Video Transcript: U-Factor vs. R-Value
What U-Factor Measures
So, U-factor is a measure of how well a door, a wall, or some other product conducts heat.
Why a Lower U-Factor Matters
A lower u-factor signifies better insulating performance, better energy efficiency.
It’ll keep your building cool in the summer or warm in the winter.
R-Value Limitations
Despite a high R-value for a specific component, the overall performance of a product may suffer because of the R-values of other components.
Marketing vs. Reality
Manufacturers often highlight the best insulating component of their product, but this may not accurately depict the product’s overall performance.
Testing for Accuracy
The U-factor of the entire assembly can be determined through a physical testing. For example, the DSMA 105 test offers a more accurate depiction of the product’s overall performance by including most of the components of the door.
These include curtain, guides, bottom bar, and perimeter seals.
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