<http://schema.org/description>
"Off-peak cooling is a new innovation that uses electricity to produce blocks of ice at night when demand is low. But how does the air stay cool enough to provide relief at the hottest time of day?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://home.howstuffworks.com/home-improvement/heating-and-cooling/off-peak-cooling-systems1.htm>