1. Low-Cost, High-Energy Saving Dynamic Windows
Insert installation name

2. Technology Description
Dynamic windows that automatically tint glass in response to changes in sunlight and the sun’s position
Tint level controls interior daylighting, heat gain, and glare
Customize pre-set tint levels to meet requirements for solar heat gain coefficients and visible transmittance
Image source: View

3. How Does It Work
Formed via a stack of five (5) thin coatings applied to the inner surface of the outer pane of glass in an insulated glass unit
To darken the window, low voltage direct current (<5V) is applied. This drives ions from one coating to the next, causing the stack to change tint and also to absorb light and heat.
Reversing the voltage reverses the flow of ions and transitions the stack back to a clear state
Image source: View

4. Benefits of the Technology
Helps meet regulatory requirements for energy reduction
Reduces energy consumption - demonstrated energy savings of 29%
Lowers heat gain in summer and increases heat gain in winter
Reduce whole-building peak load by reducing cooling requirements
Reduces glare
Improves interior daylighting
Does not require blinds or other shading

5. Technology Success Stories
Technology has been successfully demonstrated by ESTCP at Marine Corps Air Station Miramar in San Diego, California, where it demonstrated energy savings of up to 29% at a building housing the Public Works Department.

6. Potential Challenges and Solutions
Occupant Behavior
Occupants may eliminate the benefits by blocking windows entirely if they do not understand the technology. Occupant training is essential, particularly on expectations for tint transition time.
IT Security
Integration with DoD building automation systems would require DoD IT security certification. However, the system can also operate on an autonomous network to limit IT security issues.

7. Sample Financial Considerations
From ESTCP Demonstration:
Low-emissivity (low-e) values based on modeling
Initial investment includes HVAC replacement
Simple payback period 2.91 years
SIR (20 year) 3.36

8. Bottom Line Pros Cons Reduces energy consumption Manages heat gain
Reduce peak load
Reduces glare
Improves interior daylighting
No need for blinds
Cons
Savings can be diminished by occupant behavior
IT security (if BMS integration required)

9. Where to Learn more
Mr. Tim Tetreault, ESTCP Energy and Water Program Manager,
SERDP-ESTCP Website,
Mr. Mark Wasco, POC at MCAS Miramar, ,
Mr. Brandon Tinianov, POC at View, ,

10. Backup Slides

11. Demonstration Performance Objectives

12. Demonstration Performance Objectives