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VariTrane® VAV Series Fan Powered Terminal Units

Models VSCG, VSWG, VSEG, LSCF, LSWF, LSEF

Reduce noisy airflow and equipment sound with VariTrane VAV Series Fan Powered Units

Overview

Ideal for commercial buildings with open ceiling designs.

The VariTrane Series Fan Powered Terminal Units offer reliability, energy efficiency and superior acoustics.

  • Airflow performance ranging up to 2500 CFM.
  • Available Primary Air Inlet Sizes: 4-in. to 16-in., 8 in. x 14 in. rectangular
  • Available in both low height and standard height configurations

  1. Ultra-Quiet

    VariTrane Series Fan Powered Terminal Units are designed for acoustically sensitive jobs and open ceiling concepts. The factory installed integral suppressor attenuator provides an unparalleled, industry-leading solution to minimize radiated noise.

  2. Energy-Saving Fan Control

    VariTrane Series Fan Powered Terminal Units reduce energy consumption and operational costs during off-peak times with its EC motor, which provides variable fan speed and airflow based on thermal comfort demand.

  3. Factory Commissioned Controls for Superior Performance

    Factory mounted, wired and tested BACnet communication controls are pre-programmed with tested and proven control sequences for optimal performance. Assuring seamless integration with Building Automated Systems.

Product Information

  • 4-row hot water coils maintain heating capacity with lower entering water temperatures from electrified heating systems. (A plus for meeting building decarbonization goals.)
  • Integral Suppressor attenuator provides market-leading acoustical performance.
  • ECM with variable fan airflow control (ECV) offers tight temperature control, reduced operational cost and part load acoustics.
  • Air-Fi® Wireless Communication eliminates wiring costs and reduces startup/commissioning time.
  • The universal right- or left-hand connection design allows handing to be determined during installation.
  • UL-60335 Listed
  • AHRI 880/885 Certified Acoustical Performance
  • Airflow performance ranging up to 2500 CFM
  • Available Primary Air Inlet Sizes: 4-in. to 16-in., 8-in. x 14-in. rectangular
  • Low height (10.5 in.) and Standard height (20 in) casing options
  • Standard top and bottom access panels for improved accessibility to internal components
  • 1" total static pressure capability supports MERV-8 and MERV-13 high-efficiency filtration 
  • LEED wrap prevents contamination during the construction phase

Product Literature

Brochure

Catalog

Installation Operation Maintenance (IOMs)

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FAQs

Your fan powered terminal unit questions, answered.

Series fan-powered terminal units are used commonly in VAV zones that require heat during occupied hours and design higher supply airflows during all conditions.

The terminal unit fan is in series with the central fan. Primary air from the central fan always passes through the terminal unit fan.

The local series fan within the terminal unit operates whenever the unit is in the occupied mode. The fan can deliver either a constant or variable volume of air to the zone.

As the zone requires less cooling, the primary air damper closes. As the primary air damper closes, the air mixture supplied to the zone contains less cool air and more warm plenum air. Remote heat or terminal reheat can provide additional local heating.

Series fan-powered terminal units are also useful in low supply air temperature systems, since the terminal unit fan can be sized so that warm plenum air is always mixed with low temperature supply air. This raises the supply air temperature to an acceptable distribution level and reduces condensation potential.

With the VAV Parallel Fan-Powered Terminal Units, the terminal unit fan is in parallel with the central unit fan; no primary air from the central fan passes through the terminal unit fan. Fan is only used when needed, making the unit more energy efficient.

With the VAV Series Fan-Powered Terminal Unit, terminal unit fan is in series with the central fan. Primary air from the central fan always passes through the terminal unit fan. As the fan is always on, Series Fan Powered Units may be a more optimal choice where acoustics is a top concern, as the noise level is constant.

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