[Equest-users] U-Values

Alex Krickx akrickx at seriousmaterials.com
Wed Jun 9 09:02:09 PDT 2010


I would say that's pretty much to be expected. As R value decreases, more heat is lost though the envelope, so cooling loads decrease.

Typically when you increase R-value, the heating savings will outweigh the additional cooling cost - however I'm sure there are specific climates where this is not the case.


Alex Krickx
Building Energy Specialist
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1250 Elko Dr, Sunnyvale, CA 94089
(t) 408.541.8124

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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Peter Hillermann
Sent: Wednesday, June 09, 2010 8:48 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] U-Values

To All,

I seem to be having some issues with my baseline design and my first parametric run. (I am working in detail mode with INP file) When I make my baseline wall value R-13 and change it in my run to R-27 my heating (MBTU) load goes down by 4% however my electric rate (kWh) goes up 1%. I don't really understand because I thought both would have gone down. Am I doing something wrong?

Thanks,

PETER HILLERMANN

peterh at westallarchitects.com<mailto:peterh at westallarchitects.com>

westall
architects
3404 pierce drive
chamblee, georgia 30341

o 770.458.4113
f  770.458.5352
c 678.898.2936

westallarchitects.com
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