[Equest-users] Section 179D Question

Steve Jacobs sjacobseng at gmail.com
Fri Apr 25 08:37:51 PDT 2014

I've used this approach in the past. Appendix G requires the schedules 
to be the same, and where no cooling systems exist you need to model it 
the same as the proposed. The NREL guidelines say you can use the " 
[schedule of the] taxpayer’s building if they are known (see Section 
3.6)." If a building has no cooling setpoint it is not unreasonable to 
interpret a no cooling setpoint as a high cooling setpoint. A large 
heated warehouse will have most its energy use in fans, lighting, and 
heat (depending on the heating setpoint). I don't think you would be 
gaming the system at all to have your model be consistent with the 
actual energy profile of the building.

- Steve

On 4/25/2014 8:45 AM, Daniel Knapp wrote:
> This requirement of adding cooling where it is not designed is an odd 
> one to be sure.  A possible workaround is to recognize that the 
> proposed building will have a cooling "setpoint" that is higher than 
> usual and to model the proposed and baseline cooling systems with an 
> equally high cooling setpoint.
> Dan
>> Sent from my phone
> On Apr 25, 2014, at 10:32 AM, Steve Jacobs <sjacobseng at gmail.com 
> <mailto:sjacobseng at gmail.com>> wrote:
>> I'm not aware of anything says we can or can't use addendum to 
>> Appendix G. It is certainly frustrating not having anywhere to take 
>> questions. The inability for modelers to seek clarifications means 
>> that the community is probably taking a lot of different approaches 
>> to the incentive.
>> On 4/25/2014 6:56 AM, Busby, Aaron wrote:
>>> ASHRAE 90.1 has several addendums now that have added system types, 
>>> just for warehouse type spaces where they are heated only.  Look for 
>>> Addenda DN, system types 10 and 11.
>>> */Aaron Busby, PE,  LEED AP/*
>>> Tel: 770.563.1522
>>> Cell: 678.642.7549
>>> *From:*equest-users-bounces at lists.onebuilding.org 
>>> [mailto:equest-users-bounces at lists.onebuilding.org] *On Behalf Of 
>>> *Tom Mickley
>>> *Sent:* Friday, April 25, 2014 8:38 AM
>>> *To:* equest-users at lists.onebuilding.org
>>> *Subject:* [Equest-users] Section 179D Question
>>> Has anyone run a baseline building for a retrofit building to 
>>> qualify a business owner for the Section 179D tax deduction?  It 
>>> seems simple enough to model the existing building based on ASHRAE 
>>> 90.1 standards.  Has anyone found any potential “hiccups” along the 
>>> way that has prevented the up to $1.80/sq tax deduction aside from 
>>> the obvious of not meeting the energy upgrade percentage?
>>> Here’s my main concern.  I have a cabinet manufacturer customer who 
>>> has a 100,000sf metal building that is roughly 30% wood working or 
>>> manufacturing, 65% warehouse storage and 5% office space.  95% of 
>>> this facility is heated only.  Do I have to include cooling in the 
>>> baseline from ASHRAE 90.1 system 5 on appendix G, table G3.1.1.A?  
>>> The only upgrades we are proposing are to take out the air rotation 
>>> unit and radiant tube vacuum systems and a few other minor items.
>>> Any advice would help.  Thanks in advance.
>>> Thanks,
>>> Tom Mickley
>>> Mechanical Engineer CEM
>>> The K Company
>>> Cell 330-760-3994
>>> Office 330-773-5125
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