Heat transfer in loose-fill attic insulation was investigated in a large-scale model of a ventilated attic built in a climatic chamber. The particular aspect of this study was heat transfer by convection and its effect on heat losses through the attic floor. It was shown by thermal resistance measurements that the measured and calculated thermal resistance of the attic floor is within the margin of error. Air movements were detected in the insulation, sufficient to cause a decrease in the thermal resistance of the attic floor. Ventilation was not found to cause a decrease in temperature at the top of the insulation.
Convection in loose-fill attic insulation - simulations and large-scale measurements.
in: USA, Atlanta, ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.), 2001, ISBN 1-883413-96-6, proceedings of a conference held Sheraton Sand Key Resort, Clearwater Beach, Florida, USA, 2-7 December 2001, CD ROM form