[Equest-users] Floor Slab F-factor

[Jeremy Poling]

The inter-office debate is more on advising our architect on options for
slab insulation using the energy benefits of one option compared to
another.  The project having the debate is a large area low-height
building with some spaces similar to a warehouse, so from an envelope
perspective the critical envelope gain/loss surfaces are the Roof and
the Slab.  

 

We arrived at this question for eQuest since the other model used in
house is Trace and Trace uses F-Factor directly for slab-on-grade.  For
eQuest, since the guidance on converting F-Factor to U-Factor for use in
eQuest was written in 1998 and was based on DOE2.1E, does eQuest 3.64
still use the same methodology?  The question also goes back to a
comment much earlier in the archives on this being an area of eQuest
that should be added in a future revision of eQuest.

 

Thanks for the help!

 

JEREMY R. POLING, PE, LEED AP
Associate Vice President,

Senior Sustainability Analyst
Strategic Services
Site Solutions | Operations | Sustainability

EPSTEIN

Epstein is a firm believer in sustainability. We ask that you please
consider the environment before printing this e-mail.

 

From: Jonathan Smith [mailto:jsmith at csarchpc.com] 
Sent: Thursday, September 09, 2010 7:39 AM
To: Jeremy Poling; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Floor Slab F-factor

 

Jeremy,

What's the point of contention you're debating? 

I would begin with creating a eQuest wizard model simulation that is
representative of the slab-on-grade example(s) given in the article. 

Jonathan

 

From: Jeremy Poling [mailto:jpoling at epsteinglobal.com] 
Sent: Wednesday, September 08, 2010 6:58 PM
To: Jonathan Smith; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Floor Slab F-factor

 

I'm a little tardy joining this thread, but the original write-up was
from the Spring 1998 edition of the "Building Energy Simulation"
newsletter.  I am hoping someone can confirm that this is still the
correct method for the latest versions of eQuest and DOE2.2 to solve an
inter-office debate.  Thanks!

 

JEREMY R. POLING, PE, LEED AP
Associate Vice President,

Senior Sustainability Analyst
Strategic Services
Site Solutions | Operations | Sustainability

EPSTEIN

Epstein is a firm believer in sustainability. We ask that you please
consider the environment before printing this e-mail.

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
Jonathan Smith
Sent: Tuesday, June 08, 2010 10:19 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Floor Slab F-factor

 

All:

 

The document regarding eQuest perimeter slab heat calculations is
appended to the eQuest Training Workbook. See the link below. 

 

"Underground Surfaces" by Fred Winkelmann (LBNL)

 

http://doe2.com/download/equest/eQuestTrainingWorkbook.pdf

 

 

Jonathan R. Smith AIA LEED(r)AP

 

 

40 Beaver Street
Albany, New York 12207
p: 518.463.8068 x268
f: 518.463.8069 
www.csarchpc.com <http://www.csarchpc.com/> 

 

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