An air heater in which air is blown over electric resistance heating coils.

Occupational Safety and Health Administration. A regulatory office of the U.S. Department of Labor.

The regular periodic arrangement of atoms or molecules in a crystal of semiconductor material.

The direction, with respect to magnetic north, from which the wind is blowing. Distinguish from true wind direction.

The standard method for calculating residential cooling loads developed by the Air-Conditioning and Refrigeration Institute (ARI) and the Air Conditioning Contractors of America (ACCA) based largely on the American Society of Heating, Refrigeration, and A ...

The price paid for goods or services at the time of a transaction; a price that has not been adjusted to account for inflation.

A cleat designed to hold a line in place without slipping. It consists of two narrowing jaws with teeth in which the line is placed.

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Pyrheliometer based on the comparison of the heating of two identical metal strips, one exposed to radiation, the other to a joule effect.

Board, bearing instructions, that comes to a wrecked ship with a life-saving rocket line.

The most common type of sail used today, a triangle-shaped mainsail defined by the mast and one horizontal boom perpendicular to the mast.

A small boat intended to be used only for short sails or racing.

A fabric cone attached to a metal ring and used to indicate wind direction. often at airfields.

An absolute temperature scale. ((

A device that releases pressure within a radiator when the pressure inside exceeds the operating limits of the vent.

A recording weight barometer.

A pressure-plate anemometer consisting of a plate which is free to swing about a horizontal axis in its own plane above its center of gravity. The angular deflection of the plate is a function of the wind speed. This instrument is not used for station mea ...

A wall to prevent the spread of fire; usually made of non-combustible material.

A type of weld cracking that usually occurs below 203