Our building is an amenities building with food service, gymnasium, clicinal spaces, etc. but as a Core & Shell, only includes exhaust and a split unit for the restrooms. There is no base building ventilation for the Core & Shell, only as part of the TI scope later. The Core & Shell was given a mechanical well to meet the demands of the TI, but without dipping into that proverbial well, and including TI related ventilation equipment, we wouldnt have any ventilation equipment to work with for the Energy Model, and furthermore, for ASHRAE 62.1/EQp1.
How might we proceed without design details for base building ventilation equipment? This seems rather like an unconventional configuration for a design build but isnt - its a cold shell. The energy modeler however, isnt quite certain how to proceed with the energy model - if we exclude ventilation components, how do we then go about justifying the ASHRAE 62.1 calcs? I suppose we have two options: Either include the Proposed TI ventilation attributes (if we know what it is), OR render the baseline and proposed cases equal to one and other, basically a wash. Any input on this matter is appreciated!
Tyler Thumma
7GroupLEEDuser Expert
67 thumbs up
November 6, 2020 - 9:01 am
For the energy model you would model the HVAC systems for the TI spaces identically using the Appendix G Baseline requirements. The ventilation would also be modeled identically using ASHRAE 62.1 minimum rates.
For EQp1 you would simply exclude those TI spaces if the ventilation systems are not included in the C&S scope of work. I would recommend providing a narrative to the reviewer explaining this.
Levi Jimenez
Founder & Senior ConsultantViable LLC
12 thumbs up
November 19, 2020 - 2:40 pm
Tyler,
Thanks for the reply! So to be clear, we would not be permitted to use future installed TI ventilations equipement even though we know what it is, correct? It would be baseline only for C&S? I ask only becasue under water performance, the prerequisite allows the use of future installed fixtures and fittings and just need to be certain. Unfortunately without considering ventilation, which is the star of the show in this case, we have been left with a tremendous deficit of points and not meeting the required performance efficiency requirements.
Tyler Thumma
7GroupLEEDuser Expert
67 thumbs up
December 2, 2020 - 11:14 am
The only way to model credit for future installed equipment is through a binding tenant sales and lease agreement which has been signed by the future tenant. Here is the language from the LEED v4 Reference Guide:
"If a project team wishes to pursue additional credits or thresholds beyond the construction scope of the LEED project, a binding tenant sales and lease agreement must be provided as documentation. This must be signed by the future tenant and include terms related to how the technical credit requirements will be carried out by the tenant. An unsigned or sample lease agreement is not acceptable. Please note that lease agreements are not required in order to pursue Core and Shell. They are only used if a project is aiming to earn additional points considered outside of the project design and construction scope that will be fit-out by a future tenant."