Passive Chilled Beams

Other Literature/Studies
Passive chilled beams rely on the natural buoyancy of the air to generate air circulation through the fins of the coil. Passive beams are used in cooling applications only.

Passive systems are for space conditioning only and do not provide fresh air. They are generally used in low/medium load applications or as perimeter cooling units.

How does it work?

The passive beam typically hangs below the ceiling to allow for warmer air that has risen due to natural buoyancy to cool across the coils. The passive beam discharges the conditioned air vertically, which is why they typically are positioned in corridors and not directly above the work spaces. The amount of air that is discharged through the beam is equal to the capacity of the beam. It is defined by the temperature difference between the room air and the chilled water supply through the coil. As the air goes through the coil the temperature decreases and pressure increases, which causes it to drop into the space. Generally, delta T is kept between 16 to 18 degrees F to avoid any draft below the beam.

Beam Components:

  1. Cooling Coil
  2. Casing (Optional)
  3. Brackets for mounting/hanging

We offer additional accessories: gripple hangers, dew point sensor, nipples, hoses.
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