10 Best Ozone Purifiers 2025 in the United States

The Honeywell AllergenPlus HEPA Air Purifier (HPA104) is designed for medium-sized rooms around 155 square feet, making it a good choice if you want to improve indoor air quality by removing allergens like pollen, pet dander, and smoke. It uses a HEPA filter, which is excellent at capturing tiny particles—up to 99.97% of them. The purifier offers four cleaning levels, allowing you to adjust airflow and filtration intensity to your preference. It operates quietly at about 35 decibels, roughly the sound level of a soft whisper, so it won’t disturb daily activities or sleep. The unit also earned the ENERGY STAR label, meaning it runs efficiently without driving up your electricity bill.

This purifier does not produce ozone, so it may not address concerns where ozone output is specifically desired for air treatment. It also lacks advanced timer or smart control options, relying on simple button controls. Safety-wise, HEPA filters are safe and widely recommended; however, if you were looking for ozone-based purification, this model wouldn't meet that need.

The device is compact and easy to use without assembly, backed by a 5-year warranty. If your goal is to reduce airborne allergens and smoke in moderate-sized rooms with quiet, effective filtration, this Honeywell purifier fits well but is not suitable for ozone purification purposes.

This ozone generator delivers a powerful ozone output of 45,000 mg/h, making it suitable for treating medium to large spaces up to about 2,500 square feet. It is designed for both home and commercial use, effectively targeting odors from smoke, pets, cooking, and more. The unit includes a simple timer knob that lets you set it and leave it running safely in unoccupied rooms, with an additional 'hold' function for continuous ozone release. It is built with a long-lasting ozone plate and a lifespan of up to 35,000 hours, requiring minimal maintenance aside from fuse replacement.

This device produces strong, pungent ozone gas, which requires empty rooms without people, pets, or plants during use. After treatment, thorough ventilation of at least one hour is necessary to clear the ozone safely. The safety precautions are clear but may limit use around households with frequent occupancy or sensitive individuals. Additionally, it is not available for sale in certain regions like California due to regulatory restrictions.

This ozone generator fits users who need a high-capacity solution for stubborn odors in unoccupied spaces such as basements, cars, kitchens, or small commercial settings. For those seeking quiet operation, filter options, or safe continuous use with people around, other air purifiers might be more suitable. If strong, fast odor removal is required and safety steps can be followed, this product offers robust performance and durability.

The Honeywell InSight Series HEPA Air Purifier is designed for extra-large rooms, making it suitable for areas up to 500 sq. ft. It circulates air effectively, providing almost five air changes per hour. This ensures thorough coverage and efficient purification. The combination of a HEPA filter and a carbon pre-filter works well to reduce allergens, smoke, dust, pollen, pet dander, and odors. This makes it a good option for households with pets, smokers, or allergy sufferers.

An automatic cleaning feature that monitors air quality and adjusts the settings ensures consistent air purification without constant manual adjustments, adding to its convenience. The purifier is AHAM Verified and Energy Star Certified, confirming its reliable performance and energy efficiency. The noise level is 55 dB, which is moderate and may be noticeable in quieter environments but not overly disruptive in most homes.

On the downside, it lacks ozone output, which is a key spec for an ozone purifier. It also does not have advanced control settings beyond basic button controls. The purifier uses genuine Honeywell filters, ensuring dependable performance, but this means recurring costs for filter replacements. At 20.5 pounds, it's relatively heavy but doesn't require assembly. In summary, the Honeywell InSight Series is a robust air purifier suitable for large spaces and those needing strong allergen and odor control, although it does not fulfill the ozone output requirement for an ozone purifier.