"Watthour per Cubic meter"@en-us . . . . . "Watthour per Cubic metre"@en . . . . "W\u22C5hr/m\u00B3" . . "3600"^^ . "W.h.m-3"^^ . "The watt hour per cubic meter is a unit of energy density, equal to 3,600 joule per cubic meter."^^ .