air terminal unit


Also found in: Acronyms.

air terminal unit

In air-conditioning, same as terminal unit.
References in periodicals archive ?
Since fan-powered air terminal units typically have much higher airflows than this, the magnitude of the effect as measured is considered very small.
One of the most obvious differences between an ECM and a PSC motor in an air terminal unit is that, once set, the airflow remains constant over a range of downstream static pressures.
Another disadvantage of using ECM motors in an air terminal unit application is if there is a catastrophic incident and one or more of these motors fail due to unforeseen circumstances, these motors cannot be replaced by generic off-the-shelf solutions.
The setup consisted of a series (constant volume) air terminal unit, sufficient downstream duct to ensure uniform flow, and a flow measuring station.
This forces the air terminal unit to continually run in a turndown motor condition with primary supply air choked off, requiring that additional makeup air be supplied from the plenum through the induction port.
The greatest advantage is seen at turndown conditions, with the operating cost of the ECM-driven air terminal unit being 70% less than the cost for the PSC-driven air terminal unit.
Electronically commutated motors (ECM) have recently seen applications for fractional horsepower motors in the use of series and parallel air terminal units.