[Equest-users] Radiant ceilings

[Paul Erickson]

Adam,

They cannot be modeled directly, nor credibly well indirectly.  TRNSYS, EnergyPlus, IES and a few others are more appropriate tools for this.  If you choose to not model the rest of the building in these programs, you could potentially (depending on system configuration) have the two software "communicate" loads/performance from one to another.

Regards,
Paul

Paul Erickson  LEED(r) AP
SR. Sustainable Design COnsultant



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

P: 608.236.1112 | F: 608.238.2614
perickson at aeieng.com<mailto:perickson at aeieng.com>  |  www.aeieng.com<http://www.aeieng.com/>



From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Adam M. McMillen
Sent: Wednesday, July 28, 2010 7:53 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Radiant ceilings

Does anyone know if equest can model radiant ceilings (for heating and cooling)?

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Adam McMillen, LEED AP BD+C
Mechanical Engineer | mcmillenam at kjww.com<mailto:mcmillenam at kjww.com>

1100 Warrenville Road, Suite 400W | Naperville, Illinois 60563
630.527.2320 | Direct: 630.753.8561 | Fax: 630.527.2321
www.kjww.com<http://www.kjww.com/>

[cid:image002.jpg at 01CB2E2D.0DF24BA0]
"One of the Best AEC Firms to Work For"
Building Design + Construction, March 2008


From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Dakota Kelley
Sent: Tuesday, July 27, 2010 3:52 PM
To: Nick Caton; M. Shields; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Unmet Hours

I put one small FYI at the end of Nick's #3 below, in all caps for the sake of the plain text archives...

Dakota

From: Nick Caton [mailto:ncaton at smithboucher.com]
Sent: Tuesday, July 27, 2010 2:33 PM
To: M. Shields; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Unmet Hours

Michael,

90.1's passage (G3.1.2.2) regarding unmet hours requirements is something I had to re-read many times to get my head fully wrapped around it... Here's my current interpretation:


1.       You need to have 300 or fewer hours in each model.

2.       The proposed is not allowed to perform worse than the baseline by more than 50 unmet hours.  If it does you have to make the baseline "underperform" so they're within 50 of each other.

3.       The baseline is permitted to perform worse than the proposed (by any degree) as long as it's still 300 or fewer unmet hours. THIS IS MY INTERPRETATION AS WELL, BUT IT IS WORTH MENTIONING THAT MORE THAN ONE LEED REVIEWER HAS INDICATED THE OPPOSITE.  FOR EXAMPLE, I WAS TOLD I WAS OUT OF COMPLIANCE WHEN THE BASELINE HAD 65 UNMET COOLING HOURS AND THE PROPOSED HAD 5 UNMET COOLING HOURS.  DO YOU ARGUE, OR JUST REDUCE THE BASELINE HOURS?  IT PENALIZES THE BASELINE TO REDUCE THOSE HOURS, SO I WENT AHEAD AND DID WHAT I WAS TOLD.

You haven't said whether you're talking about your baseline or proposed model, but the above points should guide you as to whether you need to make an adjustment.  Refer to G3.1.2.2 for review and further info.

~Nick

[cid:image003.jpg at 01CB2E2D.0DF24BA0]

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: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of M. Shields
Sent: Tuesday, July 27, 2010 1:19 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Unmet Hours

Hi All,

I am working on filing out the LEED paperwork for submittal and for unmet hours I am wondering does the reviewer want the total unmet load hours for the building, or an average per zone?  My building has about 100 zones, most of which have 0 unmet hours, but I have one zone which has significant (more than 50) unmet hours.  Does this mean my model exceeds the requirement that the difference between the baseline and the proposed be less than 50 hours?

Thanks for any advice.

Michael Shields
Phone: 803-493-4507
Fax: 803-548-2511
Email: mshields at fstrategies.com<mailto:mshields at fstrategies.com>


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