[Equest-users] Window Comparison

[David Eldridge]

Take a peek at the LS-C report in the *.sim output file, this may help give
you an idea what percentage of the building heating and cooling loads are
due to the windows.



David

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David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, HBDP

*Grumman/Butkus Associates*

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*From:* equest-users-bounces at lists.onebuilding.org [mailto:
equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Brett M. West
*Sent:* Monday, November 08, 2010 3:38 PM
*To:* equest-users at lists.onebuilding.org
*Subject:* [Equest-users] Window Comparison



I am doing a model for a two story office building with the windows making
up approximately 30% of the building’s exterior. My goal is to find what
type of energy savings the owner can expect by replacing all the existing
single pane windows with double pane, low e windows. When I change the
window type to a double pane low-e window I am seeing savings that are very
small, around 3% of the total building kWh.



For reference, the buildings HVAC system consists of two air handlers (one
per floor) ducted to a VAV system with hot water reheat.



Has anyone else tried to do this type of comparison and if so what type of
energy savings did you find? I have attached my model pd2 and inp files for
reference. Thanks in advance for any information.





Brett West



RMF Engineering, Inc**

Ph: 843.971.9639

bwest at rmf.com
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