Exhaust air and ventilation


The Wood´s Airmaster ozone generators with ozone tube technology are used for treating air and reducing grease in flat pipework and ventilation ducts and systems. The ozone breaks down edible fats and impurities, preventing odour problems and grease accumulation in flat pipework and ventilation ducts.

Wood´s Airmaster ozone generators are used for treating exhaust air from cooker hoods, ventilation ducts and flat pipework. The ozone generators with a hose connection can be connected to the exhaust air duct, in order to eliminate odours and grease. This can minimise problems with neighbours who are disturbed by kitchen smells. After the ozone has broken down the grease, the exhaust air tubes are cleaner, need less maintenance and the air supply remains constant.

How to use the Wood´s Airmaster ozone generators with an exhaust air connection to the cooker hood

  • The ozone unit is mounted to the wall by means of a so-called “keyhole solution”.
  • The hose fitting is connected to the ozone generators outlet.
  • An (ozone-resistant) silicon hose connects the ozone unit to the exhaust air pipe. The hose is connected above the cooker hood.

In order to ensure straightforward operation of the unit, the Airmaster BLC ozone unit is fitted with digital controls. An ozone monitor (ozone controller) or/and a pressure gauge, can be connected for even more control and safety.

2-4 mg ozone per m3/hour, depending on the system.
Under normal circumstances 2 mg are sufficient.

Air supply 1000 m3/hour 2 mg ozone = 2000 mg/hour
(We recommend Airmaster BLC 2000-D)

Duct length:
The ozone requires ca. 2-3 seconds of contact time to be able to oxidise (break down) the various impurities and odour substances. We recommend a contact time of 3 seconds to ensure an effective treatment with ozone.

The contact time and required duct length can be calculated on the bases of the air supply and duct measurements.

Duct length in metres =
Air speed (m/s) x contact time in seconds (s)

m/s = (m3/hour / 3600) / (Diameter2 x π (3.14) / 4)

Air supply 1000 m3/hour, duct diameter 0.5 m
1.4 ≈ (1000 / 3600) / (0.52 x 3.14 / 4)

This results in an air speed of 1.4 m/s.

1.4 m/s x 3 s contact time = 4.2 metres duct length

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