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CS-2009 IEQc1:Outdoor Air Delivery Monitoring

Achieving IEQc1 with no ventilation as part of C&S project

Can this credit be achieved if there will be no ventilation as part of the C&S project? I know the requirements for tenants to comply can be covered with a lease agreement, but the form makes you select what type of ventilation the building will have; mechanical or natural. Since there is no ventilation as part of the C&S project I cannot check either box and the form cannot be completed. Even if I use special circumstances and enter a statement the form still cannot be completed due to not checking one of these boxes. How will I be able to demonstrate compliance using the lease agreement? Or can this credit not be achieved if the C&S project doesn't have ventilation? Would greatly appreciate input anyone may have.

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Profile picture for user tristanroberts
Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Thu, 04/05/2012 - 14:56

Tony, I think the answer to your question, or at least the best answer available, is specific in CS Appendix 4, Case 3, in the LEED Reference Guide—you need to rely on the tenant agreement. If you feel that you just don't have any idea how the project will be ventilated, though, then perhaps IEQc1 is not a good fit for this project. As a side note, I'm surprised that a shell can be designed and built without taking into account good design for either natural ventilation, or an assumption of mechanical.

Thu, 04/05/2012 - 15:30

Thanks Tristan, based on your response I think the answer is that we either need to incorporate natural ventilation in the C&S project, or assume mechanical ventilation for the tenant build-outs and incorporate that requirement into the lease agreement. If we choose the mechanical ventilation option, we can check that box in the form since that is our requirement for the tenants, even though the C&S itself will not be ventilated. Does that sound right? Also, one other question - for the case of a warehouse C&S project, would it be adequate to require the tenants to ventilate the office spaces only, and not the warehouse itself? Warehouses tend to have high infiltration through dock doors and other openings and sometimes do not have any other method of ventilation. Will LEED require that we have a means of ventilating the warehouse space other than infiltration?
Profile picture for user tristanroberts
Tristan Roberts
Representative
Vermont House of Representatives
LEEDuser Expert
7780 thumbs up

Thu, 04/05/2012 - 17:45

Tony, that does sound right. Regarding the warehouse, LEED pretty much relies on ASHRAE 62 for expectations in this credit. And I believe that ASHRAE 62 will have some minimum ventilation rates for a warehouse that is used as a workplace. If you want to go with natural ventilation, then I would make sure you have enough infiltration by formalizing a design for that.

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