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Green Energy > R-Value
The following information is about R-Value.
R-Value Defined
Describes the insulating property of materials on a scale of 0 to infinity, with 0 being a perfect conductor of heat. As the number goes up, so does the resistance to heat transfer. R-value per-inch is the measured resistance of heat flow per each inch of material, for example, aluminum has an R-value per-inch of 0.00090125, fiberglass has an R-value per-inch of about 3. Total R-value is the measured resistance to heat flow of a material. An entire wall set-up would have a total R-value based on the materials used.
This definition is in context to Green Energy. See more contextual defintions for R-Value.
Do It Yourself
Published September 6, 2008, 12:40 am, Washington Post
Q: I want to put an insulated cover on the whole-house fan, which is in the attic floor, when the fan is not in use. Can you help?
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Off-site R-Value Links, User Submitted
The following links have been collected through user bookmark submission in the R-Value category. Please note, because these resources are off-site we cannot guarantee the accuracy or quality of any information.
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- R-Value Table: Use the R-value table below to help you determine the R-value of your wall or ceiling assemblies. To obtain a wall or ceiling assembly R-value you must add the r-values of the individual components together.
- Insulation R-Value: Insulation R-Value table
Mon Feb 25
- R-value Guidelines: A table on a gov. website that shows recommended R-values for different types of insulation
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