{"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":null,"unit_id":"UN1044","unit_name":"degree Fahrenheit second per British thermal unit (th)","unit_reference":"https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8#D","unit_symbol":"\u00b0F.s.Btu_{th}-1"}