refrigerant gas flow that a filter passes while maintaining a specified pressure drop across the clean filter. The flow capacity is expressed in lb/min (g/s) flow at a specified evaporator temperature and return gas temperature for the given refrigerant.

tube specially shaped to increase the discharge velocity of the fluid.

configuration of the direction and velocity of a flowing fluid 

velocity (local or average) of a fluid in a pipe, duct, or canal, or from an orifice.

1. passage through which flue gases pass from a combustion chamber to the outside atmosphere.

2. conduit between the flue outlet of the furnace and the integral draft diverter, draft hood, barometric draft regulator, vent terminal, or any other point of draft relief.

that portion of an appliance designed for attachment of a chimney, vent connector, or a draft hood.

chamber designed to capture the products of combustion and accompanying excess air.

any point (e.g., an openable window, an occupied terrace) at which a person in a nearby building can become exposed to flue gases emanating from a chimney. Receptor locations include intakes of air-conditioning and ventilating systems.

conduit or passageway for conveying flue gases to the outer air.