PROJECT PROFILE
Con Edison, Inc.
New York City, NY
Con Edison Leads Adoption of Vacuum-Insulated Secondary Windows in NYC
In December 2024, ConEd implemented a first-of-its-kind window upgrade at its NYC headquarters, transforming single-glazed windows into triple-glazed vacuum-insulated systems without replacement. The pilot installation in the CFO’s office used INOVUES’ patent-pending breathable SWR system paired with LuxWall’s vacuum-insulated glass, maintaining the building’s historic appearance while preventing condensation and preserving daylight.
Independent measurement verification (M&V) revealed that INOVUES’ secondary windows improved thermal performance from R1 to R9+, delivering substantial energy savings at a fraction of the cost of window replacement. Following the success of this pilot, ConEd decided to expand deployment of INOVUES’ solution at its headquarters.
“Secondary windows proved to be a cost-effective alternative to replacement, delivering significant energy and comfort benefits at a fraction of the cost and with minimal disruption.”
Silvia Khurrum, PM - R&D, ConEd
Upgrading Historic Windows for Modern Performance
Client Objectives
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Increase energy efficiency and reduce emissions
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Improve occupants’ thermal & acoustic comfort
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Minimize retrofit cost and disruption
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Non-invasive and non-disruptive interior retrofit solution
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INOVUES® breathable (SWR) system
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LuxWall® Enthermal vacuum-insulated glass (VIG)
Retrofit Features
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Over 9 times higher thermal insulation
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More than 90% heat loss reduction
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Estimated payback of 5 years with incentives
Measured Benefits
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Performance Table
The performance metrics were validated via independent M&V. A modified ASTM C1046 procedure was used for on-site thermal evaluation (heat flux measurement) on multiple windows.
Total Window U-Value (BTU/Hr ft2 ° F) | Total Window R-Value (Hr ft2 ° F/BTU) | Annual Heat Loss (BTU) | Reduction Rate (%) | Utility Incentive Rate per Mlb Saved ($) | Estimated Payback (yrs) | |
|---|---|---|---|---|---|---|
With INOVUES SWR-VIG | 1.11 | 0.9 | 12,715,315 | N/A | N/A | N/A |
Without INOVUES SWR-VIG | 0.11 | 9.13 | 1,210,982 | 91% | 200 | 5 |
Total Window U-Value | Total Window R-Value | Annual Heat Loss | Reduction Rate | Utility Incentive Rate per Mlb Saved | Estimated Payback | |
|---|---|---|---|---|---|---|
With INOVUES SWR-VIG | 1.11 | 0.9 | 12,715,315 | N/A | N/A | N/A |
Without INOVUES SWR-VIG | 0.11 | 9.13 | 1,210,982 | 91% | 200 | 5 |
(BTU/Hr ft2 ° F)
(Hr ft2 ° F/BTU)
(BTU)
(%)
($)
(yrs)
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Footnotes.
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U-value and R-value were evaluated based on the ASTM E1155 protocol.
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Based on a 5-year weather data model (Central Park). Calculation is based on 12 months of data including heating and cooling seasons. Heat loss is only accounting for conduction loss/gain only.
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Per Con Edison’s Commercial and Industrial (C&I) energy efficiency 2025 incentive program.
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Simple payback after utility incentives. Does not factor in escalation rates or federal tax deduction.
