What’s the lowdown on dry fogging?

Need to sanitise a whole room or workspace? We’ve designed The EcoChemist DA2 Dry Fogger and The EcoChemist Surface & Air Spray to work in tandem, creating a non-hazardous, effective fog that doesn’t wet surfaces or damage belongings.

How does it work?

The EcoChemist’s dry fog has very small particles, between 5 - 10 microns. Human hair has an average 75 microns, so you can imagine how tiny that is!

Their miniscule size means The Ecochemist dry fog particles stay suspended in the air without settling on hard surfaces, keeping them safe and dry throughout the entire fogging process.

An ultrasonic wave at 33-40 kHz atomises the particles, making them a uniform size and dispersing them into the air.

How does this compare to current practice?

Most commercially available foggers are what we’d describe as ‘wet’ – meaning their particles are so large that, rather than staying in the air, they fall and land on surfaces or objects. 

Currently, many hospitals and healthcare practices use ‘wet’ fogging to sterilise their workspaces, which requires rooms to be cleared and vacated before they’re fogged due to their harsh chemicals and residual moisture.

The EcoChemist’s dry-fogging system solves both of these potential issues by disseminating lightweight particles that remain airborne, and by using a spray formula that’s 100% hydrogen peroxide, ozone, hazardous-disinfectant, and chlorine dioxide-free.

School Classroom Testing

Not only does The EcoChemist’s non-hazardous formula and dry fogging process protect surfaces and electrical equipment – it’s proven to be safer for people too. Tests were carried out using Anocide-S™³ (the active ingredient in The EcoChemist Surface & Air Range) dispensed at a rate of 50 ml/m3 in the form of a dry fog and here’s what they found:


Sample air quality at the end of a normal school day. Fog the classroom using 50 ml per m3, and then resample the air. Classroom size was 8 x 7 x 3 metres for a volume of 112 m3. Room was well ventilated during the period.

 The Process

  • Air samples of 2000 - 5000 litres of air taken immediately after the students left.
  • Room was then fogged using The DA2 fogging machine and The EcoChemist Surface & Air Sanitiser.
  • Machine set up in the middle of the room and 50ml per m3 for a total of 5500ml. This was achieved in 55 minutes.
  • At all times the surfaces stayed dry.
  • Air samples were then incubated for 24-48 hrs.
School classroom testing results

The Results

Before fogging 334 CFU / m3

After Fogging 4 CFU / m3 (Sampled after 100 minutes)

Best clean room standard (FDA guideline 209E): Class 100  < 3 CFU/m3


¹ As defined by European Chemical Agency, June 2020, (ECHA/BPC/250/2020)
² Dry fog consists of particles < 10 microns that remain suspended in the air and do not wet the surfaces
³ Trademark of AWS Group for Active Chlorine generated from sodium chloride by electrolysis plus proprietary additives.

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