CounterAct calculator

Christie CounterAct Product

CounterAct calculator

It's easy! Input a few standard measurements about your space and how you'll use it into the Christie® CounterAct calculator, and it displays the information you need for your indoor spaces: from the recommended number of CounterAct fixtures and their suggested configuration to duty cycle details and Care222® lamp lifetime.

Need to configure another room? Just click Reset and you're ready to enter new information.

Want more information? Contact a Christie sales rep.

Configure CounterAct for your space

Christie CounterAct Product
Enter your room dimensions
Values must be between 1 and 100
* Mandatory field
Advanced variables
i Working distance above floor is where you are most interested in having a uniform layer of pathogen-inactivation. For example, a tabletop is typically 1m / 3ft.
i How many hours per day will most people spend in this space? If staff will spend the most time in the space, enter that number.
i How many hours per day is this space in use, from open to close?
i How many days per year is this space in use? If 5 days/week, enter 260. If every day, enter 365.
Christie CounterAct
This space requires 18 CounterAct fixtures
Your indoor space – dimensions and use
Room length:
Room width:
Room height:
Working distance above floor:
i Working distance above floor is where you are most interested in having a uniform layer of pathogen-inactivation. For example, a tabletop is typically 1m / 3ft.
Daily exposure time:
Operational hours/day:
Operational days/years:
Fixtures required:
Fixtures per row:
Fixtures per column:
Row spacing between fixtures:
Column spacing between fixtures:
Power @ working distance:
Unit duty cycle:
i Duty cycle is the optimal % of time Care222 lamps need to run based on the dimensions and use of your space for optimal pathogen-reduction while aligning with ACGIH guidelines.
Care222 lamp lifetime (yrs):
The high ceilings in the room require multiple fixtures to be installed at each fixture position in order to achieve the target UV power.

We created this Christie CounterAct Calculator solely for the convenience of interested persons to generate a rough assessment of the number of fixtures that may be required in a given space in accordance with current Threshold Limit Values (TLVs) for far-UVC 222nm light as established by American Conference of Governmental Industrial Hygienists (ACGIH) and International Electrotechnical Commission (IEC) standard IEC 62471 Ed. 1.0 b:2006 – Photobiological Safety Of Lamps And Lamp Systems. It is fully the installer and/or end-customer's responsibility to calculate and verify the performance of these fixtures operating as a complete system once installed to ensure proper installation and operational specifications.

Christie strongly recommends that CounterAct devices be installed by professionals properly trained to work with UVC fixtures.

Christie CounterAct products with patented Care222 technology are not for use as or for medical devices or for therapeutic use on humans or animals or to disinfect medical devices.

This product is not intended to diagnose, treat, cure, or prevent any disease. The pathogen-reducing efficacy of Christie CounterAct products with patented Care222 technology and their use in occupied spaces is dependent on proper installation and operational specifications, in accordance with ACGIH guidelines.

Any references to "disinfection" and "disinfecting" are referring generally to the reduction of pathogenic bioburden and are not intended to refer to any specific definition of the term as may be used for other purposes by the U.S. Food and Drug Administration or the U.S. Environmental Protection Agency.

The Care222® standard character mark and stylized logo mark are registered trademarks of Ushio America, Inc.'s patented technology, in the United States, European Union, and United Kingdom.

Product images as shown are for illustration purposes only. Actual product may vary due to product enhancement.

©2021 Christie Digital Systems USA, Inc. All rights reserved.