[Mr Dvae]

Hi guys
got a few rooms to clean in a house, damp walls now drying out but mould is growing in corners and on furniture,.
Has anyone got any advice as to use of a fogger or possibly an ozone machine for killing off the mold thru the whole room, just a little worried as to using ozone having read about it but the machine sounds a good idea.
which would you go for and why?

[The Great One]

Hi

depends on what's in the rooms, foggers can sometimes damage materials, rubber etc.

Wet fogging has a higher micron size and deploys a wet mist whereas a thermal fogger gives out a dry mist and hangs in the air longer, it will penetrate the surface, you have to use a particular chemical to suit the fogger (i.e. millkill for mould)

An Ozone machine will clean odours from the air by separating the oxygen molecules to O3 and then reconverting them to O2 and effectively scrubbing the air to 0.3 microns.

Wet foggers range from $150-£360 +VAT where a thermal fogger can go up to £2000 +VAT + chemicals.

Regards

Martin

[Mr Dvae]

thanks martin


regards

Dave

[fenman]

I have been told that ozone machines should not be used straight away after any cleaning as they will add 02 to h20 making it h202 which is hydrogen peroxide and will bleach things.
I do not know if this is true.

[The Great One]

Hi

Ozone has been extensively used for water purification, but ozone chemistry in water is not the same as ozone chemistry in air. High concentrations of ozone in air, when people are not present, are sometimes used to help decontaminate an unoccupied space from certain chemical or biological contaminants or odors (e.g., fire restoration). However, little is known about the chemical by-products left behind by these processes (Dunston and Spivak, 1997). While high concentrations of ozone in air may sometimes be appropriate in these circumstances, conditions should be sufficiently controlled to insure that no person or pet becomes exposed. Ozone can adversely affect indoor plants, and damage materials such as rubber, electrical wire coatings, and fabrics and art work containing susceptible dyes and pigments (U.S. EPA, 1996a).

Maybe use a HEPA filter to extract particles from the area, open windows, use an ionizer.

Once the source contamination has been treated, there really should not be a need for an ozone machine. Depends on the extent of the contamination.

Regards

Martin

[BDCS]

I used to work in a soft drinks factory with a spring water line. The ozone generator is a sufficient danger that the area is monitered and if the concentrations in the general body of air get high an alarm sounded and the hall evacuated. Ozone was added to the wash water in the rinser to kill the bugs but not in the product