GT 3000 Review

We like that this model is a very efficient unit and environmentally friendly as well. We don't like that it doesn't have a very good warranty.

GT 3000 Ratings

DESIGN - 94%



We like that this model is a very efficient unit and environmentally friendly as well. We don't like that it doesn't have a very good warranty.

User Rating: 3.68 ( 8 votes)

Some spaces require more TLC than others, especially when it comes to odor and germ reduction. This is the principal reason why ozone-generating air purifiers like the GreenTech GT3000 exist. Ozone generators are the gold standard when it comes to deodorizing spaces and they’re great at disinfecting the air, but ozone faces a lot of controversies in terms of safety. If you’re curious about how you can possibly benefit from the GreenTech GT3000, read our review below.


  • Recommended for use in areas of up to 3000 square feet
  • Effectively kills germs, viruses, and bacteria
  • Affordable price
  • Remote control offers a convenient operation
  • Energy efficient operation
  • Low-cost maintenance work


  • Warranty is only 1 year long
  • Unappealing design
  • Produces ozone

Technical Specifications

This air purifier generates ions to a concentration of 1 million/cm³, while its ozone output is up to 360 mg/hr on Away Mode and 25-300 mg/hr on High Mode. According to GreenTech, using the device according to the instructions stated on the owner’s manual will ensure that the “safe threshold” of ozone density (0.05 ppm) will not be exceeded unless you use the Away mode. The coverage area for this device is 250 sq. ft. minimum while the maximum is 3,000 sq. ft. The minimum area is actually relevant as far as this air purifier is concerned because users are not supposed to run it inside a smaller room to avoid ending up with an ozone concentration that is unsafe. Aside from ozone generation and ionization, the GT3000 also offers photocatalytic oxidation and electrostatic filtration to sanitize the air and rid it of particle pollutants and odors.

Specifications Sheet

Specs 3000
Dimensions 12” x 12” x 9”
Weight 10.2 lbs.
Area Coverage 3000 sq. ft.
Noise Level Low
Power 22-45W, 100-240V, 50/60Hz, 2.5A
Ozone Output 25 – 300 mg/hr
Ion Generation 1 million/cm³
Fan Speeds Adjustable
Filter Type Photocatalytic Oxidation, Scalable Ozone Generation, Pulse Ionization, Electrostatic Filtration, Needlepoint Ionization
Odor Reducing Tech Photocatalytic Oxidation, Scalable Ozone Generation
Control Panel LCD display and electronic buttons
Timer Function Yes (on Away mode)
Warranty 1 Year


The GT3000 can get the job done in indoor spaces up to 3,000 square feet, so it can definitely act as a whole-house air purifier if your home doesn’t exceed the specified area. Thanks to the various technologies used by this model, it’s able to neutralize mold, mildew, and bacteria like e. coli, listeria, staph, salmonella, candida, giardia, legionella, and cryptosporidium even when they’re embedded in carpets, furniture, walls, ceilings, floors, clothing, closets, beds, and other places that are not exposed to normal air flow.


The GT3000 comes with a convenient remote control and an easy-to-use control panel. Operation is also quite easy-the only things you actually need to do are to plug it in, turn it on, set the square footage, and then turn the fan to the desired speed. Aside from having an adjustable fan speed, you can pick from three modes-Normal, High, and Away-to customize the ozone output of the machine. The Away Mode specifically has a programmable auto-shutoff timer that you can use to buy yourself enough time to let the room’s ozone levels normalize before you return. Lastly, the fact that it’s a whisper-quiet air purifier is beneficial as well.


This air purifier is 9 inches wide, 12 inches high, and 12 inches deep. It weighs 12.1 lbs and is available in black. According to GreenTech, its side panels are specially designed to replicate high-tech carbon fiber, a material that is being used in aerospace and sporting equipment. It has that distinctive, compact look that’s common to ozone generating air purifiers, and its aesthetics give off an industrial vibe that might not sit well with modern interiors.


This air purifier comes with a 1-year warranty. For further information, you may contact GreenTech’s Customer Service department, which is accessible via email and phone call.

Final Thoughts

The advanced technologies that go into the manufacturing of the GT 3000 air purifier make it one of the most reliable models on the market in terms of odor and germ reduction, and it should also be able to do a good job at reducing particle pollutants due to its ionizer and electrostatic filter. Of course, there’s the issue of ozone safety, so you have to make sure that you’re using your device properly. But if you don’t mind resorting to such a heavy-duty option for the sake of having an effective air cleaning device for large spaces, then the GT3000 is certainly worth considering.

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