{"aspect_id":"AS128","aspect_name":"heat-density","aspect_reference":null,"aspect_symbol":null,"name":"heat-density British thermal unit (th) per cubic foot","scale_id":"SC942","scale_name":null,"scale_symbol":null,"scale_type":"ratio","symbol":"None Btu_{th}.ft-3","unit_id":"UN983","unit_name":"British thermal unit (th) per cubic foot","unit_reference":null,"unit_symbol":"Btu_{th}.ft-3"}