Unit: British thermal unit (th) per degree Rankine

JSON
Identifier: UN985
Name: British thermal unit (th) per degree Rankine
Symbol: Btu_{th}.°R-1
Reference: https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8#B