Indoor Environmental Air Quality 8.1 - Daylighting and Views - Daylight 75% of Spaces
February 8, 2008 – 8:53amIntent:
- Provide connection between indoor and outdoor spaces through introduction of daylight and views into regularly occupied areas of the building.
Implementation:
- OPTION 1 - GLAZING FACTOR CALCULATION
- achieve min. 2% glazing factor in minimum of 75% of regularly occupied areas.
- OPTION 2 - DAYLIGHT SIMULATION MODEL
- through computer simulation, demonstrate min. daylight illumination level of 25 footcandles in min. of 75% of regularly occupied areas.
- OPTION 3 - DAYLIGHT MEASUREMENT
- through records of indoor light measurements, demonstrate daylight illumination level of 25 footcandles in min. of 75% of regularly occupied areas.
- ALL CASES
- only area associated with room (actual square footage) can be applied toward the 75% total area calculation
- provide daylight redirection and/or glare control devices
Code:
- none
Extra Credit:
- Provide daylighting for 95% (instead of 75%) of occupied areas.
Submittal Phase:
- design
Indoor Environmental Air Quality
- EQ P1 - Minimum IAQ Performance (prerequisite)
- EQ P2 - Environmental Tobacco Smoke (ETS) Control (prerequisite)
- EQ 1 - Outdoor Air Delivery Monitoring
- EQ 2 - Increased Ventilation
- EQ 3.1 - Construction IAQ Management Plan, During Construction
- EQ 3.2 - Construction IAQ Management Plan, Before Occupancy
- EQ 4.1 - Low-Emitting Materials, Adhesives & Sealants
- EQ 4.2 - Low-Emitting Materials, Paint & Coatings
- EQ 4.3 - Low-Emitting Materials, Carpet Systems
- EQ 4.4 - Low-Emitting Materials, Composite Wood & Agrifiber Products
- EQ 5 - Indoor Chemical & Pollutant Source Control
- EQ 6.1 - Controllability of Systems, Lighting
- EQ 6.2 - Controllability of Systems, Thermal Comfort
- EQ 7.1 - Thermal Comfort, Design
- EQ 7.2 - Thermal Comfort, Verification
- EQ 8.1 -Daylight & Views, Daylight 75% of Spaces
- EQ 8.2 - Daylight & Views, Views for 90% of Spaces
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6 Responses to “Indoor Environmental Air Quality 8.1 - Daylighting and Views - Daylight 75% of Spaces”
For Implementation 1, it should be “2% Daylight Factor”, not “Glazing Factor”. Great web site. Very helpful - Bur I don’t think it get me to pass the exam tomorrow, but helpful none the less. I’ll just keep trying until I get it.
By Mike Noon on Jul 6, 2008
I need some clarification, on my flashcard notes I have strategies to consider: light shelves, exterior fins, louvres, and adjustable blinds, among others, but these were mentioned someplace else, in the Calc Method (option 3) that those technologies are not included…,
I am further a little confused about Glare Control, they make a big deal about it, isn’t required? how can you successfully use the Calc Method if it doesn’t include glare control like light shelves, louvres etc…
By valeria on Jul 9, 2008
option 3: compliance by measurement…the credit has to be submited as design submital.How is it posible to measure the day light when the project is in design stage?
By ahamed on Jul 11, 2008
Software like AGI32 by Lighting Analysts, or Autodesk VIZ, maybe Revit too now, and some others, can do 3D daylight modeling.
By Mike Noon on Jul 11, 2008
Mike-
The “2% Glazing Factor” is correct according to the Ref Guide. It says, “Achieve a minimum glazing factor of 2%…”
Valeria-
Those strategies are for all 3 methods. The guide says “In all cases…” Some are daylight redirection tools (light shelves, fins, louvers, etc) and others are glare control tools (blinds, shades, etc). The requirement is to “avoid high contrast situations” by using one or both types of devices if necessary. If you are going to use the calc method then you would want to include all of your daylight redirection tools as this will have a dramatic effect on you daylight penetration and levels. These are typically architectural features and not controlled by the occupant whereas glare control devices are and therefore harder to model.
By Greg on Aug 21, 2008
Ahamed-
You bring up a great point. It’s obvious that its meant to be actual measurements and not simulation measurements because there is another option of simulation models looking for the same information. It’s kind of hard to do actual measurements if this is a design phase submittal. I suspect that there would be some allowance made for this when you note that choice on the template form and follow up with the data during the construction phase.
By Greg on Aug 21, 2008