“Glazing improves [fuel] efficiency by 3%.”
A specific window-glazing technique that increases fuel efficiency has drawn renewed criticism from an unfamiliar player in automobile standards — the telecommunications industry.
CTIA-The Wireless Association — the trade association representing wireless carriers, equipment manufacturers and Internet service providers — is concerned that fuel economy regulations would encourage the use of a specific energy efficient window-glazing technology that could block wireless reception in vehicles.
The window technology in question is called metalized glazing, a technique for windows, windshields and moon roofs that reduces the amount of sun’s heat that enters cars. Glazed windows are manufactured by adding a very thin layer of metal particles from zinc, cadmium and indium that reflects solar radiation.
This layer can also block radio frequencies for cellular phones, GPS navigators and other wireless devices.
Glazing can reduce the temperature inside a car by up to 9.7 degrees Celsius, translating into an emissions reduction of 2.9 to 3.9 grams of CO2 per mile, according to EPA and NHTSA’s technical support document for CAFE standards. The standards do not specify metalized glazing over other types…