Research has found that ozone generators were not effective at stopping mold or bacteria growth in a standard hospital room, and would require unsafe levels of ozone to do the job at all (Dyas, Boughton, & Das, 1983). For mold growth, public health departments do not recommend using ozone generators for clean-up, saying that ozone even at high levels cannot control mold.
MY COMMENT: Unsafe levels are used in ozone shock treatments, 6 to 15 times more ozone than what is considered safe to breath. That's why it's called a "shock" treatment. Also, you can't control mold with ozone or any air cleaner! The only way to "control" mold is to find the water leak (or source of moisture) and cut it off, or to use dehumidifiers to lower the humidity levels so that mold can't grow. What ozone can do to mold however is kill the airborne spores so that they don't make you sick. Air purifiers are worthless on mold because as you're walking around you're constantly kicking up dust and mold spores (if they are present) You need ozone gas to kill the airborne mold. Why you hate'n on ozone so much, brah?
Performance against VOCs
You may be asking yourself, if ozone gas is effective at anything, it should work on other gaseous pollutants (specifically volatile organic compounds, or VOCs) right? Well, it might not, unless you wait for thousands of years in some cases. A research study (Boeniger, 1995) analyzed how long it would take to remove 14 of the most common organic compounds found in the air. It was found that at ozone concentrations of 100 ppb, it would take 880+ years for six of these pollutants to be broken down into half of their initial concentrations (half-lives). In fact, it would take more than 4,400 years for formaldehyde! Only one pollutant, styrene, was found to have a half-life of about 4 hours.
MY COMMENT: 100 ppb? How disingenuous and misleading. Stating that the amount of ozone in mountain air (70-100 ppb) isn't effective at getting rid of VOC's and trying to tie that to suggest an ozone shock treatment can't reduce VOC's? A video exist on YouTube that show how ineffective the $800 Molekule machine failing at reducing VOC's in a tiny 10 by 10 foot room, let alone an entire house. Ozone shock treatments is how furniture manufacturers lower VOC off-gassing from furniture before when the government contract mandates certain VOC off-gassing levels. They throw the furniture in an empty semi truck trailer, they pump in ozone on and off for a week straight (airing it out along the way) and then a week later, VIOLA, hardly any off-gassing. Since VOC's are a gas, the only way to force them to come out is to use a gas (ozone) to go in and break those chemicals down. that's just a fact of science. Once airborne, it's easy to flush those harmful tiny particles out of the house or structure or furniture. The point is that ozone helps break down VOC's at very HIGH concentrations, not 100 ppb. We recommend 20 to 30 grams of ozone per 1000 square feet, on and off for one week, air being flushed out several times a day when trying to deal with a "sick home" structure. The use of carbon filters is also recommended. I strongly object to the sale or use of table top air purifiers to try and deal with mold, VOC, or third hand smoke issues! That should be illegal - false advertising - stealing from an ignorant public. Instead, the government seems to aide and abet those sellers and poo-poo ozone which is the solution. Why? Who knows. Maybe because the incorrect use of an ozone air purifier can cause harm so they decided to throw the baby out with the bathwater?
Performance against particulates
You must remember that ozone generators do not remove particulate matter like dust or pollen (which are often allergens) from the air.
MY COMMENT: No, you must remember I've been blogging about the best way to clean indoor air for over 8 years now. In a nutshell, the best way to remove airborne particulate is by changing your MERV 11 furnace filter ever 3 weeks and running the fan in the "ON" position 24/7. Why? Your HVAC system filters all of the air in your home, by design, 2 times per hour. That 3000 CFM air moving capability is what it takes to remove airborne dust. Table top air purifiers like the Molekule have been proven to be a waste of money because they don't move enough air. Some larger air purifiers like Airpura can move a lot of air as proven by their CADR ratings. Interestingly, Molekule refuses to have their air purifier tested for CADR. Why? It doesn't move enough air purify anything more than a small bathroom I guess. (being generous, was going to say broom closet.)
The EPA’s conclusion about effectiveness
The EPA concludes from a review of scientific research that at concentrations that meet public health standards, ozone is not very effective at removing indoor air contaminants.
