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NC-2009 IEQc6.2:Controllability of Systems—Thermal Comfort

Mixed strategy, windows and mechanical ventilation?

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Lise Dannesboe
Sustainability Manager
COWI
LEEDuser Premium Member
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If I understand the intent of the credit correctly, we have to provide individual controls for every second FTE in individual spaces or open-plan offices. That means every second person has to be able to control heating, cooling, ventilation or humidity INDIVIDUALLY. It is not enough to separate the open plan office space into zones (of f.ex. zones with 10 FTEs) and give every person in the zone possibility to control the indoor climate for the whole zone. Correct? We do not have an underfloor systems and it will be difficult to achieve that credit for our open plan offices. Can we mix the strategy and provide employees with the possibility to open windows within 20 ft from the window (and 10ft on either side) and provide the employees not placed in areas where windows can be opened or further away from windows with adjustable local air diffuses in the same room? Furthermore we could think about the possibility to provide the employees sitting next to radiators with the possibility to control their temperature and the employees not sitting next to the radiator with adjustable local air diffuses in the same room? This is provided every second FTE has a control. Thanks,

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Tue, 07/30/2013 - 19:08

Hi Juliane, Yes, you have to provide individual controls for half of your individual workstations. It's actually not necessarily by FTE, but by your workstation count. You might have more workstations than FTE though they are often the same number or very close. You are correct to say that the credit is not achieved through zoning. It can be tricky to achieve in an open office environment though the ways you describe, through using windows and underfloor air diffusers could get you there. A combined effort through multiple controls is perfectly acceptable.

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