What media filters Ozone

Jyetman · 05/30/2019, 01:53 PM

I have a sharper image ionic air filter. They went out of business because they lied about the products. If they produce high amounts of ozone why can't I affix sheets of carbon media to the air-out vents? Will this reduce the high amounts of ozone being produced? Will it become safe to use the filter?

mcgyvr · 05/30/2019, 02:01 PM

Just press the off button or unplug it

bertoni · 05/30/2019, 08:42 PM

Carbon media might help, at least for a while. Most activated carbon filters are good for a few hours in air, but the ozone might be reactive enough to make it worthwhile. If there's an ozone risk, though, I'd just replace the filter. If you want to do some experiments, you'd need an ozone sensor to do much.

Jyetman · 05/30/2019, 09:00 PM

Quote:

Originally Posted by bertoni

Carbon media might help, at least for a while. Most activated carbon filters are good for a few hours in air, but the ozone might be reactive enough to make it worthwhile. If there's an ozone risk, though, I'd just replace the filter. If you want to do some experiments, you'd need an ozone sensor to do much.

Are there any decent ozone sensors available under $50 like on amazon?

bertoni · 05/30/2019, 09:56 PM

I don't know of any, but I haven't had a need for one. Some quick searching found only higher-priced units.

smatter · 06/13/2019, 02:20 PM

Can you smell O3?

Jyetman · 06/19/2019, 08:00 PM

Quote:

Originally Posted by smatter

Can you smell O3?

not after i put the carbon sheets on it.

bertoni · 06/19/2019, 10:51 PM

So I'd guess that the ozone is reactive enough to keep the activated carbon working. That's useful to know. I hope the residual ozone level is low.

lrhorer · 08/19/2019, 04:24 AM

If you cannot smell the effluvia right at the exhaust vent, then the levels of Ozone are loo low to be a health hazard to you. Keep your small pets out of the room for extra safety, and make sure the room is reasonably well vented. Also keep any plants in the room at least 3 or 4 meter away. Ozone is rather unstable, and does not last terribly long. At room temperature, it has a half-life of roughly 1 day. Ozone levels considerably below that considered dangerous to humans (~0.1ppm) will, however, cause many hydrocarbons - particularly rubber and some plastics - to degrade far faster than would otherwise be the case.

Ozone is damaging to mucous membranes and respiratory tissues. Any individual with asthma, COPD, or other respiratory issues should definitely avoid exposure. Graphite - usually in the form of activated charcoal - is very effective at removing Ozone from the air. It is a cery pungent and acrid gas, so detecting fairly small concentrations of it is usually very easy.

lrhorer · 08/19/2019, 04:30 AM

To clarify, if you cannot smell Ozone right at the exhaust vent, then you should be OK. Even a hint of Ozone is too high a concentration to which to be continuously exposed. Many people are unable to smell Ozone even at marginally hazardous levels.

Jyetman · 08/26/2019, 08:34 PM

Quote:

Originally Posted by lrhorer

To clarify, if you cannot smell Ozone right at the exhaust vent, then you should be OK. Even a hint of Ozone is too high a concentration to which to be continuously exposed. Many people are unable to smell Ozone even at marginally hazardous levels.

With the thick carbon sheets covering the entire vent I cannot smell anything. With carbon sheets off there's a strong ozone smell so will be changing carbon sheets every several months.

lrhorer · 08/27/2019, 06:43 PM

Quote:

Originally Posted by Jyetman

With the thick carbon sheets covering the entire vent I cannot smell anything. With carbon sheets off there's a strong ozone smell so will be changing carbon sheets every several months.

Actually, I am not so sure that is necessary. Eventually, of course, the carbon will need to be changed. However, unlike organic matter, the Ozone should not clog the pores of the Carbon filter media. The Ozone reacts with the Carbon to produce Oxygen and CO2, buth of which should float away. Over time, the media will become eroded, but I expect this will take quite a long time. I would guess replacing the media every couple of years will likely suffice.

Jyetman · 08/31/2019, 12:54 PM

Quote:

Originally Posted by lrhorer

Actually, I am not so sure that is necessary. Eventually, of course, the carbon will need to be changed. However, unlike organic matter, the Ozone should not clog the pores of the Carbon filter media. The Ozone reacts with the Carbon to produce Oxygen and CO2, buth of which should float away. Over time, the media will become eroded, but I expect this will take quite a long time. I would guess replacing the media every couple of years will likely suffice.

Thank You

05/30/2019, 01:53 PM	#1
Jyetman Registered Member Join Date: Nov 2012 Location: Phoenix, AZ Posts: 1,712	What media filters Ozone I have a sharper image ionic air filter. They went out of business because they lied about the products. If they produce high amounts of ozone why can't I affix sheets of carbon media to the air-out vents? Will this reduce the high amounts of ozone being produced? Will it become safe to use the filter?

05/30/2019, 02:01 PM	#2
mcgyvr Registered Member Join Date: Sep 2003 Location: North Carolina Posts: 20,050	Just press the off button or unplug it __________________ Who me?

05/30/2019, 08:42 PM	#3
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	Carbon media might help, at least for a while. Most activated carbon filters are good for a few hours in air, but the ozone might be reactive enough to make it worthwhile. If there's an ozone risk, though, I'd just replace the filter. If you want to do some experiments, you'd need an ozone sensor to do much. __________________ Jonathan Bertoni

05/30/2019, 09:56 PM	#5
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	I don't know of any, but I haven't had a need for one. Some quick searching found only higher-priced units. __________________ Jonathan Bertoni

06/19/2019, 10:51 PM	#8
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	So I'd guess that the ozone is reactive enough to keep the activated carbon working. That's useful to know. I hope the residual ozone level is low. __________________ Jonathan Bertoni

06/13/2019, 02:20 PM	#6
smatter Registered Member Join Date: Dec 2002 Location: Madison, WI Posts: 2,055	Can you smell O3?

08/19/2019, 04:24 AM	#9
lrhorer Registered Member Join Date: Jul 2017 Posts: 42	If you cannot smell the effluvia right at the exhaust vent, then the levels of Ozone are loo low to be a health hazard to you. Keep your small pets out of the room for extra safety, and make sure the room is reasonably well vented. Also keep any plants in the room at least 3 or 4 meter away. Ozone is rather unstable, and does not last terribly long. At room temperature, it has a half-life of roughly 1 day. Ozone levels considerably below that considered dangerous to humans (~0.1ppm) will, however, cause many hydrocarbons - particularly rubber and some plastics - to degrade far faster than would otherwise be the case. Ozone is damaging to mucous membranes and respiratory tissues. Any individual with asthma, COPD, or other respiratory issues should definitely avoid exposure. Graphite - usually in the form of activated charcoal - is very effective at removing Ozone from the air. It is a cery pungent and acrid gas, so detecting fairly small concentrations of it is usually very easy.

08/19/2019, 04:30 AM	#10
lrhorer Registered Member Join Date: Jul 2017 Posts: 42	To clarify, if you cannot smell Ozone right at the exhaust vent, then you should be OK. Even a hint of Ozone is too high a concentration to which to be continuously exposed. Many people are unable to smell Ozone even at marginally hazardous levels.