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dead-air space

dead-air space

7.7
A space with no air movement between layers that helps keep heat in or out
  • noun
  • /ˈdɛd ɛr speɪs/
  • Specialized
translation icon : espacio de aire muerto
  • The attic has a lot of dead-air space.

Examples

  • The walls are constructed with a dead-air space between the layers for extra insulation.

  • A large dead-air space in the attic can help regulate the temperature of the house.

  • Make sure there is no dead-air space behind the refrigerator, or it won't cool efficiently.

  • Many buildings contain dead-air spaces for insulation.

  • The engineer explained that the dead-air space between the windows helps keep the house warm in winter.

  • Installing insulation in the dead-air space of the attic can significantly improve energy efficiency.

  • Avoid placing furniture in a dead-air space, as it can hinder proper airflow and ventilation.

Antonyms

Having fresh air moving into and out of a room

How Ventilated

open air
8 1.0
venthole
  • Specialized
6.8
dead-air space
  • Specialized
7.7
airtight
19 3.9

Surface Forms

Morphology

dead-air + space

The phrase is transparently compositional: 'dead' (inactive/stagnant) + 'air' (the gas) + 'space' (an area) yields an area of stagnant or non‑circulating air. Although used in technical contexts, this adjective–noun combination follows normal English compounding patterns, so a B1 learner who knows the constituents can infer the meaning.

Etymology

Dead-air space comes from the simple image of a small pocket of air that is dead — not moving — inside a space. That still air traps heat and stops air from moving, so people began to call any area with no airflow a 'dead-air space', which is why the phrase means an area with no air circulation.