IS 7896 : 2023

This standard specifies the outdoor (temperature and humidity) design conditions for air conditioning and heating or internationally accepted format, explained hereunder: a) Dry bulb (DB) temperature corresponding to 0.4 percent, 1 percent, and 2 percent annual cumulative frequency of occurrence and the mean coincidental wet bulb temperature (MCWB) (Summer - Cooling DB/MCWB); b) Wet bulb (WB) temperature corresponding to 0.4 percent, 1 percent, and 2 percent annual cumulative frequency of occurrence and the mean coincidental dry bulb temperature (Monsoon - Cooling WB/MCDB); and c) Dry bulb (DB) temperature corresponding to 99.6 percent and 99 percent annual cumulative frequency of occurrence and the mean coincidental wet bulb temperature (Winter - Heating DB/ MCWB).