4901 Kesslersville Road Easton, PA 18040
The outdoor temperature at which total heat losses from conditioned spaces, equal internally generated heat gains.**
A heat energy measurement unit. One BTU is the heat energy required to raise the temperature of a pound
Secondary bearing for the piston rod on a valve that is pneumatic or hydraulically actuated. Also called a “drive
A weld formed by placing two pieces of material parallel to one another (“butted” together). Typically the preferred method
A valve consisting of a pair of semicircular plates that are attached to a spindle across a pipe and
Load for which an apparatus is rated (electrical generator or thermal system) at specific conditions.**
The formation of vapor pockets (cavities) in a liquid. Cavitation is a phase transition between the liquid and the
Devices that provides the primary force, to distribute and recirculate hot and chilled water, in a variety of space-conditioning
The outdoor temperature the designer selects, as the point of changeover from cooling to heating by the HVAC system.**
