Why ionization?

2020 was a wake-up call for addressing air quality in our transit fleets. With the presence of road dust, various odors, volatile organic compounds (VOC’s) and microbiological contaminants, maintaining healthy internal air quality (IAQ) has never been more important.


Objectionable odors like body, smoke and cleaning odors impact the transit rider experience.

Air Contaminants

Mold, bacteria, viruses, urine, food, allergens and more often go uncontrolled and can be aerosolized into the occupant space.

Outside air is NOT fresh air

Is it wise to rely on outside air alone for diluting contaminants? The air on our nation’s roadways is generally poor quality with high NOx emissions and dangerous road dust.

Filter Media

HVAC filters in transit bus and rail applications are among the weakest filters used in public spaces.
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“The most adaptable air cleaning options on the market”
“Transit vehicles offer one of the best applications for this technology”

The air we breathe is anything but clean.

It is filled with everything from pollen, dust and dander particles, to odors from body odor, halitosis, urine, flatulence, exhaust and smoke, not to mention pathogens like mold, bacteria, and viruses.

There are several technologies available for improving air quality. CCT’s air cleaning suite of products offers adaptability, reliability and minimal maintenance with a package uniquely designed to handle the nuances which differentiate transit vehicles from commercial building applications.

International Pathogen Testing.

• Positive and Negative Ions are able to inhibit bacterial and fungal/mold growth.

• Higher concentrations of ions increase efficacy on various pathogens including viruses.

• Positive and Negative Ion generation is more effective than unipolar.

How Ionization Works​

Cleaner air before you can say Ionization Integration

Transit vehicles are limited to using low-efficiency media filtration, as compact HVAC systems have system design restrictions. Climate Comfort Technologies (CCT) systems integrate ionization with transit HVAC design to maximize the ion distribution throughout the air handling system and the occupied space, while maximizing media filtration effectiveness.

Agglomeration: The bigger they are, the easier they fall.

Ions attach to micro-particles in the air causing them to be attracted to one another. Once together, the much larger groups of particles harmlessly fall to the ground where they can be swept or vacuumed out. The groups of particles that stay airborne can more easily be filtered from the air, improving filter capture rates.

Your nose will know

Ions in the air reduce odors like volatile organic compounds, body odor, fuel and smoke, into more tolerable forms, like water vapor, through gas disassociation.

Mechanism for Addressing Micro-Biological Particles

Ionization also interrupts the reproductive abilities of pathogens, like bacteria, mold, and viruses, by removing hydrogen from the protein membrane. This process is capable of inactivating pathogens in aerosol form.

CCT ionization technology is the most cost effective air purification available for public transit.

CCT air cleaners are designed with components that require the least amount of labor or replacement parts. Compared to other technologies, this is a valuable savings and benefit for transit operators.