[Bldg-sim] LEED v4 ligthing devices
Nicholas Caton
ncaton at catonenergy.com
Tue Feb 24 12:50:28 PST 2015
Hi friends,
To confirm: I would describe a luminaire as the combination of lamp(s),
fixture, socket(s), drivers/ballasts. A lighting system is any combination
of luminaires + controls + power/wiring.
I personally read “manual” to essentially mean “user-initiated” control, as
opposed to “automatic” controls. 9.4.1.2 applies to both automatic and
manual controls. I think that’s in line with the discussion so far.
To explain by way of examples, assuming a basic conference room, here are
some simple solutions meeting the requirements of 9.4.1.2:
· Two identical luminaires in the space, each capable of providing
sufficient general illumination. Two ON/OFF toggle switches at the entry,
each controlling a separate fixture.
· Any number of fixtures on a continuous dimmer
· Any number of fixtures on a “stepped” (fixed levels of
illumination) dimmer with one setting resulting in a power draw between 30
and 70% of full load
· A conference room without manual controls (I realize I’m
stretching, bear with me), but rather illuminated via some combination of
fully automatic control including continuous daylight sensors, timer
control, and occupancy sensors
Each of these scenarios poses a means by which the user can manually
control or the control system can automatically have the lights consume
something between 30 and 70% of the full lighting load. Note this energy
standard doesn’t push too hard with respect to quality of light delivery,
but be mindful of the glossary entry for “lighting, general.”
As to parking, you might be in the clear with the system you’ve described.
Before focusing on the automatic reduction passage below, consider section
9.4.1.3 leads with allowances to exempt automatic controls for security
reasons or intended 24-hr operation (“comply with 9.4.1.1”, *and its
exceptions!*). That said, beyond the other requirements for
perimeter/ramp/entry controls and safety/security exemptions, my reading is
that the intent is to generally require automatic power reduction of at
least 30% via occupancy sensors.
The chosen wording “each fixture” implies a combination of luminaires and
controls more sophisticated (yes, expensive) than ON/OFF control, and that
wording is most likely intended to ensure the reduced lighting level is
uniform, and thereby maximally safe and adequate for the purposes of
avoiding liability for those enforcing this standard as code or referencing
it for design. If the engineer responsible for the lighting design is
comfortable making a written case to the appropriate authorities &
concerned parties (in this instance, inclusive of your LEED reviewers) that
an alternate energy reduction approach is sufficiently safe in the reduced
state and otherwise is in keeping with the requirements for automatic power
reduction, then including such supporting documentation alongside your
other model documentation *ought* to be sufficient.
… But that’s just my opinion. Another correct answer would be to design to
the applicable energy standard from the start ;).
Another correct answer is nobody may be looking as hard at these minutiae
as we are, and long email discussions won’t change that reality... such is
the curse of being passionate about your job!
I hope that’s helpful!
~Nick
*NICK CATON, P.E.*
*Owner*
*Caton Energy Consulting*
1150 N. 192nd St., #4-202
Shoreline, WA 98133
office: 785.410.3317
www.catonenergy.com
*From:* Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] *On Behalf
Of *David GARCIA SANCHEZ
*Sent:* Tuesday, February 24, 2015 2:53 AM
*To:* Julien Marrec
*Cc:* bldg-sim at lists.onebuilding.org
*Subject:* Re: [Bldg-sim] LEED v4 ligthing devices
This mandatory provision seems to be a little tricky. A new question came
to my mind.
For example, in the case of meeting rooms (In my project I have most of my
meetings rooms in the basement). This means that I need to have a control
device ON/middle/OFF in those space who doesn’t have any window or natural
daylight.
But,…. Since we doesn’t have daylighting entering into the space… the
“medium” position will be never used… it doesn’t have any sense. The
meeting rooms spaces will be even Off or ON….
