Earth tube

Earth tube

Ventilation air intake tube, usually measuring 8 or more inches in diameter and buried 5 or more feet below grade. Earth tubes take advantage of relatively constant subterranean temperatures to preheat air in winter and precool it in summer. In humid climates, some earth tubes develop significant amounts of condensation during the summer, potentially contributing to indoor air quality problems.
References in periodicals archive ?
BUNTING reports it has developed a new design of Rare Earth Tube Magnet for use in removing fine iron from dry powders and says the Teardrop Tube Magnet retains the high surface magnetic field of 12,000 gauss, but the shape prevents fine powder from building up on the surface.
Each Drawer Magnet has three high-powered rare earth tube magnets, which can be removed from the front for cleaning.
A fourth air handler serving a 180 seat lecture theater is supplied outdoor air from a ground coupled earth tube system.
Magnet strength was also a key issue, as the new Grates would be replacing far weaker Rare Earth Tube Magnets supplied by another company.
The new RE5HP rare earth tube magnet, powered by the firm's proprietary combination of rare earth materials, Erium 3000, is claimed to surpass current tube magnet separation levels by 40 percent.
Metal Detector/Separator new rare earth tube magnet
Contract notice: Bespoke design, supply and installation of earth tube lighting.
Each drawer magnet had three high-powered rare earth tube magnets, which could be easily removed from the front for cleaning.
Earth Tube Preconditioning and the Psychrometric Chart
More particularly, Eriez will exhibit their new Megastrength Rare Earth (RE) Tube Magnet, which offers over 50% more pulling power on the surface of the tube than Standard Rare Earth Tube Magnets, thus ensuring outstanding performance in the removal of very fine iron or weakly magnetic contaminants, particularly important in processing applications involving foodstuffs.
There will also be a representative display of their range of magnetic separators for the removal of fine iron contamination, in wet or dry processes, including a magnetic plate, magnetic trap and magnetic grate - the latter being positioned within a transparent hopper and attached to a free-fall metal separator, as well as the Megastrength rare earth tube magnet.
Their new Megastrength Rare Earth Magnetic Tube now offers 60% more pulling power than traditional Rare Earth Tube magnets, they assure us.