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Hotbox Test R-value Database

Hebel Wall Systems

 

Summary Of Hotbox Test Data And Calculations

Tests performed Winter 1998

 

Meter Chamber Air, ° F (t h)

102.19

Meter Air Speed, MPH

0.89

Meter Chamber Average Surface, ° F (t 1)

97.63

Climate Air, ° F (t c)

64.31

Climate Air Speed, MPH

2.04

Climate Side-Average Surface, ° F (t 2)

62.39

Panel Mean Temperature, ° F

80.91

Meter Chamber Energy Input, Btu/hr (Q h+Q f)

360.99

R-Value, hr ft 2 ° F/Btu (surface to surface)

5.93

R u-Value, (R ms air+R+R cs air) hr ft 2° F/Btu (air to air)

7.08

R ms air, hr ft 2°F/Btu (meter chamber air film resistant)

0.81

R cs air, hr ft 2°F/Btu (climate chamber air film resistant)

0.34

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