Exciting New Projects in 2012
March 18 2013
LightLouver LLC supplied LightLouver units for many exciting projects in 2012. A few of the projects that incorporated the LightLouver Daylighting System are as follows:
Salida High School in Salida, Colorado
McKenny Hills Elementary School in Silver Springs, Maryland
Brattleboro Food Cooperative in Brattleboro, Vermont
Carbon Neutral Energy Solutions Laboratory, Georgia Tech University, Atlanta Georgia
Franklin High School in Sacramento, California
Fauquier High School in Warrenton, Virginia
Grand Junction Police Station in Grand Junction, Colorado
West Virginia State Office Building in Logan, West Virginia
Mt. Sinai Hospital in New York City, New York
Intermountain Healthcare Integrated Materials, Ancillary services and Transportation
in Salt Lake City, Utah
Texas Instruments Office Building in Dallas, Texas
Siemens Office Building in Cary, North Carolina
As you can see, design teams have incorporated the LightLouver Daylighting System into a variety of building types in a variety of locations throughout the U.S. We will be adding images of some these projects to the Project Portfolio page of the web site in the coming weeks. Please contact us if you have any questions about these or other projects where the LightLouver Daylighting System has been installed.
Michael Holtz Presents Paper at World Renewable Energy Forum
August 21 2012
Michael Holtz, FAIA, a founder and principal of LightLouver LLC, presented a paper at the recent World Renewable Energy Forum / American Solar Energy Society Conference in Denver, Colorado. Co-authored with Zack Rogers, P.E., Director of Engineering, the paper, entitled “ Comparative Evaluation of Side-Daylighting Strategies”, evaluates five general side-daylighting strategies – passive optical daylighting system (LightLouver™ Daylighting System), interior and exterior light shelves, and automated interior and exterior shades or blinds -- on a quantitative and qualitative basis. Evaluation criteria included the following: deep uniform daylight distribution, solar/glare control, energy savings, installed cost, and architectural integration. Results from lighting simulation using the Radiance software were used in the comparative evaluation.
A PDF of the paper is available for download by clicking the following link:
Primary conclusions from this comparative evaluation of common side-daylighting strategies were as follows:
- Daylighting must be a primary strategy for complying with current and future energy and environmental regulations in commercial buildings. Low power density electric lighting alone, whether through fluorescent or LED lighting, will not be sufficient to meet stringent current and future energy code requirements.
- Side-daylighting approaches will be the primary means for daylighting multi-story commercial buildings. Thus, architectural massing and orientation will have a large influence on achieving significant daylighting contribution.
- Side-daylighting approaches must effectively address the daylighting design challenges -- collecting and redirecting daylight deep into the daylit space without attendant glare and direct sunlight patches on work surfaces -- or they will not be accepted by the building owners and occupants, or the building design profession.
- Only one of the common side-daylighting approaches evaluated - the LightLouver Daylighting System - effectively addresses the daylighting design challenges of glare, solar control, deep daylight distribution, and integration with electric lighting, daylight responsive controls, HVAC systems, and interior design elements. Consequently, the remaining side-daylighting strategies are generally compromised by the building occupants through their actions, such as keeping the blinds or shades closed all the time, or placing cardboard panels in the “daylight windows” above light shelves to block direct sunlight from striking their work surfaces or creating disabling glare in their field of view.
- Glare or limited daylight distribution are the primary limitations of most side-daylighting approaches. If side-daylighting strategies are to be widely used in multi-story commercial buildings, they must be able to daylight a large portion of the floor plate – deep daylight penetration, and do so without glare and direct sunlight striking work surfaces.
- The LightLouver Daylighting System currently best addresses the daylighting design challenges. Looking at the qualitative and quantitative evaluation criteria and the analysis results, the LightLouver Daylighting System appears to satisfactorily address more criteria then any of the other evaluated side-daylighting strategies.
- The deepest and most uniform daylighting is provided by the LightLouver Daylighting System. While interior or exterior light shelves can allow for daylight deeper into a space, they have not been optically designed to collect and uniformly distribute sunlight throughout the year (angle in incidence = angle of reflectance), and to provide complete glare /solar control. For most manufactured or site built light shelf designs, during low (winter) sun conditions, sunlight will come over the top of the light shelve and create glare conditions at the window and allow direct sunlight patches on work surfaces. The LightLouver Daylighting System intercepts direct sunlight (down to a 5o cut-off angle) and redirects this sunlight up and deep into the space, thus minimizing any glare and direct sunlight penetration onto work surfaces.
- When direct sunlight strikes south, east and west facing fenestration, interior or exterior window shades and blinds must be closed to block direct sunlight from entering the space and creating disabling glare, high contrast ratios, and direct sunlight patches on work surfaces. Thus, side-daylighting strategies, such as automated blinds and shades, are limited in the depth of daylighting they can provide. However, passive optical daylighting devices, such as the LightLouver Daylighting System, can continue to collect and distribute sunlight during periods of direct sunlight on the fenestration, as their optical geometry has been design to redirect sunlight while minimizing glare and eliminating direct sunlight patches on work surfaces.
New CSI specification sections created for the LightLouver Daylighting System
September 06 2011
Thanks to the efforts of Michael Holtz, FAIA, Founder and Principal at LightLouver LLC, the design and construction industry has two new specifications sections in CSI’s MasterFormat ™ construction specification system. Prior to Michael’s proposal to CSI, daylighting products did not have a specific CSI number or title for specifying interior or exterior daylighting devices. Specification writers could place daylighting product specifications wherever they thought appropriate. No more! Thanks to Michael’s proposal the CSI MasterFormat Committee has created two new Sections for daylighting devices. The first new CSI section is in Division 12 and has the Section number 12 26 00 and has the title Interior Daylighting Devices. The second new CSI section is in Division 10 and has the Section number 10 71 13.53 and has the title Exterior Daylighting Devices.
The LightLouver Daylighting System will now be specified in Division 12 Section 12 26 00, and we have already modified our construction specification to reflect this new home for specifying LightLouver units. Way to go Michael, and the daylighting products industry is in your debt for creating a home for daylighting products in CSI’s MasterFormat construction specification system.
Projects recently completed: Columbine Elementary and Stapleton Elementary
July 06 2011
Working with Adolfson & Peterson Construction and GE Johnson Construction on Columbine Elementary School and Stapleton Elementary School, respectively, LightLouver technicians have completed the fabrication and installation of LightLouver units at both schools with great success. We are excited and honored to be a part of these two beautiful new schools, and plan to post pictures of the installations when they become available. Please check our website again soon to see pictures.