[Equest-users] Existing Building, LEED NC

Ritwik Kakati rkakati at dagherengineering.com
Thu Aug 2 13:00:44 PDT 2012


Jeremiah,

 

We recently submitted an energy model for the renovation of an existing
building to USGBC (for NC 2009), and although the first round of
comments came back and my model is still not perfect yet, I can answer
what I did to your questions 2, 3 & 4:

 

2. Did not rotate the baseline and take averages. Only submitted the
baseline for actual orientation.

3. Baseline constructions were existing conditions before the building
was renovated.

4. HVAC system was based on Appendix G of 90.1, not the current/existing
system in the building. 

 

For all the above, USGBC so far has not raised any comments/objections
for my model, so I am hoping I am correct.

 

Hope this helps.

 

Thanks,

 

Ritwik Kakati, LEED Green Associate

Design Engineer

DAGHER ENGINEERING, PLLC

29 Broadway, New York, NY 10006

T. 212.480.2591 x140

F. 212.480.2654

rkakati at dagherengineering.com

www.dagherengineering.com

 

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From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of
CleanTech Analytics
Sent: Thursday, August 02, 2012 3:16 PM
To: bldg-sim at lists.onebuilding.org; EnergyPlus_Support at yahoogroups.com;
equest-users at lists.onebuilding.org
Subject: [Equest-users] Existing Building, LEED NC

 

Good day to all..

 

Working on modeling an existing building per 90.1 for LEED certification
and can not find clear answers in the standard or users guide- and
seeking of the advise of the Bidg-Sim community- 

The building is basically a shell- the 6 inch tilt up concrete walls and
concrete floor are the only things remaining un-changed. The building is
installing new HVAC systems, a new roof, a new lighting systems, new
skylights, new doors, new windows and insulating the existing walls. The
space is 35,000 square feet, and beside another building. The building
owners bought out their former neighbor and are expanding into their
space, the space shares a wall with their current space. 

 

1.	Adiabatic wall- Should it be Modeled with an adiabatic wall
separating the "two" buildings (that are actually one building with a
separating wall and separate address), or should the "other building"
not seeking LEED certification be included in the model?
2.	Rotated average baseline- This is an existing building and
orientation is set, so is this procedure still necessary or required by
90.1/LEED
3.	Baseline Constructions- Should the baseline reflect the walls as
they where before renovation (Un insulated tilt up concrete walls/R-5
roof deck?) or should it use the ASHRAE light weight constructions with
2007 insulation for the climate, or should it use the actual
constructions but add ASHRAE 2007 insulation?
4.	The HVAC system is a CAV, with convective natural gas heating
and and DX cooling- roof top units, the baseline system for this should
be system # 5 PVAV- or should the baseline HVAC system be what ever
system was in the building before the renovation?

 

An advanced thank you goes out to all that respond- 

 

 




Jeremiah D. Crossett

CleanTech Analytics

503-688-8951

www.cleantechanalytics.com <http://www.cleantechanalytics.com> 

 

 
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