The sensible heat factor during the heating and humidification process is given by (where h₁ = Enthalpy of air entering the heating coil, h₂ = Enthalpy of air leaving the heating coil, and hA = Enthalpy of air at the end of humidification process)

• A. (h2 - hA)/ (h1 - h2)
• B. (hA - h2)/ (h1 - h2)
• C. (hA - h1)/ (h2 - h1)
• D. (h1 - h2)/ (hA - h2)

Answer: (C)