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CS-v4.1 EQc4:Daylight

View-preserving automated shades for CS project

Hello, everyone!

I am currently performing a LEED Daylight Option 2 simulation for a Core & Shell (CS) project. At the moment, the percentage of area meeting the 300–3,000 lux range is approximately 53%. However, if the area exceeding 3,000 lux is included under the glare-control exception, the project can achieve approximately 90% compliance.

The difficulty is that, because this is a CS project, certification will likely be submitted before tenant blinds are fully installed. In addition, we are having difficulty meeting the requirement for “automatic” glare-control devices.

It appears feasible to install view-preserving motorized roller blinds with approximately 3% openness and a fabric SHGC of around 0.26, controllable by remote control. However, installing blinds with sensor-based automatic control (e.g. daylight sensors/BMS integration) may be difficult for this project.

In this case, would remotely controlled motorized blinds potentially be considered acceptable glare-control devices for the purpose of the Daylight Option 2 calculator and the >3,000 lux exception?

Additionally, for a CS project, if the Tenant Design & Construction Guidelines require tenants to install blinds/shades in regularly occupied spaces, would it be acceptable to mark the corresponding calculator field as “Yes”?

Thank you for all your guidance!

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