[Bldg-sim] Occupany/Vacancy Sensors for Lighting Power & New Mass Energy Code

Eric Studer estuder at dmiinc.com
Fri May 1 04:20:20 PDT 2009


Vacancy sensors are a great idea and I would like to hear more about any
actual studies that quantify typical diversity reductions.  When performing
energy audits, we regularly encounter people who prefer low ambient light.
Standard occupancy sensors would be a real drag for these folks!

 

Here's a great source of lighting study white papers, including a good
analysis of the differences between ASHRAE 90.1-2007 and IECC 2006 w 07
Supplement:  http://www.aboutlightingcontrols.org/education/index.shtml.  

 

For Massachusetts readers, please be aware that the 7th edition of 780 CMR
that was released in September 2008 was superseded by a more restrictive
code in October 2008 that uses the previously mentioned standards.  This was
a recent surprise to us as well as others I've spoken with who need to be
aware of code minutiae.  Here's the link to the new code:
http://www.mass.gov/Eeops/docs/dps/inf/780_cmr_13.00_energy_efficiency.pdf
(bonus - the wonky formatting makes it an interesting read).  Interestingly,
the basic requirements of LEED EA Pr 1 appear to be required to get one's
Certificate of Occupancy (MA specific addendum to section 104.5).

 

Eric

 

Ph:   (781) 431-1100 ext 12
Fax:  (781) 431-1109

 

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From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Vishal Garg
Sent: Thursday, April 30, 2009 9:59 PM
To: Kevin Kyte
Cc: bldg-sim at lists.onebuilding.org; bldg-rate at lists.onebuilding.org
Subject: Re: [Bldg-sim] Occupany/Vacancy Sensors for Lighting Power

 

How is it saving more? Are you assuming that a person will enter the space
and will not switch the light ON?
- Vishal

On Thu, Apr 30, 2009 at 7:46 PM, Kevin Kyte <kkyte at robsonwoese.com> wrote:

Is anyone aware of a CIR or received approval for using vacancy lighting
sensors on a LEED project.  Meaning the sensor works like an occupancy
sensor but does not turn lights on until the user flips the switch.  Then
the lights automatically turn off after sensing no occupancy for a time.  If
so, what is the approved percentage deduction off of light power density.  I
was assuming an additional 10% over regular occupancy sensors but have been
told the savings could really be a lot higher than that.  Thanks.

 

Kevin

 

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