Our Solatube Daylighting Systems are known as Tubular Daylighting Devices (TDDs). They capture sunlight using a rooftop dome, then transfer it indoors through a reflective tube that runs from the roof to the ceiling. From there, the light is evenly dispersed into the interior space using a diffuser.

1. Presented by:
Todd Maerowitz
Director of International Sales
Solutions for Egypt

2. Agenda
• Technology Overview
• Economic and Environmental Example
• Human Performance Improvement
• Solatube Products

3. Daylighting Options
Traditional Skylights
Benefits:
 Not dependent on
building orientation
 Daylight deeper into
building
Challenges:
 Up to 10% of roof
area
 Can be expensive
 Transient light
patterns
 Volatile light levels
 Lack of control
 Top floor limited
 Complex architectural
integration
 Historical problems
with leaks
 Punishing thermal
performance
Windows
Benefits:
 View of the world
 Design feature
Challenges:
 Orientation dependent
 Perimeter limitation
 Punishing thermal
Performance
 Glare
 Easily obstructed
 Sound control
 Transient light patterns
 Volatile light levels
Optical TDDs
Benefits:
 Highly consistent and
controllable daylight
 Daylight any space in
nearly any climate
 Minimal roof structure
impact (<2%)
 Superior thermal
performance
 Endless possibilities
with highly flexible,
modular system
 Leak-proof design
 Cost-effective
Challenges:
 Only your imagination…

4. Solatube Technology
Capture
Transfer
Deliver+Control

5. Capture
Raybender and LightTracker Technologies
• Passive optics
• Maximizes light capture
• Improves low angle light collection
• Controls high angle light
• Minimizes heat gain
Minimize roof area required for daylighting
• Less structural reinforcement needed
• High insulation capacity of building envelope maintained
• More space on roof for solar power panels or other equipment

6. Transfer
Spectralight Infinity Tubing
Light Transfer Efficiency (LTE)
• Highest specular reflectance for visible light 99.7%
• Multi-story installations with minimal light loss
• Extremely long tube runs
• Angular capability: multiple 1-90 degree turns
Light to Solar Heat Gain (LSG)
• Cool Tube Technology minimizes heat gain
Color Temperature Maintenance (CTM)
• No color shift

7. Deliver + Control
Diffusers, Decorative Fixtures, Dimmers
• Engineered lens optics for consistent distribution patterns
and maximum delivery of light to work plane
• Daylight Dimmer for total control of meeting room and
theatre lighting environment
• Stylish and functional interior options

8. Economic and Carbon Emissions
Reduction Example

9. Daylighting Comparison
Versus Electric Lighting
Site Assumptions:
– Cairo
– 70 x 70 x 12 meters
– Insulated building
envelope (roof & walls)
– Air-conditioned interior
– Exterior average of 4
degrees warmer
Daylighting Assumptions
– Replace electrical lighting
during daytime hours
– True sunlight intensity at
location
– Transition to electrical light
at dawn & dusk
– Design with Solatube
SkyVault

10. Design Results
from assumptions
420 lux average
dawn to dusk
Ceiling Plan
(121 units)

11. Daylighting Impact on
Electric Lighting Expense
Lighting costs reduced up to 80% with daylighting - Massachusetts Institute of Technology

12. Solatube Quantitative Benefits
Annual
Electric Lighting Saved 125,103 kWh
Net Financial Savings 63,810 LE
CO2 Emissions Avoided 89,328 Kg

13. Electric Lighting Increases HVAC Energy Expense
HVAC
Up to 20% of HVAC energy expense can be saved by daylighting - FacilitiesNet
which daylighting mitigates

14. Solatube Quantitative Benefits
Annual
Electric Lighting Saved 125,103 kWh
HVAC Energy Savings 35,571 kWh
Net Energy Savings 160,674 kWh
Net Financial Savings 80,340 LE
CO2 Emissions Avoided 112,472 Kg

15. Daylighting Also Adds Heat
Which can increase HVAC Load
HVAC
Which Solatube Technology Minimizes

16. Highest Light to Solar Heat Gain Ratio

17. Solatube Quantitative Benefits
Annual
Electric Lighting Saved 125,103 kWh
HVAC Energy Savings 35,571 kWh
HVAC Loss from Solatube (1,711) kWh
Net Energy Savings 158,963 kWh
Energy Financial Savings 79,480 LE
CO2 Emissions Avoided 111,274 Kg

18. Daylight and Human Performance Research

19. • Spectralight Infinity is spectrally neutral for
visible light with virtually no color shift.
Underlying Basis of Performance
Natural Light spectrum

20. Daylighting Improves Human Performance
• Increased staff productivity
• Reduced absenteeism
• Increased employee retention
• Improved student performance
• Improved quality control
• Increased retail sales
• Improved healing time
• Improved mood
• Greater occupant well-being & satisfaction

21. Human Performance Improves the Bottom Line
example data
• Profit from increased sales associated with daylighting is worth at
least 19 times more (and up to 100 times more) than the energy
savings from daylighting - California Energy Commission
• Retails sales per square foot significantly higher with daylighting -
Wal-Mart
• Energy bills reduced by 50% and absenteeism drops by 45% -
Hewlett-Packard
• Worker productivity improves by 15% with daylighting - Lockheed
• Daylight improves student test scores by 26% - Northwest Energy
Efficiency Alliance

22. Added Human Performance Benefits
with $0.35/sq-m/month impact
Electric Lighting Saved 125,103 kWh
HVAC Energy Savings (Expense) 35,571 kWh
HVAC Loss from Solatube (1,711) kWh
Net Energy Savings 158,963 kWh
Energy Financial Savings 79,480 LE
Human Performance (3X
Benefit)
200,000 LE
Net Financial Savings 279,480 LE
CO2 Emissions Avoided 111,274 Kg

23. Solatube Competitive Position
• Versus Electric Lighting:
– Reduce energy expense
– Increase human performance
– Reduce carbon footprint
– Increase energy independence
• Versus Other Daylighting Options:
– Increase space available for solar power
– Reduce structural reinforcement cost
– Reduce energy cost from heat gain
– Higher consistency & control of lighting levels

24. Solatube Products

25. Flexible Product Configuration