What is UV-C Dosage?

Every restoration and cleaning job comes with its own distinct complexities that influence how a project is approached. For odor removal and disinfection jobs, factors such as the type of structure layout, source of the odor, and project timeline all impact what type of device should be utilized and how it should be applied. When it comes to using UV-C for disinfection and odor removal, it is essential to understand what UV-C dosage is and how to apply the correct dose for a successful project outcome. 

What is UV-C Dosage

UV-C light falls between the range of 100-280 nm on the ultraviolet spectrum. UV-C inactivates microorganisms by destroying the DNA and RNA of the organism, rendering it unable to reproduce or carry out necessary cellular functions.

However, understanding the factors affecting UV-C dosage is crucial to effectively using UV-C, as an improper dose can affect the efficacy of the device. The correct term for UV-C dosage, or strength, is fluence. Fluence is the amount of UV irradiation produced by a UV-C device and is expressed as mJ/cm². Fluence can be measured, and the International Ultraviolet Association (IUVA) collects and makes available years of data and underlying scientific publications for known fluences required to inactivate specific pathogens.

Coverage Area Recommendations

Calculating fluence can be complicated and requires the use of special equipment. For this reason, we provide our clients with coverage area recommendations based on the data gathered from the extensive testing done by the IUVA. Following the coverage area recommendations and the operating manual helps ensure projects receive the necessary exposure to remove odors effectively. 

Factors Influencing UV-C Dosage

The necessary UV-C dose can be impacted by several factors. One of the most important components to remember is that if air cannot get to an object, neither can the oxidants from a UV-C device. Additionally, adding some type of air movement and creating a vortex when possible is recommended to disperse the UV-C oxidants further.

Consider these factors when using a UV-C device on a cleaning or restoration job to ensure you achieve the correct dosage:

1. Layout of structure: It is much easier to disperse the oxidants in an open space. For structures with multiple doors and hallways, consider using air movers to disperse the oxidants to the other room.
2. Multiple floors: Projects with multiple floors may require additional machines or air movers.
3. Ceiling heights: The Airbotx coverage guidelines are based on ceilings that are a minimum of 9 feet. However, shorter or significantly higher ceilings may change the necessary amount of UV-C devices or air movers.
4. Stronger or lighter odors: Lighter odors will typically need less exposure time as long as the source is removed. Potent odors may indicate a more pervasive problem that needs exposure time longer than the standard recommended time. 
5. Source removal: The source of the odor (mold, standing water, etc.) should be removed before turning off the UV-C device.
6. Time available: Most projects will typically take 3-5 days to complete.

Final Thoughts

When properly employed, UV-C devices such as Airbotx are powerful disinfection tools that can help improve the indoor air quality of a job. We are committed to ensuring that our clients have the tools necessary for successful projects. If you have any questions about what UV-C dosage is right for your restoration or cleaning job, contact our team at support@airbotx.com or (317) 981-1811.