{"aspect_id":"AS166","aspect_name":"thermal-impedance","aspect_reference":null,"aspect_symbol":null,"name":"thermal-impedance degree Fahrenheit second per British thermal unit (th)","scale_id":"SC1003","scale_name":null,"scale_symbol":null,"scale_type":"ratio","symbol":"None \u00b0F.s.Btu_{th}-1","unit_id":"UN1044","unit_name":"degree Fahrenheit second per British thermal unit (th)","unit_reference":null,"unit_symbol":"\u00b0F.s.Btu_{th}-1"}