We are attempting to certify a small tenant fit out (7,000sf) in a recently awarded LEED v4 EBOM Gold building with Landmark status. The ceiling falls within landmark regulations so we are not able to alter the layout or look. We are re-zoning, replacing some where necessary and adding daylight sensors but were not planning to change out the fluorescent bulbs (T5 - 21W, 28W and 35W's).
After further review we are NOT meeting the minimum energy performance requirements, due to the sheer number of light fixtures in the space. We considered a LED retrofit but with local ComEd incentives, this would cost our client upwards of almost $15,000 with an estimated payback of 25 years and is not feasible.
Does anyone have any insight on a solution? We're wondering if we might not have to include the existing lighting in the calculations because we're not modifying ALL lighting. Or if we could be granted some exception due to Landmark status. Thoughts?
Any insight would be GREATLY appreciated! Thank you!
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
September 19, 2018 - 10:25 am
I assume you are referencing Option 2. If you cannot meet it then you will need to implement Option 1. I am not aware of an exception in your case.
If Option 1 is not possible then I would ask a lighting retrofit vendor what other options you might have. Lighting systems can be retrofitted many ways beside an outright switch to LEDs. If the current installation does not meet the requirement then it sounds like the lighting power density is too high. I would start asking questions about the lighting system in order to see what is possible. What are the illuminance readings in the space? What type of daylighting controls are you installing? Are the ballasts dimmable? Etc, etc. Engage a knowledgeable lighting retrofit contractor to help you out if you don't have the expertise on the design team.