Several sources of air pollution are present indoor. Some pollutants cause health problems such as sore eyes, burning in the nose and throat, headaches, or fatigue. Further, other pollutants cause or worsen allergies, respiratory illnesses (such as asthma), heart disease, cancer and other serious long-term conditions. Sometimes individual pollutants at high concentrations, such as carbon monoxide create uneasiness.

VOC (Volatile Organic Compounds)
The interior of modern buildings is infested with wide range of Organic and Hydro Carbon gases, which is released from synthetically produced interior furnishings like carpets, curtains, ceiling tiles, paint, fabric protective coatings, and clearing aids, to name few. Occupants contribute VOC are cigarette smoke, body odors, deodorant and food odors. The continuous presence of VOC, even in low concentrations, adversely affects the health of occupants. In addition to this, many indoor VOC should be reduce significantly for safety of occupants.

CO2 (Carbon Dioxide)
The most probable sources of CO2 in indoor space are exhalation by occupants and introduced by outdoor air. CO2 is neither toxic nor harmful, thus it is important to ensure that the concentration of CO2 is not high. Further, at elevated levels CO2 causes reduced concentration, fatigue, loss of productivity and lethargy. Permissible level of CO2 for most application is 1000 PPM by Ashrae and Osha.

CO (Carbon Monoxide)
Carbon monoxide (CO) is a toxic gas; It is colorless, odorless tasteless and non - irritating. Therefore, it is very difficult for people to detect this. Carban monoxide is a product of combustion of organic matter with insufficient oxygen supply. This is often produced in domestic or industrial settings by motor vehicles and other fuel powered tools, heaters , and cooking equipment . It interferes with the delivery of oxygen throughout the human body and causes headaches, dizziness, weakness, nausea, and even death.

Fungi
The conditions prevalent in air handling units and air ducts such as, temperate, humidity, moisture on cooling coils and porous surface of duct lining are congenial for growth and propagation of fungi. Through air vents, they enter indoor space and cause allergies, breathing disorders, irritation and loss of concentration. Fungi provide bio adhesive force to dust and particulate contaminants to adhere duct and AHU sections. Typical discoloration seen around air vents is due to fungi.

Ozone and its Action
The Ozone is tri-atomic Oxygen with weak bonds. It is a powerful oxidizing agent & an unstable gas, which quickly reverts back to diatomic oxygen. The oxidation causes VOC to reduce to molecularly less stable state and further oxidation by ozone. Therefore, in the presence of Ozone, VOC is subjected to continuous oxidation, and thus reduction, and resultants are totally harmless foul odor is a result of VOC. As VOC’s are removed, bad odors are almost completely eliminated resultant is indoor space with a pleasant environment.

Ozone Treatment
Ozone treatment is a proven and a practical solution to purify & de-odorize air in hotels, restaurants, bars, health clubs, offices, guest rooms and other similar places. Unlike air-fresheners or chemicals, “Ozone the nature’s most powerful purifying agent” does not mask the odor, but actually eliminates them through natural oxidation. It has been shown in various tests that alertness and efficiency of an individual increases appreciably in the environment of controlled Ozone.

A very small and safe concentration of Ozone can purify and de-odorize air much better than any other thing. Today Ozone is considered by most to be the best available and advanced technology and a much better alternative than using chemicals.

Ozone and its Action
The Ozone is tri-atomic Oxygen with weak bonds. It is a powerful oxidizing agent & an unstable gas, which quickly reverts back to diatomic oxygen. The oxidation causes VOC to reduce to molecularly less stable state and further oxidation by ozone. Therefore, in the presence of Ozone, VOC is subjected to continuous oxidation, and thus reduction, and resultants are totally harmless foul odor is a result of VOC. As VOC’s are removed, bad odors are almost completely eliminated resultant is indoor space with a pleasant environment.

Ozone Air purification is a continuous and safe process. There are two type of Ozone air purifier presently available, details of which are given below:

Duct mounted Ozone Generators
In this system Ozone modules are mounted inside the air duct in which a little amount of air passes through the Ozone unit. Thus, the oxygen of air gets converted into ozone and the outgoing ozone rich gas is mixed with total air stream and does the purification job. The system controls the output of ozone by feedback from VOC Sensors, Wherein the concentration of ozone is checked and controlled by Ozone sensors automatically.

Ozone Injection into Air Duct
In this system Ozone is produced outside the duct, which is injected into the duct at a suitable location. The generation of ozone, control of concentration and quantity is independent of airflow, air quality and presence of moisture.

• Reduction of VOC and gaseous organic pollutants
• Reduction or near elimination of organic odors
• Reduction or near elimination of smoke due to cooking, smoking or any other source
• Elimination of fungi in indoor spaces, Ventilator coils, ducts and drain pan
• Total elimination of Air borne Bacteria in AC Ducts, Cooling Coils and drain pan
• Residual ozone level in indoor space wee below ASHRAE, OSHA, ACGIH, EPA and WHO specified levels
• Regulation of fresh air damper to maintain CO2 level within standards.
• Saves on capital cost of HVAC systems by reducing the required HVAC plant capacity
• Reduction in operating cost of HVAC system by reducing energy and water requirement
• Fully Automatic System with VOC Monitor, Ozone monitor, CO2 monitor and Controllers
• Provides 4 to 20 mA or 0 to 10 VDC for total integration to computerized Building Management Systems
• Provides output to computer for recording and printing time history records, records of residual VOC, Ozone and CO2

Difference between Competitor’s Plate Type Corona Ozone Generators Versus OZ-AIR’s Tube Type Corona Ozone Generators.

• The parallel plate type systems work on low frequency thus offers high impedance and needs high voltage to operate. This requires a heavy transformer and difficult to handle during maintenance and replacement.
• Higher triggering voltage makes the control curve steeper and difficult to control the ozone generation with respect to incoming control signal.
• Stainless steel grids on both sides of the ceramic plates that are prone to attract dust, especially when ozone generation is very low or switched off in case of low VOC or higher Ozone concentration.
• There is a trend for the entire corona generating system world over for changing from low frequency to high frequency systems.
• This makes the equipment lighter and provides better control.