[Bldg-sim] Automatic Lighting Shutoff Mandatory Provision Question

[Nick Caton]

Jaigath,

 

Appendix G allows us to take credit for automatic controls in addition
to (beyond) what's required in 9.4.1 for minimum compliance.  One of the
options here is to have programmable (time-of-day) shutoff for interior
lighting circuits, and you can infer from between Table G3.1 and G3.2 of
Appendix G that baseline models are taken to feature only such timeclock
controls for automatic shutoff.  Further, it's taken that the lighting
scheduling being kept identical between the proposed and baseline
adequately reflects the minimum requirements, so you aren't supposed to
try to explicitly model the programmable shutoff.  

 

If you have occupancy sensors throughout a building which only requires
programmable shutoff, that's an example of having automatic controls
beyond what 9.4.1 requires - and you'd get to take 10% off your proposed
LPD in all spaces where such short-term shutoff isn't already required
(per following section 9.4.1.2).

 

Note Table G3.2 also has a corresponding distinction between building
smaller than and larger than 5,000ft2 - offering more credit for
buildings using a means of automatic shutoff where no such controls are
even minimally required.

 

~Nick

 

 

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: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Jaigath
Chandraprakash
Sent: Monday, October 04, 2010 9:01 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Automatic Lighting Shutoff Mandatory Provision
Question

 

Hello All,

 

I am confused on the mandatory provision 9.4.1.1 which states that
building larger than 5000 ft2 shall have automatic control device. Does
it mean that mid-rise and high rise building cannot claim for credit in
occupancy sensors shown in Table G3.2 because their GFA is more than
5000 ft2 and only small office can claim for this credit? I am sure I am
not interpreting this section correct since from what I read, other
modelers  are claiming for savings for buildings with more than 5000 ft2
area for occupancy sensors even if mandatory requirements states that
this is required which means baseline building will also have occupancy
sensors.

 

Can someone correct me on this? 

 

Thank you,

 

 

C. Jaigath 

 

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