[Bldg-sim] Leed eac1 Plug loads

David Eldridge DEldridge at grummanbutkus.com
Thu Feb 13 13:23:42 PST 2014


At lower than 25% levels GBCI likely will ask for an itemized list to show that you've considered all of the potential contributors. In addition to Fred's list, add elevators if these aren't separately modeled. Water coolers. Anything that shows up with a connection in the electrical plans.

David



David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP
Grumman/Butkus Associates



From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Fred Betz
Sent: Thursday, February 13, 2014 3:17 PM
To: Chris Yates; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Leed eac1 Plug loads

Chris,

The plug loads are the plug loads. The 25% is just a guidance value from USGBC/GBCI. I've been over and under this level numerous times without a problem.

If you've used the load estimated by the mechanical and/or electrical engineers and apply an appropriate schedule then it should be good enough.

When you're under the 25% threshold a text box will appear for you to explain why. Just state that you've modeled the plug loads as designed.

10 W/m2 sounds a little low for an office. If the owner has made a commitment to use Energy Star devices or laptops for everyone, then 10 W/m2 is plausible. Don't forget to include other equipment like servers/IT equipment, copiers and kitchen equipment (microwave, coffee maker, etc.)


Fred


Fred Betz  PhD., LEED AP (r)BD&C
Senior Sustainable
Systems Analyst



AEI | AFFILIATED ENGINEERS, INC.
5802 Research Park Blvd. | Madison, WI  53719

P: 608.236.1175 | F: 608.238.2614
fbetz at aeieng.com<mailto:fbetz at aeieng.com>  |  www.aeieng.com<http://www.aeieng.com/>



From: Chris Yates [mailto:chris.malcolm.yates at gmail.com]
Sent: Thursday, February 13, 2014 2:28 PM
To: bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>
Subject: [Bldg-sim] Leed eac1 Plug loads


Dear bldg sim'rs

I'm a little concerned that the plug loads I've modelled in my offices are low and could leed to some unwanted usgbc comments.

I'm meeting the 25% requirement but the peak load in the offices is 10w/m2. Whilst i dont think this is overly optimistic the reviewers may think otherwise. Has anybody had experience of plug loads being queried in detail?

Many thanks

Chris

Sent from my Android device. Please excuse typos, etc.
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