Lead Performer: Alpen High Performance Products Inc. (Louisville, CO); partners: Sage Electrochromic: Faribault, MN, National Renewable Energy Laboratory - Golden, CO
August 21, 2023Lead Performer: Alpen High Performance Products Inc. - Louisville, CO
Partners:
-- Sage Electrochromic - Faribault, MN
-- National Renewable Energy Laboratory - Golden, CO
DOE Total Funding: $1,200,000
FY23 DOE Funding: $600,000 (Estimate)
Cost Share: $300,000
Project Term: October 1, 2021 – October 31, 2024
Funding Type: Funding Opportunity
Project Objective
This project aims to 1) dramatically reduce the installed cost of EC architectural-glass and secondary-window technology in new and replacement windows by relocating Sage’s EC device layer off the outer (#1 surface) IG (insulating glass) light, and 2) package the Sage “device layer” in a light, fiberglass-framed secondary window to be quickly installed and powered in the absence of on-site electrical contracting.
Project Impact
The successful commercialization of the above two EC configurations is projected to reduce the installed cost of either new-construction or retrofit dynamic EC technology by more than 50%. An immediate market segment totaling in excess of $100M has been identified, and immediately addressed with both thin-glass triple IG and “WinSert” fiberglass framed thin-glass glazing products absent EC capability. The Project Objective is to replace the thin-glass components of present Alpenglass and WinSert configurations with Sage’s thin electrochromic glass.
Contacts
DOE Technology Manager: Marc LaFrance
Project Manager: Robert Clarke
Related Publications
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Alpen-Sage Project Prototype – Empire State Building
Left window: Top and bottom sash EC IG (device layer midway between inner and outer glass lights). Right window: Base case instrumented and monitored for both HVAC performance and occupant comfort.

ElectroChromic WinSert Secondary Window
7/8” Insulating glass / outer Sage EC device layer + film / Krypton fill / inner 1/8” low-e. Project goals include wireless power and control.