what is the temp of the r
The Rule requires that R-value tests be conducted at a mean temperature of 75Â°F (23.9Â°C) and a temperature differential of 50Â°F (27.8Â°C). This means that insulation is usually tested with the cold side at 50Â°F (10Â°C) and the warm side at 100Â°F (37.8Â°C).3.