The quantity of heat, in BTU's, that will flow through one square foot of material in one hour, when there is a 1 degree F temperature difference between both surfaces. Conductance can be expressed in other units as well. Conductance values are given for a specific thickness of material, not per inch thickness.
Conduction
(1) A transmission of electricity or heat, etc by the passage of energy from particle to particle. (2) Heat transfer between objects with different temperatures.
Conduction band
An energy band in a semiconductor in which electrons can move freely in a solid, producing a net transport of charge.
Conductive mortar
A tile mortar to which specific electrical conductivity is imparted through the use of conductive additives.
Conductive tiles
Tiles specially manufactured to absorb electrostatic charges and conduct them to ground, used in hospital operating rooms and computer installations.
Conductivity (thermal)
This is a positive constant, k, that is a property of a substance and is used in the calculation of heat transfer rates for materials. It is the amount of heat that flows through a specified area and thickness of a material over a specified period of time when there is a temperature difference of one degree between the surfaces of the material.
Conductor
(1) A substance that conducts electricity, sound, heat, etc. (2) Water pipe to a building. (3) Material that permits the passage of electricity.
Conductor head
A component used to direct water from a through-wall scupper to a downspout. Also known as a Collector Head.
Conductor pipe
A pipe used to lead water from the roof to the sewer.
Conduit
(1) Tube that houses electrical wiring, water, etc. (2) A flow path. (3) Alternately, a channel through which mortgage lenders distribute mortgages to the secondary mortgage market.
