05/09/2025
The Cooling Technology Institute is proud to provide an update on the progress of a Sound Certification Program. The new Sound Certification program will be conducted per CTI Standard 204, which the CTI Board of Directors approved in April 2025. In conjunction with Sound Certification, the Sound Measurement Test Code, CTI ATC 128, has been updated with a release in February 2025, whose section 8 for small towers will provide measurement methodology for this program.
To be eligible for Sound Certification, the equipment must be Thermal Performance Certified based on CTI Standard 201. By purchasing a CTI Sound Certified model, an owner/operator has assurance the heat rejection device will perform thermally as specified as well as comply with the manufacturer's published sound pressure ratings.
Currently, there are 108 manufacturers along with 30 private brand affiliates participating in the Thermal Certification Program from all regions of the globe with 292 certified open- and closed-circuit cooling tower product lines available to the market, comprising a total of over 85,000 individual models. All manufacturers who are interested in certifying the sound of their heat rejection equipment product lines are invited to do so by filling out the certification inquiry form, indicating your interest in Sound Certification. The form can be found at https://www.cti.org/certification-inquiry.
The Sound Certification Administrator requests applications for the initial round of sound certification for specific product lines be submitted by July 31, 2025, to ensure the applicant has time for product line review and testing to have their sound certification posted on January 1, 2026. The CTI also encourages those manufacturers with thermally uncertified lines to apply for thermal certification under the CTI STD 201 program by contacting the Thermal Certification Administrator.
About Cooling Technology Institute
The Cooling Technology Institute is an international non-profit organization committed to advancing the technology, design and performance standards of cooling towers and related systems. CTI provides a platform for industry leaders to collaborate on research, education and the development of best practices. For more information, visit https://www.cti.org.
