GRD
This is an undesired current of air felt on the skin surface, caused by high air velocity.
What is a draft?
This unit of measurement describes sound pressure on a logarithmic scale.
What is a decibel (dB)?
This is the water temp to avoid condensation on a beam coil.
2-3F above dew point (or 57-58F)
This is a common device used to reheat air leaving a terminal unit.
What is a Hot Water or Electric Reheat coil?
FFU stands for this.
What is Fan Filter Unit?
This is the ASHRAE Standard that provides methods to quantify thermal comfort.
What is ASHRAE Standard 55 – Thermal Environmental Conditions for Human Occupancy?
This single-number rating describes the sound blocking ability of a partition, door, window or panel, and is abbreviated as "STC".
What is Sound Transmission Class?
This is the recommended face velocity on a displacement diffuser
40 fpm
This is one major source of noise generation in a Terminal Unit.
What is the Primary Air Damper OR Fan Assembly?
This main feature can be found in the Ultrasuite, but not the Hospital Grade Plenum (HGP) system
What is LED lights
3 straight duct diameters
This is a weighted, single number rating that describes the perceived loudness of indoor noise.
What is Noise Criterion (NC)?
This is the ventilation effectiveness for ceiling heights above 18ft
1.5
This is the difference between duct Total Pressure and Static Pressure, and is measured by Cross Flow Sensors.
What is Velocity Pressure?
This motor program is used when a fan filter unit is ducted and there is an upstream VAV device
What is the Constant Torque motor program?
This is percentage the throw will reduce by if there is no coanda effect?
What is 30%
These two details about the occupied space are required to calculate room noise deductions for an acoustic analysis.
What are the room volume and surface absorption? (i.e., are the room surfaces absorptive or reflective?)
These are a recommended method of providing heating in an underfloor or displacement application to avoid airflow disruptions
What are radiant panels, fin tube enclosures, or natural convective heaters (Also accepted RPMs, RPLs, LEs, DLEs, LNTs)
These are the two paths noise can travel to escape from a terminal unit.
What are 1) Radiated Noise and 2) Discharge Noise?
The Ultrasuite with no HEPA has a minimum plenum height as low as this number
What is 10"?
This is the type of diffuser least impacted by poor inlet conditions.
What is SCD/SPD/Radial Diffuser?
ASTM E477-20, which tests the performance of noise control devices, requires noise to be measured in this type of room.
What is a Reverberant Room?
Active Chilled beams work in the same way as these
What are induction units
This is typically the MINIMUM differential pressure of a Cross Flow sensors that can be used for a reliable flow rate measurement.
What is 0.02 in w.g.?
The BFC-ST can be ordered in AIO with this model code
What is FFUCS?