I'm using Mathematica 9.0.1. Sorry for using an image, but pasting code messed up the output formatting.
I'd like to represent 25 Btu/(hr ft F).
All units are spelled correctly as identified in the second attempt... not sure what is going wrong in the first attempt?
I've also tried: "DegreesFahrenheit" "DegreesFahrenheitDifference" "BritishThermalUnitsIT"
No luck. I've seen other posts where people used the Wolfram Alpha capabilities to "interpret" which units were used... I hope I don't need internet connectivity for this simple task?