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The fan-powered air terminal unit fans for these four zones were off during all tests.
An air terminal unit is a relatively easy device to select and specify.
The torque-driven design of ECM motors allows them to maintain a relatively constant flow rate in an air terminal unit, regardless of downstream static pressures (Kenty 2007).
To better predict the sound generated by air terminal units, the AHRI variable air volume terminals certification program now requires air terminal unit manufacturers to include end reflection in their cataloged discharge sound power levels.
This article reviews the characteristics and properties of some of the more common insulation materials specified for air terminal units. Also discussed are the commonly cited standards that are specified for air terminal unit insulation.
Even if a variable transformer is used to control the motor, instead of the SCR used by many air terminal unit manufacturers, the slip losses rise as the motor is turned down.
Use of Electronically Commutated Motors (ECMs) in Air Terminal Units. ASHRAE Transactions 113(1):334-41.
Also see the new ASHRAE Design Guide for Air Terminal Units, which is expected to be published and available at the 2018 ASHRAE Winter Conference in Chicago.
Procure air terminal units for headquarters building, Wenatchee; apparent low bidder: North Cascades Heating & Air Conditioning of Entiat.
Divided into seven vertical fire/smoke zones, the hospital utilizes its regular supply and return air terminal units for smoke management during a fire.