Ozone Generator Shock Treatment and Sizing Guide

Nov. 04, 2024

Ozone Generator Shock Treatment and Sizing Guide

Factors to Help Determine Ozone Generator Size:

You will get efficient and thoughtful service from Quanju.

The recommendations we give are conservative and designed for professionals in the mold redemption, fire & flood restoration, and odor removal businesses. When charging for a service in these professions, companies cannot afford to have to come back and retreat, or re-initiate the application. This is the reason for our conservative recommendations. Before choosing an ozone generator, it is important to understand ozone generator ratings and industry differences outlined in the following two paragraphs.

It is fairly common for some companies to advertise and recommend the size or output of an ozone generator with only square footage ratings for general air purification results in mind, rather than actual output levels needed for germ killing with Shock treatments. There is some confusion of output ratings (usually square footage ratings) or how much ozone will be needed for a particular application. Some of these sizing recommendations can be misleading. (note that ppm, or "Parts Per Million" is not an ozone output measurement and should never be used to compare ozone generator outputs, only go by the Milligrams per Hour; "mghr"). Since sizing an ozone generator is dependant on several factors, we try to avoid giving unqualified square footage and ppm ratings. Square footage ratings must also disclose whether they are for air purification, or for Shock treatments, as the mghr output recommendations will be vastly different.

One of the biggest competitive issues when purchasing an ozone generator is the ozone output rating in Milligrams Per Hour (mghr or mg/hr). The most important thing to understand is that while mghr is the only fair way to compare the output of an ozone generator, the rating of 1 mghr of ozone output with one company does not always equal the 1 mghr rating with another company. In fact, we often see discrepancies that are over-rated by a large margin; sometimes several hundred percent.
The International Ozone Association (IOA) has an interest in this issue and expects to push ozone generator manufacturers to get a NIST (National Institute of Science and Technology) government accepted standard for mghr ratings. The NIST standard was expected to be in place by now, but as the IOA is a Non-Profit organization, it has been difficult to get the required time allocated from appropriate directors to put towards this issue.
Allergy Purifiers LLC (o3ozone & www.o3ozone.com ) offers very conservative ratings designed for the professional fire, flood, MOLD, ODOR, and crime scene / death scene protein decomposition clean up industries.

Note that 0.2% of ozone is a significant level; this is why ozone concentration is measured in Parts Per Million (PPM). It only takes 3-4 PPM to kill off all germs, including MOLD, Bacteria, and Viruses.

For Recommendations on just air purification, see "How To Purify Air" After reviewing the information on this page to find the basic variables that affect your application, you are welcome to us your application information / variables for recommended output of an ozone generator at .

There are a couple questions and a few variables to consider when choosing an ozone generator.

The intended use should be determined. The basic choice is:

1) Air Purification

2) Shock Treating along with air purification.

We highly suggest including Shock Treatment use. Shock treatment use is when ozone in put into a room at high levels, usually for a few hours, to even a few days, to kill germs, mold, smoke or any odor. Shock treatment use requires significantly more ozone than air purification, but is the best way to get maximum effectiveness of an ozone generator.

6 variables to consider to determine the appropriate size ozone generator:

Contact us to discuss your requirements of commercial ozone generator. Our experienced sales team can help you identify the options that best suit your needs.

(1) Type of contamination:

Odors only in the air, such as smoke, indoor air pollution, chemical fumes, exhaust, and other emissions can be eliminated with ozone usually in short time with mild shock treatments. However, Mold, organic or protein decomposition, skunk, smoke damage from a building fire, heavy cigarette or cigar smoke build-up from tenants or heavy smokers, and other extreme odors require longer treatment times, and, or a higher concentration of ozone for several hours, to several days of treatment time.

(2) Level of contamination:

If the contamination is severe, more time, and or more ozone will be needed for the treatment. In the case of HEAVY MOLD, HEAVY FIRE DAMAGE (SMOKE), or Crime Scene Clean-UP (decomposed protein), an expert construction company or specialist familiar with proper clean-up / remediation procedures should be consulted. You can get an idea of what will be necessary for complete remediation of these heavy contaminant issue types by viewing our MOLD page. Similar procedures will be followed for Fire / Smoke, and crime scene clean-up and other decomposed protein treatments.

(3) Size of treatment area:

The size of the treatment area is extremely important in choosing the right size ozone generator.

(4) Temperature:

Ozone is depleted much more rapidly in high temperatures, than in low temperatures. At COLD temperatures, such as freezing, ozone may not be depleted for over 30 Days. It is important to use ozone in temperatures above 60 degrees Fahrenheit. See understanding ozone depletion.

(5) Humidity:

(6) Desired treatment time:

more ozone will be required for shorter treatment times, less for longer treatment times.

Recommended equipment:

For commercial mold or decontamination shock treatments .5-2 g/hr ozone should be used for every 100 sq/ft, depending on how fast the job needs to be done and how bad the problem is. With .5 g/hr / 100 sq/ft treatment should last for 1-2 days +, with 2 g/hr / 100 sq/ft it should only take about 6-12 hours. NOTE that for UV ozone generators, only half the rated ozone above is usually necessary as these formulas consider only corona discharge ozone generators used in average humidity (which greatly reduces output of a corona discharge ozone generator). UV ozone generators ozone output is not reduced by humidity.