Refrigeration and Air Conditioning
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

25°C DBT and 40% RH
22°C DBT and 60% RH
20°C DBT and 80% RH
25°C DBT and 100% RH

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Refrigeration and Air Conditioning
A good refrigerant should have

High latent heat of vaporisation and low freezing point
High operating pressures and low freezing point
Low C.O.P. and low freezing point
High specific volume and high latent heat of vaporisation

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