High Performing Buildings - Spring 2008 - (Page 36)

Architectural detail intentionally darkens the projection screen while still allowing daylight to the rest of the classroom. be 120 footcandles at a low window and 20 footcandles at a distance 8 ft away. However, with lightshelves, this is an effective multistory day- lighting strategy in rooms with 10 ft ceilings and no more than 15 to 20 ft deep from the window. The deeper the room, the higher the ceiling must be. The daylighting windows should be placed as close to the ceiling as possible. • Select durable but reﬂective lightshelf material. Aluminum is a good option. GLASS-TO-FLOOR AREA GUIDELINES Small to Midsize Spaces (Classrooms) South-Facing Roof Monitor South Lightshelf South Lightshelf With Blinds Between Glazing North-Facing Roof Monitor High North-Facing Transom Glazing 10% to 18% 12% to 15% 15% to 20% 7% to 10% 8% to 11% Large Volume Spaces (Gymnasium) 5% to 8% 8% to 11% • • Shade low view glass. The exterior lightshelves can shade the windows below. If using window treatments, do not install one continuous blind that covers the top lightshelf glass and the low view glass. Stop direct beam light with blinds between the glass. An interior lightshelf usually cannot stop direct beam light from entering the top section of glazing when the sun has a low altitude. One option is to incorporate an extended interior lightshelf, but this requires a Until detailed daylighting analysis is conducted, these guidelines, developed based on my experience, can be useful in estimating daylighting glazing amounts for particular approaches. 36 HIGH PERFORMING BUILDINGS Spring 2008

Table of Contents for the Digital Edition of High Performing Buildings - Spring 2008

High Performing Buildings - Spring 2008
Daikin AC (Americas)
Contents
Seattle City Hall
SEMCO
3M Energy & Advanced Materials
Price
Sofame Technologies Inc.
Sweetwater Creek Visitor Center
ASHRAE Certification
Greenheck
Daylighting Strategies That Maximize Benefits
Energy Conservatory, The
ASHRAE e-learning
Ecobuild America
CTG Energetics, Inc.
Cambridge City Hall Annex
Tate Access Floors, Inc
Air-Conditioning, Heating, & Refrigeration Institute
31 Tannery Project
Building Owners & Managers Institute
Indian Springs Discovery Center
International Facility Management Association
ASHRAE Healthcare
Fulton Companies, The
AAON, Inc.

High Performing Buildings - Spring 2008