Air disinfection tool
This calculation tool for Air disinfection is based on a theoretical calculation. Once lamps are designed in equipment of any kind, the UVC efficiency should be measured as the equipment design will have an effect on the UVC intensity profile in the irradiated space and consequently on the UVC dose.
In the calculation following is taken into account:
- System preferably on 24h, 7 days a week. Cycling (for instance in office buildings) is possible but should be taken into account when designing the application.
- Reduction rate selection is based on design of application: High -> optimized design with reflection, optimized air flow etc.. Low -> minimal design without reflection, optimized air flow etc.
- As air speed in HVAC systems is typically very high (1 to 3 m/sec) a log 1 reduction can only be reached with optimized systems, placed in the best way in the system or in the room. Total solution needs to be optimized.
- This tool has been designed to provide indicative calculations for air disinfection of moving air.
- Calculations are based on Keitz formula for UV-C irradiance*. Dose is calculated: Irradiance*exposure time.
- In design-in phase reflection, optical design, switches, temperature, humidity should be taken into account**
- This calculation and outcome are to be used to get a first estimate of the number of lamps needed. The final number should be based on measurements in the final equipment. It is the final equipment manufacturer or installers’ responsibility to release a well performing product to the market.
- For design-in support, please go through ** documents below.
Air disinfection calculator
Philips UV-C lamp systems are a safe, reliable and proven choice for use in ventilation air ducts, air disinfection units and stand-alone air purifiers. This calculator provides a rough indication of how many UV lamps you need in your in-duct air disinfection system. Detailed information about air disinfection is available here ›
This tool gives you a rough indication of how many UV lamps you need in your in-duct air disinfection system:
Detailed information about lamps are available in our e-catalogue ›
Air flow
The calculation is based on 70% reduction of micro-organisms taking various parameters into account, such as the effect of air moving in an open space, speed of air and cycles in a room.**
Required reduction rate of organisms
Please select the reduction rate you want to reach, which in most cases will be the combination of lamp selection and application design.
High can only be reached with a good design, reflector and correct amount of lamps. Therefore this should only be selected when installing the lamps in such a design.
Your Result
UV output from the selected lamp: UVC 100h
Depreciation: % (at useful lifetime)
Number of lamps required to obtain effective dose: lamps
This is an indication only. Actual reduction rates will depend on equipment design. Please contact us for further information.