[grey_whiskers]

I've had them for years. You can tell within 24 hours of installing them, how much difference they make to clean the air.

The UV light directly attacks the genetic material of the microbes. See if you can get the TiO₂ sleeves, which work with the UV to split up water into various things..(e.g. oxygen and hydroxide) which attack organic materials as well.

[thinden]

The UV light directly attacks the genetic material of the microbes. See if you can get the TiO2 sleeves, which work with the UV to split up water into various things..(e.g. oxygen and hydroxide) which attack organic materials as well.

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yes I could tell a difference in 24 hours. HVAC installer said it could take 48 hours.

thanx for direction on TiO2 sleeve. adding on to do list for tomorrow.