MY COMMENT: Scientific research conducted in unoccupied areas with 600 ppb to 15,000 ppb will shows that all viruses, bacteria, molds, fungus, mites, you name it die and VOC's are broken down. It also shows that third hand smoke damage is broken down into tiny particles, removed from surfaces where they can off-gas for 30 years, and after they become airborne, they are unceremoniously shown the door (or window) and ushered out of the house, never to return, never to make people sick again. I even found an old study that found that using ozone shock treatments in public schools (yes, a long time ago before they black listed ozone) found that test scores increased and they had fewer absent days when they got rid of the toxic mold that was making the kids sick by using ozone at night. It's called sanitation. Ozone also makes musty places smell nice and fresh again. It's called odor remediation with a high concentration ozone shock treatment. It's not called using ambient air levels of ozone to clean the air.
Can ozone generators remove odors?
The million dollar question for you might be whether ozone generators can remove odors from the air. That at least is what manufacturers claim to be the most common use for ozone generators in homes.
However, the evidence is mixed as to whether ozone generators can remove most odors from the air. As mentioned above, ozone generators may not work efficiently at all for gases, namely volatile organic compounds (VOCs), as it could take hundreds of years for this process. (at 100 ppb Einstein, sheesh. What about 10,000 ppb,. huh?)
Yet, some research reviewed by Britigan, Alshawa, and Nizkorodov (2006) has shown that ozone may be effective for certain types of VOCs (namely, those containing unsaturated carbon-carbon bonds). These types of VOCs are found in cooking oils, air fresheners, cleaning agents, etc. However, there is a big downside: other dangerous byproducts like formaldehyde can be released into the air when ozone reacts with these substances.
COMMENT: Ozone also breaks down formaldehyde. I know this because air fresheners off-gas formaldehyde and some people are very sensitive to those toxic Febreze type cleaners and they need to use an ozone shock treatment to remove those toxins from the air. A professional ozone shock treatment using the protocol we suggest uses a break down process, on for 30 minutes, off for 1 hour, to break chemicals down. At the end of the process, negative pressure is used to draw in 100% fresh air and to force out all of the air that was ozonated. This is especially important when the ozone shock treatment was conducted to get rid of third hand smoke damage or VOC's from "Sick Home Syndrome" ….new home construction glues, etc. The idea is to break down the toxins that off-gas from surfaces, get them airborne, then show them the door. It takes a gas to defeat a gas. An air purifier won't do the job, like I often say, they just suck and blow your money. By the way, if you ever rent a home to an Indian family and find that the entire house smells like curry after they move out, don't go buy a Molekule to fix the problem. Oh no. That would be like throwing $800 in the shredder! You can however completely get rid of the curry odor with several ozone shock treatments! VIOLA! Curry gone. How can that be if ozone doesn't work? Can it be that ozone shock treatments do work at getting rid of odors and the anti-ozone crowd is just trying to sucker you into spending $800 on something that doesn't work?
Here is another important point: What you might perceive as odor removal may just be façade. Odors in a room could be masked by the smell of ozone being released into the air. Many people who use ozone generators like the smell that is produced, describing it as a “clean sheet smell” or the smell of clothes fresh from the dryer (EPA, 1995).
COMMENT: After you draw fresh air in after an ozone shock treatment, the air will still smell nice and fresh, but the air will actually be mostly fresh air you brought in from outside while flushing the house of the post-ozonated air. What you accomplished was killing mites, neutralizing dust mite feces, breaking down off-gassing VOC's and third hand smoke damage, killing any airborne or surface molds, bacteria, viruses, that's all.
If you perform a simple 30 minute ozone shock treatment the way I've done for years you don't have to flush the air out right away, especially if all you're really doing is killing the airborne and surface "bad guys" (bacteria, molds, viruses, fungus, mites, parasites) as well as kill any flies, moths or mesquites that might get trapped inside when the god particle gas known as ozone comes a calling! You need enough ozone to do the entire home at one time and utilize an always on HVAC fan to distribute the ozone everywhere, including the AC coils to keep them bacteria and mold free. How much ozone do you need? If your home is 2000 sq ft you need 20,000 mg/h and a high powered 3000 CFM fan to get the job done. Our air 2000 sq ft air purification solution only cost $169 and get this, doesn't require any expensive replacement filters! I know. I know. Selling that isn't going to make anyone wealthy. The money is made in $799 machines with expensive replacement filters don't you know! Oh yeah, with a PhD founder! They're especially good at helping a stupid and ignorant public on the best way to purify indoor air and remove odors and VOC's. Yeah, that's the ticket!
Yes, "advertising can be powerful." There's a sucker born every second as the saying goes. But do you know what is more powerful? THE TRUTH!!! It can set you free. Free of wasting your money. $799 to be exact, lol. ;-)