Negative Air Unit

The Bowman’s Negative Air Unit is essential equipment for the workplace where the removal of hazardous dust like respirable dust is essential for the health of employees.
Our negative air units are built to last with a Powerful Centrifugal Fan assembly housed in a powder-coated galvanised steel cabinet with an aluminium lightweight frame that provides effective extraction of dust particles.

Filters
All units have both Pre-Filters and HEPA filters.
HEPA filters provide filtration of smaller particles than traditional filters. The filters comply with AS4260:1997 and are 99.99% efficient at 0.3 microns.

Auto Alerts
An audio/visual alarm warning both High and Low pressure, indicating when the filters need servicing or replaced.

Easy Placements
The units are fitted with steel drop handles and swivel wheels for easy moving and are conveniently sized to fit through standard doorways.

Negative Air Units Specifications

Our units are made of powder-coated galvanised sheet steel cabinets and aluminium square tube frames.
They boast a centrifugal fan assembly with a 240volt electric motor.
They have a fan speed control system to allow tuning of the exhausted air volume.
There is a Magnehelic gauge that measures and displays the actual air pressure across the filters.
The audio/visual alarms, warning for both High and Low pressure, indicate when any of the filters are blocked, damaged or not fitted correctly.
To avoid any downtime, the alarms have a backup battery.
There is also an alarm test button for both the audio and visual alarm systems and a power “On” indicator light, so it is easy to see if it is working.
The main filter assembly has airtight housing and galvanised steel mesh safety screen to protect the HEPA filter.
Easily accessed HEPA Filter assembly with the new generation HEPA Filter support brackets, allows safe transport of the HEPA Filter, which is securely mounted within the Negative Air Unit.
The Pre-Filter has a simple holding frame assembly.
There are steel drop handles to assist in the easy lifting of the unit and trolley wheels for easy movement into position.
The standard unit size of 670mm high x 670mm wide x 850mm long, allows this compact unit to pass through and fit in standard doorways.
A 330mm x 290mm rectangular spigot discharge with a mesh screen, suitable for the use of a flexible duct, is also available to discharge the filtered air to open areas.
The units come with an Operation manual and Operation transfers are affixed to the steel cabinets.

Usage of Negative Air Units

– Asbestos removal
– Floor sanders
– Mining
– Welders and fabricators
– Cement dust extractions
– Working with organic dust
– Confined space applications
– Wood dust
– Hazardous waste removal
– Construction industry
– Demolition industry
– Laboratories
– Defence Industry

Negative Air Unit