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Summary Report
Interior Temperatures
Interior Humidities
Interior Dewpoints
Ambient Conditions
HVAC System
Attic Temperatures
Attic Humdities
Attic Dewpoints
Roof Surface Temps
Floor Surface Temps
Misc Weather
Night Cool Controls
NCool Performance

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The Night Cool research site demonstrates an experimental building concept that uses the cool, roof decking as a heat sink for cooling. Once the attic air mass is cooled to a specific temperature, it is then circulated to the interior space to off-set internal heat gains and reduce the overall air conditioner energy use. The experiment consists of two identical, wood frame constructed buildings with differing roof systems. The control building has a white metal roof on plywood decking and a vented, R-30 batt insulated attic. The experiment also has a white metal roof however, it is fastened to steel furring strips across the rafters and no plywood decking. The attic is sealed and over an R-30 SIP ceiling.

Mar 26 2016, 00:15 -To- Mar 27 2016, 00:00 EST

Electric Power Use

Peak Watt-hrs

Experiment AC 0.0 0.0
Control AC 0.0 0.0
Control Lights 4.0 14.0
Experimental Lights 8.0 39.0
Experiment Fans 0.0 0.0

Building Conditions


Experiment Roof Surface 77.5 64.6/ 102.6
Control Roof Surface 78.3 64.7/ 106.1
Experiment Attic Temp. 76.8 66.4/ 93.6
Control Attic Temp 76.9 68.7/ 87.6
Experiment Room Temp. 76.9 73.6/ 80.0
Control Room Temp. 75.6 72.6/ 78.6
Experiment Room RH 57.2 54.2/ 60.6
Control Room RH 60.6 58.1/ 63.1

Weather Conditions


Ambient Temp (F) 74.8 68.6/ 81.2
Ambient RH (%) 53.1 12.2/ 228.9
Solar (w/m2) 194.5 0.0/ 857.0
Dewpoint (F) 40.7 -54.9/ 440.0
Sky Temp (F) 93.6 86.2/ 100.6
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