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Old 01-22-2011, 09:18 PM   #4 (permalink)
sid
EcoModding Apprentice
 
Join Date: Apr 2010
Location: Florida
Posts: 202

grayranger - '10 Ford Ranger XL 2 door supercab
90 day: 30.43 mpg (US)
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Radiant barriers don't work unless there is an air space on the reflective side. Most references I've read recommend at least a 3/4 inch air space. For a roof, it is recommended that the reflective side face down so that dirt doesn't settle on it and degrade the radiant barrier with time.

Check out this Florida Solar Energy Center publication for more info: FSEC-EN-15
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2010 Ford Ranger, extra cab, 2.3 liter
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