Dear Robert,

Thanks for the list.

Are all the old measuring words used by ASHRAE really metric measuring words in 
disguise. For example, I think it is likely that, for the first three, they are 
using: the metric foot of 1959; the metric inch of 1959; the metric square 
footage of 1959?

After that I am in doubt. Is the "R value" really a metric value? I the metric 
kBtu really a simple multiple of a kilojoule? And so on for the rest.

Cheers,

Pat Naughtin
Geelong, Australia

On 2011/01/11, at 08:30 , Robert H. Bushnell wrote:

>                                       2011 Jan 10
> Some time ago somebody asked "who needs Btu?"
> 
> One answer is ASHRAE for it's publication High Performance Buildings.
> 
> I asked them to use SI.  They said no.  Their readers are builders
> and maintenance people who want to see inch-pound units.
> The units used are:
>               ft
>               in
>               square footage
>               R value
>               kBtu
>               kBtu/ft^2
>               heating degree days
>               degree F
>               therm
>               gallon
>               kWh
>               gallon
>               W/ft^2
>               MMBtu
>               cfm
>               cfm/ft^2
>               acre
>               lb
>               kcf
>               lb
>               mile
>               mpg
>               ton (cooling)
> 
> In the winter 2011 issue for the two plants in Ohio Honda lists
> GJ first with kBtu in paren  as 5.13 GJ (4.872 kBtu).
> 
> 
> ASHRAE Journal allows some SI.
> 
>                               Robert Bushnell
> 

Pat Naughtin LCAMS
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