You've only started referring to the whole site when
people started pointing out the erroneous conclusions that you'd drawn
from your original citation.
How often, BTW, do you imagine that people thinking about a/c issues
in Florida refer to the material on insulation published by BRE?
julian (at) bellevue-barn (dot) org (dot) uk
Let me try this one more time: the executive summary of the paper you
cited does not support the conclusions that you claimed. If the body
of the paper contains different (and conflicting) information then it
is *bad* research, and neither the paper nor the summary are worth
reading. You cannot infer from modest claims about the effectiveness
of radiant materials in the attics of Florida homes with shingle roof
coverings that the same approach would be equally effective in
reducing the internal temperature of a typical UK house, with stone or
tile roof covering (which in many cases will not be directly exposed
in the roof void), in different climactic conditions.
As others have pointed out, the amount of *radiant* heat produced by
the underside of a typical roof in this country is negligible.
julian (at) bellevue-barn (dot) org (dot) uk
Our dining room faces due south and there's a large bay windo which lets all
the sun in. It's horrible.
The answer is to draw the curtains on the south side of the house. The rest
of the house isn't a problem.
We open windows of course to catch whatever breath of moving air there is.
But covering windows seems to be the most effective solution and costs
nothing. If you have curtains ... in the caravan we lower the venetian
Generally, I agree...but as for the TV...just bought a 14 inch (OK, not
big) with a standby *consumption* (OK, mostly heat) of 2.9 watts. Not
really a lirtle less than a few hundred...! Even multiplying for a
decent sized TV, I can't see it reaching ewven 50 watts.
Computer monitors...easy to switch off, a major power hig, and the bit
that actually wears out a decent amount when on, not to mention the
largest fire risk in a PC...turn that off always when not using. Easier
and quicker (and thus more likely to be done) than the PC itself. And of
course engage power saving on the PC but don't allow the hard disk to
Yes, very much the case here yesterday. North-east Kent coast, south
westerly wind...very hot! However, today it was the opposite. Noth
westerly wind, off the sea, cooler than inside...
Yup. Just bought a big blind for a big, bare window today! But it was
too hot to fit it....
Depends on what you mean by noisy... the mono block units are noisy as
in the noise of a fridge freezer combined with a large fan - i.e.
irritation if you are trying to watch TV or sleep - but not as loud as a
Some people find that the small "personal" evaporative coolers do work a
bit - the evaporation effect will cool the air they blow out at you a
little bit - and the amount of moisture they contribute to a room is
relatively small once it has a chance to diffuse within the room (they
only consume a cup of water a day). The larger "room sized" evaporative
coolers are on a hiding to nothing in our climate however.
This is correct.
Chances are it would help your bodies natural cooling mechanism to work
more effectively. There would also be a side effect benefit in that they
presumably include a fan to move air through them which would help keep
the air moving in the room a bit.
In scientific terms however the de-humidifier is likely to raise the
room temperature by an amount equal to its power dissipation. This will
offset or even counteract the benefits.
They can claim to reduce the temperature since if you measure the air
output temp it will be colder since you have extracted some heat from it
to help vaporise the water. Alas its a bit like wind chill - the
thermometer does not tell the whole story!
All the usual things... insulation, increasing shade - plants, trees,
creepers etc. Reducing solar radiation absorbtion with blinds or solar
window film, forced air ventilation (fans etc). Turning off heat sources.
You can get portable split units - you hang the condenser outside the
window and its connected to the air handler inside via an "umbilical".
Not that cheap mind:
NOT a good idea if you value your property. Depends on the tree of course,
but never plant any too close to the house. Your foundations are valuable.
You can do yourself considerably more financial harm than you would ever
expend air-conditioning the entire house, the garage, the garden shed, the
Wendy House and the dog kennel.
I've only just caught up with this thread because on Friday we went off and
only got back last night.
We had the best two night's sleep - and days working too - we've had for
weeks, despite sleeping on a hard earth floor.
We were at Bede's World, Jarrow (I can thoroughly recommend it) and living
in a Dark Age long house.
The floor, as I said, is beaten earth. There were two ill fitting doors on
the long walls, almost opposite each other.
Two unglazed and high windows could be shuttered but we didn't.
The roof was thickly thatched and overhanging, the ceiling high.
The building was timber framed, the infill was thick daub.
It was cool, delightfully cool. Even during the day when I was working over
a charcoal firepot I was cooler than when I went into the sun. The hens
stayed in the building rather than go outside. Spouse worked outside but
under the shade of the eaves.
On Sunday morning we had very heavy rain and a long thunderstorm but I
reckon (didn't measure it) that the temperature indoors stayed more or less
the same as the rest of the time. The butter didn't melt, the milk didn't
sour, the fruit and vegetables didn't wilt, we didn't sweat.
We were sorry to come home.
Au contraire, ventilation wont bring a house's temp below the outdoor
temp. The keys are insulated roof plus earth floor. The earth floor is
a constant source of damp, and as this damp evaporates it cools. Same
principle as an evaporative cooler, only big.
In the winter tho, it'll be damper and colder.
Overhanging roof will help as well, and a hgh ceiling with ventilation
at the top means the hottest stratum of air escapes. Be grim in winter
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