Air Amplifiers Overview

Vent, exhaust, cool, dry, clean – with no moving parts!

What are Air Amplifiers?

A simple, low cost way to move air, smoke, fumes, and light materials. Air Amplifiers utilise the Coanda effect, a basic principle of fluidics, to create air motion in their surroundings. Using a small amount of compressed air as their power source, Air Amplifiers pull in large volumes of surrounding air to produce high volume, high velocity outlet flows. Quiet, efficient Air Amplifiers will create output flows up to 25 times their consumption rate.

Air Amplifiers have no moving parts, assuring maintenance-free operation. No electricity is required. Flow, vacuum and velocity are easy to control. Outlet flows are easily increased by opening the air gap. Supply air pressure can be regulated to decrease outlet flow.

Both the vacuum and discharge ends of the Air Amplifier can be ducted, making them ideal for drawing fresh air from another location, or moving smoke and fumes away.

How Air Amplifiers Work

Compressed air flows through the air inlet (1) into an annular chamber (2). It is then throttled through a small ring nozzle (3) at high velocity. This primary air stream adheres to the Coanda profile (4), which directs it toward the outlet. A low-pressure area is created at the centre (5), inducing a high volume flow of surrounding air into the primary airstream. The combined flow of primary and surrounding air exhausts from the Air Amplifier in a high volume, high velocity flow.

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  • Vent welding smoke
  • Cool hot parts
  • Dry wet parts
  • Clean machined parts
  • Distribute heat in moulds / ovens
  • Ventilate confined areas
  • Dust collection
  • Exhaust tank fumes


Compared to Fans :
  • Compact, lightweight, portable
  • No electricity
  • No moving parts – no maintenance
  • Ends are easily ducted
  • Instant on/off
  • Variable force and flow
  • No RF interference

Compared to Venturis and Ejectors:
  • More air volume with lower compressed air consumption
  • Higher flow amplification
  • No internal obstructions
  • Ends are easily ducted
  • Meets OSHA pressure and noise requirements
  • Quiet

Adjustable Air Amplifiers are ducted to draw clean air for drying.

A Model 120024 4" (102mm) Super Air Amplifier cools an engine during dynamometer testing.

Air Amplifier Comparison

Air Amplifier Efficiency Sound Level Mounting Flange Flow Adjustment Temperature Rating Corrosive Applications
Super Air Amplifier High Low Yes With Shims 135°C 275°F No
Aluminium Adjustable Air Amplifier Medium Variable No Infinite (No Shims) 135°C 275°F No
Stainless Steel Adjustable Air Amplifier Medium Variable No Infinite (No Shims) 204°C 400°F Yes
High Temperature Air Amplifier High Low No With Shims 374°C 700°F Yes

Special Air Amplifiers

EXAIR will manufacture special Air Amplifiers suited to your specific application requirements.

This special Air Amplifier acts as a “booster” for a maxed-out dust collection system. The recessed groove on the suction side allows secure mounting to the existing dust collector intake tube and is held in place with set screws. The exhaust is easily ducted into the existing dust collection system or can be directed into a filter bag.

Another stainless steel version for flange mounting was developed as a fan back-up for exhausting flue gases from a furnace. In the event of a power failure, this special Air Amplifier can quickly evacuate the fumes that could be harmful to workers close by.

An in-line heater added to the exhaust of a stainless steel Adjustable Air Amplifier produces a high volume, concentrated blast of hot air suitable for curing, drying, activating adhesives and heat-shrinking. High air amplification puts much more airflow through the heater coils than would be possible with an ordinary fan or blower. The hot airstream can be felt over 3m (10’) away!

A PTFE plug was used with a stainless steel Adjustable Air Amplifier to help pull a sticky material through a process and prevent the material from depositing on the Air Amplifier.

This special Air Amplifier is used to draw polluted air through an activated charcoal filter.

Installation and Maintenance Guides

Adjustable Air Amplifier

248.59 KB

Super Air Amplifier

211.63 KB

Super Air Amplifier Shim Set

111.76 KB

Air Amplifiers PDF Brochure

CAD Drawings

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