thermal performance, definition of

Thermal Performance

Thermal Performance refers to how well a structure responds to changes in external temperature during the daily and seasonal cycles. Typically this is in relation to the thermal conductivity of materials or the assemblies of materials.

You want a property to maintain a steady comfortable temperature inside whilst incurring as little energy costs as possible; this is often best achieved by first improving the thermal performance of the property by providing high levels of insulation (high R-Value, low U-Value) on all surfaces and adopting passive solar techniques.

The thermal behavior of a structure is also affected by conditions such as:
  • seasonal and temperature changes,
  • daily diurnals (the difference between highest & lowest temperatures in a day),
  • the amount of solar gain and structural shading,
  • incoming and outgoing heat radiation,
  • water and moisture absorption,
  • air movement,
  • infiltration,
  • pressure differences, etc

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Related Tags: passive solar, solar heating, solar cooling, sustainable design, architecture

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