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NC-v4 EQc7:Daylight

Extrapolate daylight results for similar floors

Illuminance simulations should be perform for all the regularly occupied spaces. What if I have 20-storeys building with same geometry and same layout? Simulating each floor seems pointless, becasue results would be almost the same. External obstructions do not influence the building, so the sunlight conditions would be the same (only floor height will change). What I want to do, is perform simulations for two floors: the highest and the lowest and then extrapolate the results for the other floors. Is this approach correct?

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Thu, 01/02/2020 - 12:57

Hai Agnieszka Kaczmarek,   We can show the lower most typical floor daylight simulation, because above floor daylight results are almost higher than the lowermost typical results due to elevation of the building. And for the simulation, If lowermost typical floor receives required amount of daylight then the above floors will meet as well (Since above floor will receive more Daylight).   Hope i cleared your doubt exactly.

Fri, 01/03/2020 - 09:23

Hi Hariharan, thank you for reply, this approach is reasonable and understable to me. Only to make sure: do you base on your experience or there is any document where it is clarify? I'am asking becasue I would have to prepare the narrative and explein this approach. I'm also wondering about Daylight and Views Calculator, can I list only one-storey regulary-occupied spaces, not all of them? Any suggestions?

Sat, 01/04/2020 - 04:12

Hai Agnieszka Kaczmarek, Based on my five years of experience in green building certification, I have submitted many projects with this reasonable logic and its awarded too. This is our perfect understanding based on simulation experience, if floor plans are completely typical (not even shades of windows, interior glazing details, VLT for windows etc.,) means we can show the compliance for lowermost typical floor. There is no statement is there for stating this simulation understanding for compliance option of daylight in LEED. 1.Better you do a simulation for floor by floor and get the clear idea of what am saying now. Then you can get the confident to write the narrative to the USGBC. 2. Or Write a detail query to the your region GBCI member to proceed this credit.

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