Donald Fetzer, with Superior Insulations Systems, San Antonio, demonstrates an inflector window insulator which is used to block the sun's rays and provide energy savings in commercial buildings and a houses. The display was part of an Energy Fair at the Kendrick Enlisted Club, Randolph Air Force Base, Texas. David Terry/released)

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Size: 1336px × 1870px
Photo credit: © PJF Military Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 101027--ox767-, aetc, air, airforce, bulk, dimoc, donald, dvids, energy, fair, fetzer, force, import, military, ra, states, united, usa