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Thermac's equipment development team design and manufacture a range of filtered air mover/extraction units (NPUs) which have proven to be very popular with contractors through the U.K.

These units are available to hire or purchase as new machines from stock.  Our air movers have a simple, easy to use operation which hides the sophisticated and high quality parts used in their construction, making them highly efficient and reliable.  

These air movers are built from robust, smooth polypropylene plastic which makes them:

  • Lightweight
  • Non-corrosive
  • Electrically safe
  • Chemical resistant
  • Durable
  • Easy to clean 


They contain HEPA filters tested to an efficiency of 99.997% and their overall performance provide the user the confidence that these machines meet today's stringent regulations.

Each new machine comes with 12 months limited warranty and 6 months D.O.P. and electrical test certificates and has the back up of Thermac’s service support department and unique, computerised recall system.

Thermac also stock a comprehensive range of flexible ducting and pre filters for use with these machines. 

Thermac’s new Digital Flow Meter provides the user with a clear display of the actual real-time airflow performance of each Negative Pressure Unit – gives greater accuracy when ensuring the correct negative pressure is maintained within an enclosure.


The Meter highlights variations in airflow when, for example, filters are loaded, ducting is fitted or when roving heads are used for localised extraction.


• Clear Digital Display:

- Volume (m3/hr, m/s, cfm or l/s)

- Pressure (Pa, kPa, mbar, inWC or mmWC)

• Conforms to:

- EMC Directive 2004/108/EY3

- RoHS Directive 2002/95/EY

- IP54

All new Thermac Negative Pressure Units can be supplied with the Digital Flow Meter – we can also retro-fit the device to any make of negative pressure unit.