City Of Chula Vista
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Commercial Building Operations and Maintenance


Air Conditioning Maintenance


Air Conditioning Performance


Air Temperature


Building Envelope Maintenance




Boiler Combustion Air Tune Up


Boiler Maintenance


Boiler Water Treatment


Chiller Maintenance


Cooling Tower Maintenance


Comfort Factors


Ducts and Dampers


Occupant Issues


Predictive Maintenance


Preventative Maintenance




Relative Humidity



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Comfort Factors
  • The human body loses heat primarily through convection, radiation and evaporation.  Air motion, relative humidity and the temperature of the air and of surfaces around a person play large roles in human comfort.

  • Clothing and activity levels also significantly affect people’s perceptions of comfort.  People working at high activity levels will accept conditions that sedentary people will not.  Because of individual differences (such as different clothing, activity levels, and personal tolerance), people will not always agree that 70 °F is a comfortable temperature.

  • All of these factors need to be considered when analyzing complaints about comfort in a building. Air temperature is only one piece of the puzzle.




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