[Bldg-sim] EPACT Simulations Questions

[Andy hoover]

Hey Nick:

 

The baseline for building envelope is 90.1-2001.  Construct your building as
built to that standard and calculate usage.  Your 50% (or whatever
percentage) savings is calculated based upon energy usage reduction
generated beyond that baseline not your actual building. 

 

Thanks,

 

Andy 

 

Andy Hoover

Principal

The BEST Consultant, Inc.

Office: 678-200-7648

Fax:678-827-0574

Cell: 678-793-1159

 

www.thebestconsultant.com

 

 

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From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Nick Anderson
Sent: Tuesday, January 06, 2009 4:18 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] EPACT Simulations Questions

 

Building simulations for EPACT credits require that the building energy and
power costs be reduced by 50%.  The tax credit has been extended to 2013.

 

The energy and power cost savings must come from a 16-2/3% reduction in
three categories: Building envelope, HVAC and SHW, and Lighting.  There is a
guideline called  "Energy Savings Modeling and Inspection Guidelines for
Commercial Building Federal Tax Deductions" Second Edition, which is
Technical Report NREL/TP-550-40467, May 2007.  

 

In this guideline, they describe the technique on pages 3 and 4 to calculate
the costs and % cost reductions due to the Lighting, and HVAC/DHW
electricity use.  Nowhere does it describe how they want you to calculate
the cost and cost reductions due to the building envelope, despite the fact
that 16-2/3% of the energy savings are required to come from this category.

 

Does anybody know what to do for the building envelope and the EPACT
deduction?  

 

Has anyone seen a spreadsheet available already created to do the cost
allocations based on the outputs from a simulation program (in my case Trane
Trace 700)?  There are quite a few available for the simple "Interim
Lighting Rule" but none that I have found for the full model.

 

Also, in April 2008, an IRS Notice 2008-40 called "Amplification of Notice
2006-52" describes being allowed to change the portion of the savings for
the building envelope to 10% if the Lighting and HVAC/DHW savings are
increased to 20% each (for a total remaining at 50% energy and power cost
reduction).

 

Has anybody seen this used?  I have searched around for examples of EPACT
and all places still reference the 16-2/3% thresholds.

 

 

 

Nick Anderson

 

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