Bos Cleantec
Bos Cleantec Suomeksi Bos Cleantec In English

Negative Air Machine (Large)

The BOS Clean negative air machines are designed and intended for the purpose of air quality improvement and air purification during construction and renovation projects. The  machines have been determined by laboratory tests at VTT Technical Research Centre of Finland Ltd. Combined with HEPA 13 filters recommended by the manufacturer, the machines are suitable for asbestos work as defined in the newly issued Finnish Government Decree on the safety of asbestos work. 

The BOS negative air machines can be used for demanding asbestos removal work, mould projects and dust control of dry air.

BOS Clean Large is suitable for creating negative pressure in medium- to large-sized homes and spaces. It is lightweight and mounted on large, smooth-moving casters (Ø125 mm) for enhanced mobility. This durable machine is suited to heavy-duty use and can be moved over obstacles. 

Key characteristics

  • Approved for asbestos work

  • Lightweight for enhanced mobility, easy to use

  • A choice of filter combinations:

  • HEPA H13 or HEPA H14 (EN 1822), bag filter F7, cassette filter G4 or pre-filter pad G4

  • Safety locking device for HEPA filter

  • Heavy-duty rear casters (Ø125 mm)

  • Lockable swivel front casters

  • Carrying handles on the sides

  • Hour meter for maintaining a machine card

  • Differential pressure gauge for monitoring filter condition

  • Easy-to-change pre-filter 


Max. air flow without filter 4800 m³/h
Air flow with HEPA filter 3200 m³/h
Static pressure 1300 Pa
Operating voltage / frequency 200 - 277 V 1~ 50 / 60 Hz
Motor / W / A 1,44 kW / 5,2 A
Fuse A 10 A
Power cord ( 3G 3*1,5 mm²) 2 m
Operating switch Yes
Speed control Yes
Sound/noise level < 73 dBA
Material Marine aluminium
Safety locking device for HEPA filter Yes
Intake/outlet Ø 300mm
Outlet duct Lay-flat or flexible duct
Dimensions (height*width*length) 660*550*1050 mm
Weight without filters 36 kg
IP- rating 55
Carrying handle(s) Yes
Wheels Yes
Indicator Yes
Pressure differential meter Yes
Hour meter Yes