Can TDDs impact funding?

As more states move from enrollment to performance-based funding systems, colleges and universities need to find ways to fuel student achievement.

Numerous studies have shown that daylight in classrooms plays an important role in student performance. Its natural brightness, variability and perfect color rendition help students stay alert, work more productively and perform better.

Yet unlike conventional daylighting options (e.g., windows and skylights), tubular daylighting devices (TDDs) deliver natural light without solar heat gain. The result is a brightly lit, comfortable learning environment that allows students and instructors to excel.

When looking for systems that bring in the most light with the least amount of heat, the light-to-solar-heat gain (LSG) ratio is a key metric. It quantifies the amount of usable light to solar heat transmitted into a space. The higher the LSG ratio, the better. A high-performing fenestration system will have an LSG ratio between 1.0 to 1.5, although recent technological advancements have resulted in breakthrough ratios of 3.0 and higher for TDDs.

Innovations prompting this include patented and proprietary daylight-collection domes, lenses and reflectors that maximize light capture and reject heat at the rooftop. Reflective tubing with integrated heat-filtering (cooling) properties further increases performance by transferring large amounts of daylight while minimizing heat gain.

Systems with daylight collectors raise the LSG ratio even higher because they capture natural light that typically bypasses the daylight collection system. In such instances, previously unattainable values nearing 5.0 are possible.

With TDDs, higher education facilities now have a viable solution that promotes student achievement and offers an advantage when it comes to performance funding.

This article originally appeared in the issue of .

About the Author

Neall Digert, Ph.D., MIES, is vice president of Product Enterprise for Solatube International, Inc., Vista, CA (www.solatube.com).

Featured

  • bar graph with the bars made out of abstract cinder blocks and other construction materials

    Spaces4Learning 2025 Trends in K–12: Materials & Construction

    With 2025 well underway, it’s time to take a look at some broader trends submitted by you, our Spaces4Learning readership. We asked for your thoughts on topics like classroom design, health & safety, materials & construction, and technology in both K–12 and higher-education environments. Below is a roundup of 2025 trends in K–12 materials and construction from the experts in the trenches.

  • Wisconsin District Launches Series of Improvement Projects

    The School District of River Falls in River Falls, Wis., recently launched a series of five construction projects scheduled for completion by September 2025, according to a news release. The district partnered with Bray Architects for their design and with integrated construction management firm Kraus-Anderson (KA) for their construction.

  • Clemson to Launch North America’s Largest College Campus Smart Parking Program

    Clemson University in Clemson, S.C., recently announced a partnership with smart parking and curbside management solutions provider eleven-x to launch a smart parking initiative for its population of 29,000 students and faculty, according to a news release.

  • Nureva Pro audio solution

    Nureva HDL Pro Audio Systems Earn HETMA Approved Status

    The Higher Education Technology Managers Alliance (HETMA) has added two solutions from audio conferencing provider Nureva to its HETMA Approved Products list.