HomeMy WebLinkAbout2012-05-09-ECC2-min
LexingtonEnergyConservationCommittee
Chair:JoeMusacchia
Secretary:PrabirMaulik
MeetingDate:May9,2012
Memberattendees:ChrisHaines,PaulChernick,PrabirMaulik,RogerBorghesani,ShawnNewell,
SteveKropper,JoeMusacchia
Otherattendees:BethZonis,PatGoddard
AmeetingoftheLexingtonEnergyConservationCommitteewasheldonMay9,2012,6:00pmto
7:30pmatthePublicServicesBuilding,BedfordSt.,room221.
TheAgendaandnotesforthemeetingare:
1)Approvalofpriormeetingminutes
2)UpdatefromDPW
1.Reminderof
Tuesday 15-May Anaerobic digester RFP meeting at the PXB from 7-8 pm
3)UpdatefromDPF
1. Recap of the 4/26 meeting of the PBC on the Estabrook Energy Model and design
components
2. Comments received from Thompson Engineering Company:
1. The classroom (and similar rooms) lighting design must meet the requirements of
the State Building Code, LEED for Schools and the NStar Advance Building
rebate program. While all three requirements are not completely identical, the
classroom lighting design must allow for the following:
1. Provide the teacher the ability to uniformly lower the lighting to at least
2. 50% from 100%.Provide “general classroom lighting levels”
3. Provide “AV presentation lighting levels” by darkening the front of the
room near the projector and lower the general classroom lighting by at
least 50%.
2. These design goals can be accomplished by one of two methods:
1. Switching – Linear pendent fixtures with two “super” T8 lamps in cross
section.
2. Dimming – Linear pendent fixtures with one T5 or T5HO lamp in cross
section.
3. Since the T5 or T5HO fixture has only one lamp in cross section, switching is not
an option. The fixture would not provide even lighting because every other lamp
in the fixture would be switched, this would create a dark area every 4 feet along
the fixture. Also lighting fixtures are not typically manufactured this way.
4. Cost issues: The dimming option requires dimming ballasts in all fixtures and
dimming ballasts are typically $50 to 100 more expensive than standard ballasts.
The estimated additional dimming ballast cost per room is between $250 and
$350. In addition, lighting fixtures using T5 and T5HO lamps are typically more
expensive (3% to 5%). There are 5 kindergarten rooms, 23 general classrooms
and 8 other classroom type rooms. The added cost to use dimmable T5 or
T5HO fixtures is approximately $10,000 to $20,000.
5. The dimmable T5 or T5HO lamps would be the prefer method, however the
added cost for this option must be evaluated against the total electrical
construction budget. Once the design team receives the DD estimate, we will be
able to determine if the budget will allow us to pursue the T5 dimming option
3. Update on solar proposal presented by Mark Sandeen at March meeting
4) Discussion
1.EnergyServicesCompany(ESCO)
Brief discussion of solar PPA and pros & cons for
Lexington
5)Communicationstatus
1.none
6)Ongoingprojects
1.none
Thefollowingdocuments/exhibitsusedatthemeetingareattached:
(none)