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An HVAC component that uses outside air, under suitable climate conditions, to reduce required mechanical cooling. When the outside air’s enthalpy is less than the required supply air during a call for cooling, an economizer allows a building’s mechanical ventilation system to use up to the maximum amount of outside air. enthalpy
The list typically is Section C of the Uniform Contract Format and consists of a series of individual data items, each of which is recorded on a Data Item form (DD Form 1423) containing the tailored data requirements and delivery information.
National Stock/Supply Code for Manufacturers: An older name for "CAGE code". Also FSCM (Federal Stock/Supply Code for Manufacturers). N&T or N/T or NT: normalized and tempered: A form of heat treatment in which the metal is first normalized (stress-relieved) and then tempered. Compare H&T. NTS: not to scale: See also Engineering drawing > Scale.
The following is a list of trades in construction. Bell hanger installs mechanical and electrical bell systems; Boilermaker, works in nuclear, oil and gas industry, shipyards, refineries, and chemical plants, on boilers, pressure vessels, and similar equipment. Carpenter, a craftsperson who performs carpentry, building mainly with wood. [1]
Members of ASHRAE receive the current volume, in both print and CD-ROM form, each year as a basic membership benefit. An enhanced electronic version, known as ASHRAE Handbook Online is a web-based version updated annually that contains the four latest volumes as well as extra content such as calculations, demonstration videos, and spreadsheets.
ASHRAE was founded in 1894 at a meeting of engineers in New York City, formerly headquartered at 345 East 47th Street, and has held an annual meeting since 1895. [4] Until 1954 it was known as the American Society of Heating and Ventilating Engineers (ASHVE); in that year it changed its name to the American Society of Heating and Air-Conditioning Engineers (ASHAE). [5]
Sometimes AHUs discharge (supply) and admit (return) air directly to and from the space served without ductwork [4] Small air handlers, for local use, are called terminal units , and may only include an air filter, coil, and blower; these simple terminal units are called blower coils or fan coil units .
RTS/CTS (request to send/ clear to send) may refer to: Request to send and clear to send, flow control signals RS-232 RTS/CTS, today's [as of?] usual RS-232 hardware ...