[BLDG-SIM] 90.1-2004 ASHRAE Basecase

Aulbach, John jaulbach at nexant.com
Mon Mar 5 15:01:28 PST 2007


ASHRAE 90.1-2004, page 7 - Definition of F-Factor (loss through
slab-on-grade floor), page 6 - Definition of C-Factor (loss through
underground wall). Note units are the same as U-Value. I believe you use
them for the same purpose as U-Factor, except your outside medium isn't
air, it is dirt.

________________________________

From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of Steve
Mignogna
Sent: Monday, March 05, 2007 2:37 PM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] 90.1-2004 ASHRAE Basecase


Hello,

I had a question regarding setting up a baseline model based on the
ASHRAE 90.1-2004 standard.  For the envelope requirements, the required
values for the "Slab on Grade Flrs" and "Below Grade Walls" are in terms
of "F-values" and "C-values" respectively.  Since eQuest only takes the
U or R values as inputs, I was wondering how these F and C values
corresponded to them.  Any help would be greatly appreciated. 

Regards,

-- 
Steve Mignogna
Atelier Ten 


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