Fan-powered respirator with reusable hood, helmet or visor

Last reviewed on 04/08/2014 10:18

Fan-powered respirator with reusable hood, helmet or visor


  • This type uses a motorised fan to pull air through filters. It does not depend on wearer's breathing. However if the motor fails, the wearer must remove the facepiece before exiting to a safe place
  • Hoods cover the whole area of the face and come in different shapes and sizes
  • Reusable hoods can be made from a variety of materials
  • They can be cleaned and reused many times, as recommended by the manufacturer
  • Hoods can be fitted with particle filters, gas filters, vapour filters or a combination of gas, vapour and particle filters
  • Filters may be located within the hood or in a back pack
  • It is usually possible to alter the airflow into the hood
  • Some types may have outlet valves, which must be in a good condition
  • These respirators may be worn continuously for more than 1 hour
  • Fan-powered hoods, helmets and visors are OK for medium work rate (work involving sustained hand and arm movements)
  • They are also suitable for a high work rate (heavy manual work requiring a lot of exertion and energy)


  • Ensure you have the right filter(s) for the substance - particle or gas or vapour, or the required combination
  • Always fit identical filters to all filter holders (up to three per respirator)
  • Change used filters at the manufacturer's recommended frequency
  • Select the right size hood for each wearer
  • Ensure that wearers check the RPE fits correctly every time, as recommended by the manufacturer
  • Fit restraining facilities as recommended
  • Ensure that the respirator has a flow indicator
  • Always recharge or change the battery after the recommended period of use (e.g. four hours, or at the end of the day)


  • Use in oxygen-deficient atmospheres - e.g. confined spaces
  • Use filters other than those recommended by the manufacturer
  • Store in dirty areas between uses
  • Damage or deform the hood, helmet or visor when putting it away
  • Get dirt inside the hood, helmet or visor, or use solvents to clean the hood, helmet or visor, straps or filters
  • Use a damaged respirator - hood, helmet, visor, filters, straps, valves or hose
  • Use AX filters with hoods, helmets or visors
  • Make DIY modifications to the RPE