Re: [Phys-l] Insulation R-value

[Bernard Cleyet <bernardcleyet@redshift.com>]

Yes, like diopters, etc. for the same reason?

bc

Folkerts, Timothy J wrote:

> There are lots of good references for the definition of R values.
> According to Serway or Cutnell & Johnson (and I'm sure just about every
> other general physics book), 
>
> R = L/k
>
> And has units
>
> (ft^2 F hr) / BTU
>
> One advantage is that R values can be added, so if you add more
> insulation to your house, you can find the total R by simple addition.
>
>
> Tim Folkerts
>  

cut