An axial flow fan mounted in a section of duct to move conditioned air.
Duct tape
This (initially) sticky tape is unfortunately the most common material used to seal duct connections. Care must be taken when it's applied. For effective sealing, the surface it is applied to must be clean--free of dust, dirt, oil, or other substances. Duct tape has a tendency to lose adhesion with age, especially when used on ducts in unconditioned spaces.
Ductile
Workable. Material, as metal, able to be stretched or hammered thin without breaking, something not brittle, easily molded.
Ductility
The property of a material, often metal, which allows it to be formed and reformed, stretched or hammer, etc.
Ductwork
Network of ducts that has been installed, usually as part of an HVAC system. Ductwork is typically constructed from sheet metal.
Ductwork, preformed
Ductwork which has been manufactured and shaped in a factory to use in special places where needed.
Due process
The course of legal proceedings established by the legal system of a nation or state to protect individual rights and liberties.
Due-on-sale clause
Language in a mortgage stating that a loan must be fully repaid upon the sale of a home.
Dull
(1) Not brilliant. Dim. Not Shiny. (2) Not pointed or sharp. Blunt.
