Research Project Information

Research Project Summary Information

Energy Saving Dynamic Windows(ST11048-1)

Comfortex Window Fashions


The growing use of more glass in modern residential structures creates a serious heat load in the summer, putting an extra and unwarranted burden on air conditioning systems and higher power consumption. Currently available static window technologies that limit heat loads in the summer do so at the expense of beneficial solar heat gain in the winter, requiring heating systems to work harder. Closing and opening shades or other window coverings are an effective energy-efficiency strategy for managing the changing demands on a home. Still, many homeowners fail to do so consistently. Automated electronic glass, referred to by some as dynamic windows, offers the best solution, however the only real market entry, electrochromic glass is expensive and has certain functional limitations. The new type of dynamic light control panel offered by Comfortex technology will overcome all of the electrochromic limitations.

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Project Description

The Contractor (Comfortex Window Fashions) shall develop the design for an insulated glazing unit that incorporates the ElectroPolymeric Display (EPD) technology. A minimum of three prototype EPD insulated glazing units shall be fabricated and undergo laboratory testing. A final design shall be developed based on the laboratory test results. A minimum of three EPD insulated glazing units shall be fabricated according to the final design specifications. These units shall be installed in a building for a field evaluation. The units may be installed either as primary glazing units, or as exterior or interior window treatment retrofits to existing windows.


When fully developed, EPD would enable buildings to be designed with low cost glazing systems that could be regulated to provide continuously varying degrees of light/energy transmission to building interiors, thereby allowing for greater use of free passive solar heating in winter months, and reduced cooling loads in the summer months, while providing an effective means of glare control as well.

Project Results

This project found that NVMG technology is still in a very early stage of development. Samples sent to an independent laboratory passed several standard window performance tests. The materials, however, did exhibit noticeable deterioration at the end of these tests. Samples used in field tests experienced failures prior to completion of the full round of testing. Energy simulation performed by Rensselaer Polytechnic Institute found the NVMG windows would reduce electricity consumption for air conditioning but increase natural gas consumption for heating. A net energy savings, however, would be achieved from NVMG windows. Based on estimated the energy simulations, the homeowner could expect an annual savings of $1.30 per square foot. A payback period of greater than 15 years results from these values


Comfortex Window Fashions
21 Elm St
Watervliet, NY 12189

Principle Investigator

Jay VanDervoort

Universities Involved


Project Type:

Product Development

Technologies Types:

Building Systems

NYSERDA Contact Information

Robert Carver


R&D - Buildings Research

Contract Details

Start Date: 3/11/2010
Project Status: Active
Contract Number: ST11048-1

Last Updated: 9/17/2014