R-value (insulation) contain no trapped CFCs or HFCs (e.g., half-pound low density foams). On certain brands, twenty-year tests have shown no shrinkage or reduction in insulating value. This has led to controversy as how to rate the insulation of these products. Many manufacturers will rate the R-value at the time of manufacture; critics argue that a more fair assessment would be its settled value. The foam industry adopted the LTTR (Long-Term Thermal Resistance) method, which rates the R-value based on a 15-year weighted average. However, the LTTR effectively provides only an eight-year aged R-value, short in the scale of a building that
The Measure of a Man: A Spiritual Autobiography his upbringing and the invaluable legacy of his parents. Just a few years after his introduction to indoor plumbing and the automobile, Poitier broke racial barrier after racial barrier to launch a pioneering acting career. Committed to the notion that what one does for a living shows who one is, Poitier chose to play forceful and affecting characters who said something positive, useful, and lasting about the human condition. "The true measure of a man is in how he provided for his children" this was one lesson Sidney learnt from his father and held dear to his heart all his