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Thermal Comfort

Must include consideration of:

  • Sensible (dry bulb) temperature (generally speaking 68-75F in winter, 73-79F in summer)

  • Relative humidity (RH) - optimum range typically considered 30-60%

  • Radiant heat transfer - large areas of glass; works both directions

  • Air speed - assumes 50 fpm

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Must also consider:

  • Clothing level - garment insulation values, “clo”; range is 0.4 – 1.7

  • Activity level - estimated in metabolic units, “met”

  • assumes occupants are primarily sedentary (£ 1.2 met)

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