A superwindow field demonstration program in northwest Montana

Conference · Fri Sep 01 04:00:00 EDT 1989

OSTI ID:5425290

Arasteh, D.; Selkowitz, S.

Of all building envelope elements, windows always have had the highest heat loss rates. However, recent advances in window technologies such as low-emissivity (low-E) coatings and low-conductivity gas fillings have begun to change the status of windows in the building energy equation, raising the average R-value (resistance to heat flow) from 2 to 4 h-ft{sup 2}-{degree}F/Btu. Building on this trend and using a novel combination of low-E coatings, gas-fills, and three glazing layers, the authors developed a design concept for R-6 to R-10 super'' windows. Three major window manufacturers produced prototype superwindows based on this design for testing and demonstration in three utility-sponsored and -monitored energy-conserving homes in northwestern Montana. This paper discusses the design and tested performance of these three windows and identifies areas requiring further research if these window concepts are to be successfully developed for mass markets. 11 refs., 3 figs., 3 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE/CE; DOE/MA
• DOE Contract Number: AC03-76SF00098; AI79-86BP63401
• OSTI ID: 5425290
• Report Number(s): LBL-26069; CONF-891202--6; ON: DE90003268
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING, POLICY, AND ECONOMY
290500 -- Energy Planning & Policy-- Research
Development
Demonstration
& Commercialization
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320107* -- Energy Conservation
Consumption
& Utilization-- Building Systems-- (1987-)
COATINGS
COVERINGS
DEMONSTRATION PROGRAMS
EFFICIENCY
ENERGY CONSERVATION
ENERGY EFFICIENCY
GLAZING
OPENINGS
PERFORMANCE TESTING
PHYSICAL PROPERTIES
R FACTORS
TESTING
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
WINDOWS