[Equest-users] C Factor and F Factor

[James Hansen]

If you look at Table A6.3, you'll see that an F-factor of 0.73
corresponds to an unheated slab with no insulation.  So maybe you don't
have to change anything?

 

Isn't the idea for the C-factor that you use Tables A3.1B and C to
determine the corresponding U-value based on the construction and
C-factor requirements?  

 

I could be doing this all wrong, but that's what I usually do.  

 

GHT Limited
James Hansen, PE, LEED AP

Senior Associate

1010 N. Glebe Rd, Suite 200

Arlington, VA  22201-4749

703-338-5754 (Cell)

703-243-1200 (Office)

703-276-1376 (Fax)

www.ghtltd.com <http://www.ghtltd.com/> 

 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Justin
Chin
Sent: Thursday, March 10, 2011 10:35 AM
To: Arpan Bakshi
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] C Factor and F Factor

 

Arpan,

   I know I am suppose to change my F Factor to .73 and C Factor - 1.14
for non residential building in climate zone 4A.  I am having issues
with actually changing the properties of the materials to reflect this.
All of my underground walls wont allow me to input any values.

On Thu, Mar 10, 2011 at 10:30 AM, Arpan Bakshi <arpanbakshi at gmail.com>
wrote:

Justin, did you check 90.1 Appendix A?

 

On Thu, Mar 10, 2011 at 10:24 AM, Justin Chin <jchin.bu at gmail.com>
wrote:

	Hello all,
	
	  I received USGBC comments for my model asking to input
C-Factor values and F-Factor values for my underground walls and slab on
grade floors.  However, when I went back to my model to adjust the
properties of the underground walls and the floors, I cannot change
those fields.  Any suggestions?
	
	Thanks
	Justin

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-- 

 

Arpan Bakshi/YRG 

646 704 2880

 

 

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