How Do You Calculate Ozone Generator? How Big Ozone Generator Needed?

Choosing the right size ozone generator for your home, office, pool, or commercial area is as important as choosing the right brand. If you’re in the market for a new ozone generator, you’re probably wondering how to size the unit and which one is best for your room.

The first thing to consider is what you need the unit for and how much ozone you’ll require in that space. There are certain parameters to help with that, including the nominal ozone efficiency which is represented by mg/h.

What Size Ozone Generator Do I Need?

It depends on what you need the ozone generator for. If it’s for a small room or space, like a car, small RV, or other small spaces, you’ll need about 5,000 mg/h or 15 g/h. For a large room, a 15,000 mg/h or 15 g/h capacity unit will do just fine.

This has to do with ozone efficiency and tells us just how much ozone a unit produces per hour. Many units actually come with a gp/h rating, which means “grams per hour”. There is also the factor of the ppm (parts rating which must also be considered.

Beyond the efficiency, another factor to consider is the area to be covered and the size of the unit, including its fan strength and capacity and circulation capacity. It is important to note that an ozone generator meant for a small room will not do so well in industrial settings.

Beyond the output, the flow rate is another important factor, because it can determine performance. If you have two units of ozone-producing 15 g/h each, but with different air flow rates, you’re likely to get different results.

To calculate the flow rate for an ozone generator needed for a pool, you need to do the following;

Volume/720 minutes (for 12-hour turnover) = full flow gpm

For instance: 10,000/720 minutes = 13.9 gpm (grams per minute)

After getting the grams per day rating, the next point is to check the dosage rates, which often range from 0.1 to 0.5 ppm. If we’re using the 0.5 ppm rating, along with the standard multiplier rate of 0.228  we can go on with the calculation as outlined below;

0.5 ppm x 13.9 g/h x 0.228 = 1.58 g/h

The below tables offer some rules for applying ozone generators, based on power and sizing requirements as highlighted below;

Source: Ozone-Generators.EU

Source: Chemtronics

There are other uses of ozone generators that will require different measurement parameters. You’ll need to also check the cum/h rating of the unit. It’s important to look at ozone generators for different situations so that we can better understand how to size them.

Ozone Generators for Cleaning Firms

If you run a cleaning company, it’s important you get ozone generators for different size areas and applications.

For instance, you may need to get ozone generators with output between 15 to 20 g/h for very large rooms and spaces. This should be able to cover areas between 10,000 and 15,000 cubic feet.

Ozone Generators for Homes & Workshops

Sizing ozone generators for your home or workshop can be done using three different parameters; humidity, temperature, and purpose. The point is, the percentage of humidity in your home will also cause a reduction of ozone by the same percentage.

If you have 60% indoor humidity, you’ll lose about 60% of the ozone released in your home. This is why you should get about 3-4 times more in a highly humid environment.

Also, a rule of thumb to follow is to use 1,000 mg/h of ozone for every 100 sq ft of space in order to attain effective levels of ozone. The EPA recommends 1 ppm of ozone, but you’ll need as much as 5 ppm to kill germs and insects. Just know that this can affect your lungs, so you’ll need to leave the space for at least an hour as you apply this.

Ozone Generators for Cars

A typical car is between 80 to 120 Square feet. In fact, most of them are sized around 97.6 sq ft. Hence, you should look out for units that come in those sizes.

Beyond that, the dimension of the unit is also important, so that you won’t have a problem locating it in your car. Try to keep the dimensions under ‎7.5 x 3 x 2.8 inches.

Thankfully, many ozone generators come with specific information for sizing, detailing what area they are suitable for.  For instance, the OdorStop Professional Grade unit has a coverage capacity of 2,500 sq ft.

Ozone Generator	Area (Size)	Best Used for
OdorStop Professional Grade Ozone Generator	2,500 sq ft	Best for medium to large rooms, including offices, hotel rooms, and basements
Enerzen Ozone Generator 11,000mg Industrial Unit	2,000 sq ft	Also suitable for medium to large spaces, including basements, bars and restaurants, and hotel rooms.
AIRTHEREAL 5,000 mg/h Ozone Generator	1,000 sq ft	Perfect for small spaces, like a kitchen, bathroom, bedroom, or small living room.
Mammoth 5000 mg/h Ozone Generator	1,000 sq ft	Great for cars, RVs, small rooms, and home offices.
LKT Car Ozone Generator	Less than 200 sq ft	Perfect for cars and very small rooms

Final Thoughts:

Knowing the size of the ozone generator you need is the first step towards ensuring your unit performs as required. Beyond the brand popularity and trust, reviews, features, and tested durability, the size can also determine whether you’ll enjoy the benefits of pollution removal or not.

With this guide, you should be able to determine what unit you need based on several factors like size, coverage, dosage, and airflow where necessary.