air drain

air drain

[′er ‚drān]
(civil engineering)
An empty space left around the external foundation wall of a building to prevent the earth from lying against it and causing dampness.

air drain

An empty space left around the external foundation wall of a building to prevent the earth from lying against it and causing dampness.
References in periodicals archive ?
The fans, dubbed Selective Inverted Sink (SIS), were developed by Uruguayan hydro-mechanical engineer Rafael Guarga and are sold here as the Shur Farms Cold Air Drain.
Compressed air drain cleaners are a power version of the force cup and are generally useful only on sinks.
Their movement through the soil also helps water and air drain through the gaps they leave behind.
Cheap hollow-tined aerators cost from around pounds 15 while the best, such as the Sisis Air Drain Fork - as used by most professionals - costs around pounds 50.
Experts said Katesbridge endures colder nights than many other parts of Northern Ireland due to being in a sheltered spot and shallow valley into which cold air drains down and collects.
Tree-free hollows in woodland areas are often referred to as frost hollows since cold air drains into these hollows and kills tree and shrub seedlings.
And all of our vineyards are on the banks of the Arroyo Seco River or Reliz Creek, where cool air drains to the water, protecting us from the frost.
Air drains toward the lake in the evenings and moves out toward the surrounding vineyards and pear and walnut orchards during the day.
Contract Awarded for air drains to control rising damp