Compressor Hire Available

air compressor and compressed air hire in London, bedfordshire, Cambridgeshire, essex, Hertfordshire, Norfolk, Suffolk, derbyshire, lincolnshire, Gloucestershire, Leicestershire, Northamptonshire, nottinghamshire, Sussex, oxfordshire, surrey. We are also offering compressed air dryer hire, dental compressor hire and mobile compressor rental



Available with i-Hoc (Rotary Dryer)

Fixed Speed

55-2 | 75-2 | 90-2 | 120-2 | 130-2

Variable Speed

90-2 SFC | 120-2 SFC | 130-2 SFC


Available with i-Hoc (Rotary Dryer)

Fixed Speed

140 | 180 | 220 | 260 | 290

Variable Speed

180 SFC | 220 SFC | 260 SFC | 290 SFC


Outstandingly efficient compressed air drying for Oil Free Rotary Screw Compressors

i.HOC stands for “integrated Heat Of Compression dryer”. This means that the heat, which is a by-product of air compression, is used to regenerate the desiccant. The heat is essentially available for free, as no additional energy is required to power the drying process. The result: reliable air drying with maximum efficiency and lower energy costs - even for varying quantities of air. Compared to systems already on the market, i.HOC takes advantage of the entire quantity of available heat. This means that low pressure dew points can be reliably achieved even in challenging conditions, such as low pressure, high temperature or low load operation.

This is made possible by a high-efficiency radial blower with variable control, which serves two main purposes: to compensate for the pressure lost in the drying process and automatically adapt the drying process to changing operating conditions. Full-flow regeneration, together with an additional patented process, ensures dependable drying, without additional electrical heat sources or coolers, even at ambient temperatures as high as 45 degrees Celsius. The integrated Sigma Control 2 compressor controller perfectly manages the entire process, controlling the radial blower and drum drive of the i.HOC integrated rotation dryer.

  • Integrated i.HOC dryer option available in air-cooled or water-cooled units
  • Unit rated power from 37 kW to 200 kW
  • Unit flow rates from 3.3 m³/min to 30 m³/min
  • Integrated SIGMA CONTROL 2 (SC2) compressor controller (SFC model versions)
  • Available integration with - Air Cooled Compressors in the (CSG-2 & DSG-2 series) and the Water Cooled Compressors in the (DSG-2 series).

Regardless of the operating conditions or the required air delivery volume, the controller automatically adjusts accordingly to ensure reliable and consistent production of pressure dew points down to minus 20 degrees Celsius, and under special conditions down to as low as minus 30 degrees Celsius. The logical, compact system design not only enables straightforward and low-cost installation, but also offers optimal serviceability features and a relatively small footprint. Moreover, the Kaeser i.HOC system provides impressive heat recovery rates. The full-flow regeneration process with water-cooled dry-running rotary screw compressors allows the compressor cooler to be used for heat recovery purposes. This system eliminates the heat losses associated with existing systems caused by separate dryer coolers – and saves the cost of energy that would have to be expended to produce process heat or to provide space heating.


  • Sub-zero pressure dew points even in high ambient temperatures: 
    Thanks to its extraordinary regeneration potential, the i.HOC delivers below-zero pressure dew points even with high cooling medium temperatures.
  • Pressure dew point stability even with variable flow rates: 
    The pressure dew point remains stable even with low compressor load – no partial-load compensation required.
  • Effective drying & heat recovery: 
    i.HOC uses the heat exchangers of the second compression stage, which have been optimised for heat recovery, as regeneration air.


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© 2021 Chelmer Pneumatics & Compressors Ltd.

Chelmer Pneumatics & Compressors Ltd is a company registered in England and Wales with company number 2190542. Registered office: Bellcroft, Eastways, Witham, Essex CM8 3YU.

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