negative air unit
Bowman's Removable Filter.
Bowman's control panel.
neg air unit part
Double Air Inlet Adapter.
neg air unit detail
Double Air Inlet Adapter.


We locally manufacture custom parts and accessories to suit your unit.

As the designers and manufacturers of the Bowman Negative Air Units, any special requirements you need to suit your application can be forwarded to our design team. With your input we explore the most effective and practical solutions.


Call us on 02 6621 8184 or use the enquiry form on the right.

Fill in the specifications of the required part together with the unit serial number located on the instrument panel and we'll ship the replacement part the next day.


We stock a range of accessories. HEPA Filters and PRE-Filters to suit the standard units.

  •  Lengths of flexible ducting to suit the discharge spigot, directing the filtered exhaust air away from other working areas, air-conditioning inlets or breathing air compressors, etc.
  • Transition adaptors for mounting flexible ducting to the air inlet side of the Neg Air Unit. This becomes useful when the Neg Air Unit is located away from the work area.
  • Attguard manufacturers all forms of sheetmetal ducting, flue pipework, and general sheetmetal works, also agents for Eximo SpeedLock Ducting Systems