B.3.20 Air Conditioning Design Data
Outside dry bulb and wet bulb temperatures that are equaled or exceeded 2 ½ percent of the time, on the average, during the warmest 4 consecutive months ( Jun. thru Sep.) are given below. Air conditioning design shall be based on the 2 ½ percent dry bulb, wet bulb temperature.
Dry bulb temperature:
Wet bulb temperature:
Interior design temperature:
Dry bulb temperature
Wet bulb temperature
Heating and air conditioning system: shall be designed to provide a relative humidity of 50% + 10% or -10%.
Mechanical Systems: Economy cycle.
The air conditioning system except where room fan coil units are located, if located where the winter design dry bulb temperature is 35 degrees F (97 ½% basis) or less, shall be designed so that 100% outside air may be used in the system during those cool weather periods when the outside air temperature is sufficiently low to provide all the cooling needed, or reduce the load on the air conditioning refrigeration equipment. Use of the economy cycle in areas above 358 F shall be provided when it can be clearly shown that use of the economy cycle is cost effective.
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