LEED Core & Shell EA Credit 1

[DrRTU]

What lighting loads have other mechanical designers used for a LEEDs Core and Shell program? I am trying to run my energy model but the electrical lighting loads will screw up the numbers. The core building “future area” has been designed with temporary lighting of 0.02 watts/sq. ft. I have 4 floors of 20,000 sq. ft. Each floor has 15,000 sq. ft. of unimproved future open space offices of unknown future lighting level. The balance of each floor has 5,000 sq. ft. of hallways and common areas that I will use the space by space method of baseline vs. proposed. I designed the building to carry 1.1 watts per sq. ft. lighting and 5.0 watts per sq. ft. misc. (as per a spec.).

According to the LEED-CS v2.0 Reference Guide:
“Core and shell buildings may not have all of the components addressed by ASHRAE/IESNA 90.1-2004 designed or defined. For these types of projects, it is necessary to show compliance for the scope of work that is controlled by the core and shell team. For example, if there is no lighting scope of work in the core and shell, the core and shell team need not demonstrate compliance with the lighting mandatory and prescriptive provision of the standard, but must show compliance with the other provisions.”

Without a lighting load, my total energy load will be low and the potential energy saving rests more upon HVAC and thermal envelope.

 

[ChrisConley]

Sounds about right. The only 'Core and Shell' projects I've done have had a base lighting load, which did nothing to help our energy model anyhow.

Do you use ASHRAE's Advanced Energy Design guide for Offices to meet/beat 90.1? I don't get involved with lighting design (other than to model it) but I've pointed lighting designers at the book for some energy tips.

 

[DrRTU]

I do have ASHRAE's free Advanced Energy Design guide for Offices. Like you, we did not design the lighting or lighting controls. Today, we found a LEED credit interpretation request that ruled, if a lease hold restriction is in place for the TI of 1.0 watt per sq. ft., they could use a proposed of 1.0 vs. 1.1 in the baseline as per 90. I may go this direction.