A $BTU_{IT}$, $\italic{Foot per Square Foot Hour Degree Fahrenheit}$ is an Imperial unit for 'Thermal Conductivity', expressed as $Btu_{it} \cdot ft/(h \cdot ft^2 \cdot degF)$.
British thermal unit (international table) foot per hour Square foot degree Fahrenheit is the unit of the thermal conductivity according to the Imperial system of units.
British Thermal Unit (international Definition) Foot per Square Foot Hour Degree Fahrenheit
qudt:exactMatch: unit:BTU_IT-FT-PER-HR-FT2-DEG_F