Sheetrock that changes

Sheetrock has been created that can help make building walls more environmentally friendly for heating and cooling a house. The Sheetrock is made with microscopic capsules filled with paraffin wax that changes from solid to liquid when the temperature goes over 73 degrees. As the wax melts it absorbs heat and cools the room similar to how melting ice dissipates and cools water. At night when the temperatures drop below 73 degrees the wax hardens which releases heat back into the room. This new product called phase-change drywall is produced by national gypsum and might be produced commercially if there is enough demand.