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
Dubai Chamber of Commerce and Industry (building) Dubai Chamber of Commerce and Industry (building) Dubai Chamber of Commerce and Industry (), also referred to as the Chamber of Commerce Building, is a building in Dubai, United Arab Emirates (UAE). Located in eastern Dubai in Deira, the building is the headquarters of the Dubai Chamber of Commerce and Industry. It is located in the Rigga Al Buteen community, along Dubai Creek and is part of the old Dubai downtown. At in height, the Chamber of Commerce building was the seventh-tallest building in Dubai at the time of its construction in 1995 (after Dubai World Trade Centre, Deira Tower,