In Canada, the R-factor was changed in the 1970s to the RSI- factor, using
the m^2·C°/W formula. The values were a lot lower than the imperial
R-factor. And as North Americans like bigger rather than smaller numbers
for just about everything, only the National Building Code refers to RSI.
People still carried on using R.
John F-L
----- Original Message -----
From: "Pierre Abbat" <p...@phma.optus.nu>
To: "U.S. Metric Association" <usma@colostate.edu>
Sent: Wednesday, January 27, 2010 5:53 AM
Subject: [USMA:46490] Re: Too entrenched to change
On Tuesday 26 January 2010 20:46:41 Bill Hooper wrote:
Clearly this can be converted to m^2·C°·s/J .
Furthermore, factor, s/J, is equal to 1/W so the R value can be
simplified
even further to m^2·C°/W.
And as 1 C° of temperature difference is the same as 1 K, it's a kelvin
square
meter per watt. That's still a mouthful. One tenth of a kelvin square
meter
per watt is called a tog, but I think the kelvin square meter per watt
itself
should have a short name, since the 0.1 factor can cause some order of
magnitude errors (as does the concurrent use of centimeters and
millimeters).
I've thought of calling it the coat; does anyone have a better name?
The clo (https://www.swarpa.net/pipermail/fictionary/2002/thread.html) is
another unit of thermal insulation (0.155 coat), which is not the same as
the
unit of R (0.176 coat). Anyone know where 0.155 came from? (For the R
value,
I asked the units program.)
Pierre
--
When a barnacle settles down, its brain disintegrates.
Já não percebe nada, já não percebe nada.
