Course Content
Using the Halo Disinfection System
This section covers the safety measures required when using the HaloFogger. It includes understanding the OSHA H2O2 levels for safe reentry after fogging, the correct use of a respirator, and the necessary personal protective equipment (PPE) for filling the device with disinfectant.
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HaloFogger Training Course
About Lesson

Lesson 3: Operating the HaloFogger for Room Fogging

The HaloFogger is a device that produces a dry mist of hydrogen peroxide to disinfect rooms and surfaces. It has four main components on its faceplate:

  • The high-precision nozzle, which emits the mist in a controlled and uniform manner.
  • The timer, which allows the user to set the fogging duration according to the room size and disinfectant concentration.
  • The start button, which initiates and stops the fogging process.
  • The disinfectant fluid level indicator, which shows the amount of fluid remaining in the device.

Some models of the HaloFogger, such as the EXT and the FLX, have an extension hose that can be attached to the device for more flexibility and reach. Rather than a single nozzle, the FLX and EXT have two nozzles (one for air and one for the HaloMist chemistry) and the hose has corresponding symbols that match with these nozzles. The hose needs to be primed with a priming bottle before use. The hose also has a green cap that should be used to plug it when moving the device. In these models, the nozzle is positioned separately from the device, but it still requires a clear misting path of at least six feet.

Before using the HaloFogger, it is essential to follow the safety and room preparation guidelines that are explained in the previous lessons. These include:

  • Locating the eyewash station and the SDS (Safety Data Sheet) for hydrogen peroxide.
  • Having a person who is respirator fit tested on site.
  • Measuring the room dimensions to calculate the fogging time.
  • Sealing windows and doors, covering vents, unplugging electronics, and evacuating all people and animals from the room.
  • Positioning the HaloFogger or the nozzle one foot away from the wall in a corner, pointing towards the center of the room.

Next, position the HaloFogger one foot away from the wall in a corner, pointing the nozzle towards the center of the room. Ensure an unobstructed misting path of at least six feet during the entire treatment.

If using a HaloPortal, which is a wall-mounted system that connects to multiple HaloFoggers, the user does not need to position the nozzle, but simply plug into the portal. However, the area in front of the portal must be clear for six feet to ensure proper misting.

Once you’re ready to fog, follow these steps:

  1. Plug in the HaloFogger to a power outlet.
  2. Double check the room size and determine the fogging time based on the timetable on the back of the unit.
  3. Check the fluid level and make sure there is enough HaloMist for the fogging time.
  4. Prepare strips of tape and a “Do Not Enter” sign for the door.
  5. Press and hold the start button for two seconds to initiate the fogging process. The indicator light will flash red, indicating a 30-second countdown before the mist is dispensed. Leave the room before the light turns solid red.
  6. When the light turns solid red, the HaloFogger will begin dispensing a dry-fog of HaloMist disinfectant.
  7. Seal the door with tape and post the sign to prevent anyone from entering the room while the mist is active.

Note: The fogging time can be stopped by pressing the start button twice or unplugging the device.

Wait until the HaloMist concentration in the room reaches 1 ppm or lower before reentering.

This may take several hours or overnight, depending on the room size and ventilation. Alternatively, if you must enter before the dwell time is finished, wear a respirator to protect yourself from inhaling the mist. Refer to the safety lesson for more information on respirators.

This is how to operate the HaloFogger for room fogging. After completing this course, you will be able to use the HaloFogger safely and effectively. For more educational resources on biosafety and facility hygiene, visit the Biosafety University from Quip Labs.