[Equest-users] Slab Floors

John Forester jforester at dmiinc.com
Thu Feb 25 09:09:45 PST 2010


Hi Jason,

 

Take a look at the attached paper.  I believe this is what the wizard does
when creating slab on grade and underground floors.  The wizard creates
layers that make up an equivalent construction to account for the perimeter
heat loss.  When zones have different perimeter lengths, the equivalent
constructions and R-values are going to vary.  Someone please correct me if
I am wrong.

 

John

 

John T. Forester, LEED AP BD+C

Demand Management Institute

35 Walnut Street

Wellesley, MA 02481

Phone: 781 431 1100 x14

Fax: 781 431 1109

email: jforester at dmiinc.com

web: www.dmiinc.com

 

-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Robinet,
Jason
Sent: Thursday, February 25, 2010 10:53 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Slab Floors

 

Hello,

 

I have noticed that when entering detailed mode from the design wizard that
equest has put together the layers for underground floors.

 

I have selected concrete floor on ground with no insulation in the wizard.
What I have noticed is that Equest will produce layers using some custom
materials for this slab.  The material will be called something like "EL1
UFMat (G.NE1.U2.M1)".  this material will have some arbitrary R value.  it
seems that Equest will generate several different layers for different
spaces using different materials like this.  The materials will have
different arbitrary R values.

 

My question is what are these supposed to represent, and should they be left
there for accurate simulation? Also wondering why the R values are all
different.

 

 

 

Thank you,

 

Jason Robinet

Ameresco Canada

jrobinet at ameresco.com<mailto:jrobinet at ameresco.com>

 

 

 

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