Thanks in advance for your answers,
Best,
David GARCIA-SANCHEZ
*[image: cid:image001.png at 01CD52C2.E1AE1DF0]*
David GARCIA-SANCHEZ
*green**affair*
Tel. +33 (0)1 46 03 22 66
Mobile +33 (0)6 78 15 08 09
130-136 rue de Silly - CS 90071 – 92773 Boulogne-Billancourt Cedex
*www.greenaffair.com <http://www.greenaffair.com/>*
*De :* David GARCIA SANCHEZ
*Envoyé :* Tuesday, February 24, 2015 11:41 AM
*À :* 'Julien Marrec'
*Cc :* bldg-sim at lists.onebuilding.org
*Objet :* RE: [Bldg-sim] LEED v4 ligthing devices
Thanks for your answer,
I didn’t saw the definition of « luminaire » in the standard before, since
it state that it consist of a lamp or *lamps together *I suppose that at
the moment that the reduction of 30% is achieved and my group of lamps is
less than 3 600 ft2 I’m ok J
Thanks again for your answer!
Mr. Koyue Tagne tell me to send a kiss to you,
Best,
DGS
*[image: cid:image001.png at 01CD52C2.E1AE1DF0]*
David GARCIA-SANCHEZ
*green**affair*
Tel. +33 (0)1 46 03 22 66
Mobile +33 (0)6 78 15 08 09
130-136 rue de Silly - CS 90071 – 92773 Boulogne-Billancourt Cedex
*www.greenaffair.com <http://www.greenaffair.com/>*
*De :* Julien Marrec [mailto:julien.marrec at gmail.com
<julien.marrec at gmail.com>]
*Envoyé :* Tuesday, February 24, 2015 11:22 AM
*À :* David GARCIA SANCHEZ
*Objet :* Re: [Bldg-sim] LEED v4 ligthing devices
Vu !
C'est bon pour le 9.4.1.2. What it says it that you have at least one
control device (not 24 hrs operation...) and that you need one control step
between 30% and 70% (Off/mid/on). Also, IF you happen to have manual
devices, they need to be readily accessible.
In your case, the primary control is daylight/occupancy dimming, and you do
have more than one control step between 30% and 70%, so I think you're good.
As far as the parking garage goes, not sure.
--
Julien Marrec, EBCP, BPI MFBA
Energy&Sustainability Engineer
T: +33 6 95 14 42 13
LinkedIn (en) : www.linkedin.com/in/julienmarrec
LinkedIn (fr) : www.linkedin.com/in/julienmarrec/fr
2015-02-24 10:14 GMT+01:00 David GARCIA SANCHEZ <
dgarciasanchez at greenaffair.com>:
Hi all,
Hope you are doing well,
I have two specific questions concerning the interpretation of ASHRAE
standard 90.1-2010 for LEED v4, mandatory provisions for lighting and I
hope you can help me. (my project is a classic LEED CS office building in
the center of Paris)
The first one is concerning space control. The standard states that each
*manual* devices should have the a) requirement (see below). So my doubt is
concerning the “manual” word. It seems that it should be a control step
with the “manual interrupters” to three levels (on/middle/off) instead of
the classic two levels interruptors? (on/off)? Because, specifically in my
project we have natural light dimming/occupant sensor and BMS so I didn’t
see the interest of put three levels interrupters if the light will be
graded with natural light after the lighting device turn on. I’m obliged
then to put three levels interrupters in all my project even that I have
dimming/occupancy sensors and BMS?
The second question is concerning Parking garage lighting control (point
9.4.1.3.b. of Ashrae standard 90.1-2010)
In our project we have 1/3 2/3 rule for parking areas. It means that all
time at least 1/3 of total luminaires are always ON (the rest are off)
unless an occupant is detected within the area, in that case the rest 2/3
of luminaires turns ON. Which is stated in the point b of previous
mandatory provisions is that *“each”* luminaire power should be reduced.
Which is impossible with previous system that is very common in France for
security reasons. So I need to change my system conception or I can do
something? Or I misunderstood the point?
Thanks in advance for all your answers,
Regards,
*[image: cid:image001.png at 01CD52C2.E1AE1DF0]*
David GARCIA-SANCHEZ
*green**affair*
Tel. +33 (0)1 46 03 22 66
Mobile +33 (0)6 78 15 08 09
130-136 rue de Silly - CS 90071 – 92773 Boulogne-Billancourt Cedex
*www.greenaffair.com <http://www.greenaffair.com/> *
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