An ordinary cremation consumes valuable energy and consigns the body to flames, which has unpleasant connotations of hellfire and damnation. In 1983 Kenneth H. Gardner invented a greener, more uplifting alternative — the corpse is elevated through the roof and then cremated by concentrated solar energy.
A temperature of about 1,700° F. is required to provide incineration and a total of about 3,000,000 BTU’s is required to consume a corpse. Thus, at a supply rate of about 1,000,000 BTU/hour, cremation would take about three hours. A concave mirror-reflector bowl similar to the steam-producing Crosbyton hemisphere in Lubbock, Texas is considered a suitable collector. At 65 ft. diameter, a bowl of this type can produce approximately 1,000,000 BTU/Hr. under full sunshine conditions from mid-morning to mid-afternoon.
Gas burners are still available “for auxiliary use during inclement weather and/or when it is desired to expedite the cremation process.”