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Re: [EnergyPlus_Support] Window U-6.81 & SHGC - 0.25



Jeremiah,

I was under the impression that, according to the ASHRAE 90.1, if you choose to meet the baseline standard you can have the SHGC of the window met, regardless of the U-value of the window. Please correct me if I am wrong.

Niraj

On Sun, Jul 15, 2012 at 2:35 AM, CleanTech Analytics <jeremiah@xxxxxxxxxxxxxxxxxxxxxx> wrote:
 

The requirement is for the maximum, so you would still comply- yet you would loose points for your baseline being "too efficient"

I wonder what approaches others have taken to make their baseline be no more then required..?







Jeremiah D. Crossett
CleanTech Analytics

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On Sat, Jul 14, 2012 at 10:49 PM, aberalvi <aberalvi@xxxxxxxxx> wrote:
 

For the baseline, climate zone 1B in ASHRAE 90.1-2007 requires the vertical glazing max. U-value to be 6.81 W/m2.K and SHGC 0.25, whereas the requirement for skylight is U-11.24 W/m2.K and SHGC - 0.36.

I enquired with the main E+ support website and came to know that it's not possible to model windows with a U-value greater than about 6.

I would like to know if there's any workaround for modeling the baseline window with such a high U-value or whether the baseline window can be modeled with U-value of about 6 and still comply.

Thanks,

Aber





--
Niraj Poudel, Architectural Engineer.
PhD student, PDBE Program.
Clemson University, Clemson, SC.




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