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Abstract
One of the most controversial issues with polyiso and other plastic foam insulaton has been the accurate determination of the long-term thermal resistance (LTTR)value of these products. Because there is a reduction of thermal resistance over time, it is difficult to predict the LTTR over a 15 or 20 year time. There now exists a new scientific method to predict LTTR, which then can be used for energy calculations and design purposes.
One of the most controversial issues with polyiso and other plastic foam insulaton has been the accurate determination of the long-term thermal resistance (LTTR)value of these products. Because there is a reduction of thermal resistance over time, it is difficult to predict the LTTR over a 15 or 20 year time. There now exists a new scientific method to predict LTTR, which then can be used for energy calculations and design purposes.
Date
7/2002
7/2002
Author(s)
Johns Manville
Johns Manville
Page(s)
3
3
Source
Johns Manville
Johns Manville
Keyword(s)
polyisocyanurate; Johns Manville; bulletin; LTTR;
polyisocyanurate; Johns Manville; bulletin; LTTR;