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NC-v4 EAp2:Minimum energy performance

Daylight Control In Hotel Rooms

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Ricardo Sá
Director of Sustainability
Edifícios Saudáveis Consultores (503 910 767)
LEEDuser Basic Member
79 thumbs up

Dear All,

 

Regarding the mandatory requirements of ASHRAE 90.1 for automatic daylighting control.

 

Our project is a hotel and bedrooms have large windows, so the primary sidelighted area of each room is above 250 ft2. Considering this is a hotel, and that the this type of control in the bedrooms (daylight control, ON/OFF or dimming) may cause some discomfort to the clients, do the daylight control requirements apply?

 

And in the case that the room has only 1 fixture in the ceiling?

 

Please note that for all other areas (offices, reception, etc) daylight control will be installed.

 

Thanks in advance

 

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 05/08/2020 - 19:38

I don't see any exception for this situation.
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Keith Robertson
President
Solterre Inc.
LEEDuser Premium Member
47 thumbs up

Fri, 05/08/2020 - 21:18

It's hard to imagine that a hotel bedroom has a primary sidelighted area of more than 250 sf. That would be a 21 foot wide window with a 10 foot head height. Is that really the case?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 05/08/2020 - 21:37

I think that the 250 sf is the area of the enclosed space that contains the window(s), not the window area itself.

Mon, 05/11/2020 - 08:02

See definition of primary sidelighted area at p. 13 of ASHRAE 90.1-2010.
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Ricardo Sá
Director of Sustainability
Edifícios Saudáveis Consultores (503 910 767)
LEEDuser Basic Member
79 thumbs up

Mon, 05/11/2020 - 10:58

Thank you, Marcus! Windows may have 13 foot head height in some cases.  

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