Air Handlers are manufacturers of Heating, Ventilating and Air Conditioning Equipment for the building services industry

Air Handlers Celebrating 30+ Years of Success 1989 - 2024

Series VSI Single Low Profile Quiet Extract Fan Units

Series VSI

Low Profile Quiet Extract Fan Units


Acoustic Louvre…

As an option to an Attenuator or Attenuator Cowl we have an Acoustic Louvre as an alternative method of reducing the discharge air noise on external mounted weatherproof VSI models.




  • Low noise breakout
  • High sound  reduction casework  tested to BS EN ISO 10140-2  (2010)
  • Backward curved, low speed, EC fans
  • Low SFP
  • Tonal noise control
  • Matching attenuators
  • Weatherproof options
  • Attenuators/cowls and acoustic louvre options
  • Meets BB 93 Feb 2015
  • Fan motor isolators fitted as standard
  • Suspension brackets with vibration control available
  • Speed regulation 0>10 Volts
  • Variable volume control system - Vari Vol
  • Auto change over control system for duty and stand by operation on VTI units
  • Bottom and side access
Download brochure See Series VTI Twin Extract

Environmentaly friendly systems.

Provides good indoor air quality.

Recovery reduces energy costs.

High efficiency heat pump technology.

Hydrocarbon benign refrigerant available.

Product Development...

The Company is continually updating its products to comply with changing energy saving technologies, so the introduction of the VSI Range of extract units is based on changes in Fan technology, with the introduction of EC backward curved direct driven plug fans, with 0<10V speed control. Multi fan wall arrangements have been adopted to give higher performance with lower energy consumption.


The VSI cased extract range has been developed to meet the specific fan power requirements of Building Regulations, and additionally to meet Building Bulletin 93 noise requirement for schools and places of learning.

Acoustic Performance...

Extensive acoustic testing of casework construction has been carried out at both the companies testing facilities, and Salford University Acoustic Testing Laboratory. Acoustic tests were carried out on eleven double skin composite panel/frame systems, eight different triple and quadruple skin composite panel/frame systems, to BS. EN ISO 10140-2 (2010) which have all been certified as UKAS accredited.

BB93 feb 2015 acoustic reports noise reduction schools (PDF)

Air Handling Units Acoustic Insulation Performance Tests (Online Version)

Sound Advice for Ventilation Plant in Schools (PDF)

Sound Advice for Ventilation Plant in Schools (Online Version)

Enquire about our heating, ventilating and air conditioning systems

We supply and manufacture aircraft air handling, ECE ltd, barkell envirotec, VES, nuaire, flaktwoods, air source ventilation swegon, air handling systems, air handling unit manufacturers, AHU manufacturers, school air handling unit manufacturers, heat recovery air handling units, heat pump air handling units, low profile air handling units, low noise air handling units health care air handling units, packaged air handling units, modular air units, central station air handling units.

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