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Agenda
• Technology Overview
• Economic and Environmental Example
• Human Performance Improvement
• Solatube Products
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…
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
Transfer
Spectralight Infinity TubingLight 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
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
Daylighting ComparisonVersus 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
Daylighting Impact on Electric Lighting Expense
Lighting costs reduced up to 80% with daylighting - Massachusetts Institute of Technology
Solatube Quantitative BenefitsAnnual
Electric Lighting Saved 125,103 kWh
Net Financial Savings 63,810 LE
CO2 Emissions Avoided 89,328 Kg
Electric Lighting Increases HVAC Energy Expense
HVAC
Up to 20% of HVAC energy expense can be saved by daylighting - FacilitiesNet
which daylighting mitigates
Solatube Quantitative BenefitsAnnual
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
Solatube Quantitative BenefitsAnnual
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
• Spectralight Infinity is spectrally neutral for visible light with virtually no color shift.
Underlying Basis of PerformanceNatural Light spectrum
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
Human Performance Improves the Bottom Lineexample 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
Added Human Performance Benefitswith $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
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