[Bldg-sim] 2006 IECC vs. ASHRAE 90.1-2004

[Nick Caton]

I would add a nuance to your conclusion Chris:  ... "Therefore complying
with ASHRAE 90.1-2004 is one way of complying with IECC 2006."

 

The two publications do have their differences (notably with regard to
certain lighting controls and 90.1's space-by-space LPD table) that may
make one preferable over the other if and when you have the choice.  

 

Here are a few differences that are fresh in my mind:

-          A strict reading of IECC 2006 requires manual control in all
spaces, with exceptions to corridors and security concerns.  90.1-2004
however offers the flexibility to use just automatic controls (like a
ceiling occupancy sensor) in some spaces if manual control is not
desired.  

-          The two publications also diverge in regard to additional
controls required should you decide to have the interior lighting
automatically shut off via timeclock.

-          90.1-2004 has a lengthier list of situations where lighting
may be exempted when totaling the interior lighting power.  Some are
significant depending on your project (i.e. "Casino Gaming Areas")!

 

The two are "roughly equivalent" in the sense that they have roughly
equal degrees of stringency, but if the systems' designer is given the
choice the best answer would be to become familiar with both to ensure
you're using the most appropriate standard during design.  COMcheck may
be a useful tool mid-design to quickly generate two reports under the
two standards to identify some of the differences, though I would
caution that it may not pick up all the subtleties...

 

~Nick

 

NICK CATON, E.I.T.

PROJECT ENGINEER

25501 west valley parkway

olathe ks 66061

direct 913 344.0036

fax 913 345.0617

Check out our new web-site @ www.smithboucher.com 

 

________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Chris Baker
Sent: Wednesday, July 08, 2009 10:24 AM
To: Keith Swartz; Subject: Re: [Bldg-sim] 2006 IECC vs. ASHRAE 90.1-2004

 

IECC 2006's Section 501.1Scope states 

"...commercial buildings shall meet either the requirements of
ASHRAE/IESNA Standard 90.1, Energy Standard for Buildings Except for
Low-Rise Residential Buildings, or the requirements contained in this
chapter."

 

Therefore complying with ASHRAE 90.1-2004 is complying with IECC 2006.


 

Chris Baker, AIA, EIT, LEED(r) AP,

THE WEIDT GROUP(r)
 

5800 Baker Road
Minnetonka, MN 55345
T 952.938.1588
F 952.938.1480
twgi.com <http://twgi.com/> 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Keith
Swartz
Sent: Tuesday, July 07, 2009 4:02 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] 2006 IECC vs. ASHRAE 90.1-2004

Hello, all,

 

Does anyone know of a study that has compared the equivalency of the
2006 edition of the International Energy Conservation Code (IECC)
compared to ASHRAE Standard 90.1-2004? It seems to me that they are
roughly equivalent...The State of Wisconsin allows either one to show
compliance with its energy code. Is there something credible I can refer
to that states that they are essentially equivalent? An admittedly quick
search I did came up with only some lighting comparisons.

 

_____________________

Keith Swartz, P.E., LEED AP
Energy Engineer / Senior Project Manager
Energy Center of Wisconsin
455 Science Drive, Suite 200
Madison, WI 53711
Phone: 608.238.8276 x123
Fax: 608.238.0523
Email: kswartz at ecw.org
Web: www.ecw.org

Energy Center University
Your gateway to sustainable design training and online education
programs.
www.ecw.org/university/ <http://www.ecw.org/university/> 

 

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