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Indoor Comfort Temperatures vs. Outdoor Temperatures

Recommended indoor comfort temperatures vs. outdoor temperatures.

Recommended indoor comfort temperature versus outdoor dry-bulb temperatures are indicated below.

Indoor Comfort Temperatures vs. Outdoor Temperatures
Outside Dry-Bulb Temperature
Inside Temperature (oF)
Dry-BulbWet-BulbDew PointEffective Temperature
100 82.5 69.0 62.3 76.0
90 79.5 66.5 59.5 73.6
80 76.7 64.0 56.6 71.3
70 74.0 62.0 54.5 69.0

outdoor and indoor effective temperature diagram

outdoor and indoor effective temperature diagram

Example - Recommended Indoor Temperature

With an outside dry bulb temperature of 30 oC, the diagram above indicates the the recommended inside dry bulb temperature should be approximately 26 oC and the recommended inside wet bulb temperature should be approximately 17 oC

From the Mollier diagram this corresponds to relative humidity approximately 40% with humidity ratio - x - 0.0085 kgh2o/kgdry_air.

Related Topics

  • Air Conditioning Systems

    Design of Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort.
  • Air Psychrometrics

    Moist and humid air calculations. Psychrometric charts and Mollier diagrams. Air-condition systems temperatures, absolute and relative humidities and moisture content in air.

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