For our LEED CSv2.0 project, we have been asked to provide a proposed tenant layout for approximately 6 office spaces. There are (2) office spaces and (1) corridor space for each of (3) Roof Top Air Handling Units. As the programming of each office has not been decided as they will be individual and seperate office spaces, we are unable to provide a realistic expected program for each office. Fortunately the OA design for these units are large enough to accomodate the office spaces in a worst case scenario for an office (100% conference / meeting space has the highest occupancy values and OA rate requirements per person). Has anyone had any experience or have any comments on instead of providing an office specific programming layout to provide a narrative and associated ASHRAE 62 calculators showing that the RTU's are capable of handling the office space in these conditions?
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David Posada
Integrated Design & LEED SpecialistSERA Architects
LEEDuser Expert
1980 thumbs up
July 25, 2011 - 1:08 pm
Even if programming hasn't been completed, it should be possible to present a tenant layout plan that would be one of several possible options. The goal here is to show what might reasonably be built, and how the systems would perform for such a potential layout. It's mainly a test fit of a generic space plan to show the system meets the requirements with that case.
Dan Forino
Regional DirectorHorizon Engineering Associates
58 thumbs up
July 25, 2011 - 1:24 pm
All we know about the spaces is that they will be office spaces, so if we show that we are able to exceed our OA requirement in the worst case scenario with the most OA required, shouldn't this be an acceptable method instead of pretending we know what the future layout could be, and as a result possibly undersizing the OA required for the space?