[Equest-users] U value-space heating

Byron Burns B.Burns at ha-inc.com
Sun Jun 15 06:14:59 PDT 2014


Hello Tugce,

It really depends on the building you are modeling and the climate.  Is the building dominated by internal loads?  The higher the internal loads, the less affect envelope improvements will have on the energy use of the building.  What are the heating degree days for the climate you are modeling?

Review the LS-C and LS-B report to evaluate the change in heat flux through the building components you are evaluating.  This should indicate whether the model is set up correctly, rather than looking at the overall heating load.

Byron D. Burns, EIT, BEMP
Energy Engineer, Building Sciences Studio

H&A Architects & Engineers | www.ha-inc.com<http://www.ha-inc.com>
d: (804) 420-1622 p: (804) 285-4171 f: (804) 217-8520

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of tugçe ake
Sent: Sunday, June 15, 2014 9:02 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] U value-space heating

Dear All,

I modeled a building and I want to make a comparison with different materials, which have different U values, for external wall. But when I change U value, space heating load does not change as expected. For example, I tried to make a comparison between two materials, their U values are 1,2W/m2K and 0,2W/m2K, and the result shows that space heating load is reduced by only 8%.
Is this result rational? or Is there something wrong?
Thanks


Tugce
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