The $\textit{BTU (TH) Foot per Square Foot Hour Degree Fahrenheit}$ is an Imperial unit for 'Thermal Conductivity' defined as:
$$Btu_{th} \cdot ft/(hr \cdot ft^2 \cdot degF)$$.
The $\textit{BTU (TH) Foot per Square Foot Hour Degree Fahrenheit}$ is an Imperial unit for 'Thermal Conductivity' defined as:
$$Btu_{th} \cdot ft/(hr \cdot ft^2 \cdot degF)$$.