[Greenbuilding] skepticism about mass wall values

[Topher]

On 4/24/2013 7:21 PM, Peter Kidd wrote:
> I think actually thermal diffusivity is the more relevant parameter.
> We are expecting to hit 5C (41F) for the first time since Halloween 
> tomorrow, I am not sure thermal mass is so wonderful buried in the 
> wall in this climate.
> There are several ways that HD Day is calculated. For Code in Canada 
> it's based on the mean daily temperature so I suppose that might be 
> seen as "hourly computed", but is it /always/ lower?

No, mean daily is explicitly/not /hourly computed as I was using that 
term.  It is always lower as long as there is at least one crossing of 
the HDD setpoint.  I don't know if that occurs for you northerners... :-)

Thank You Kindly,

Corwyn

-- 
Topher Belknap
Green Fret Consultin
Kermit didn't know the half of it...
http://www.GreenFret.com/
topher at greenfret.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/greenbuilding_lists.bioenergylists.org/attachments/20130425/04e46e1e/attachment.html>