[USMA:49473] Re: Btu

[mechtly]

R Value if *defined* by IP units, not by SI units, except second.

---- Original message ----
>Date: Tue, 11 Jan 2011 08:56:47 +1100
>From: Pat Naughtin <pat.naugh...@metricationmatters.com>  
>Subject: [USMA:49467] Re: Btu  
>To: "U.S. Metric Association" <usma@colostate.edu>
>
>   Dear Robert,
> ...
    After that I am in doubt. Is the "R value" really
>   a metric value?
>...