Solar Thermal Collectors

The ICC-SRCC OG-100 Solar Thermal Collector Certification Program for solar thermal collectors assesses compliance with the ICC 901/SRCC 100 standard. Published by ICC and ICC-SRCC, the standard sets minimum safety, durability and performance requirements for many types of solar thermal collectors used for fluids like water, glycol and air. Compliance with ICC 901/SRCC 100 is required in most building codes in use throughout North America such as the IBC, IRC, IMC and IPC model codes and the California Energy Code (Title 24, Part 6).

OG-100 certification also requires testing to measure the performance of solar collectors and references the internationally accepted test methods like the ISO 9806 and ISO 9459 standards. By using these internationally recognized test methods, manufacturers can minimize the need to retest to gain certification in different global markets. And many OG-100 certification holders are eligible to obtain the SOLERGY eco-label - without retesting.

OG-100 certification reports display the measured performance using standardized ratings that make it easy to compare collectors on an equal basis. Click here to learn more about OG-100 certificates. So designers and consumers can make educated choices. And SRCC provides all current OG-100 certificates in our publicly available, searchable online directory.

Incentive programs, building codes and regulations throughout North America recognize OG-100 certifications and performance ratings. OG-100 certification can be used to meet the requirements of many Federal, state, local, and utility and programs that provide rebates and incentives for solar water and air heating products in both the U.S. and Canada.

Are you a manufacturer of solar thermal collectors and ready to apply for certification? Click here to access our portal and apply online.


ICC-SRCC OG-100 is the most widely recognized certification program for solar thermal collectors in North America, ensuring that certified products can be sold, incentivized and installed virtually anywhere in the region. Check the DSIRE website for listings of solar water and pool heating programs that reference ICC-SRCC's OG-100 certification.
OG-100 certifications are based on the same performance tests used by other global certifications programs like Solar Keymark and SHAMCI. This reduces the need to retest and makes most OG-100 certification holders eligible to get the SOLERGY label.
OG-100 addresses nearly all solar collector types, including glazed, unglazed, flat plate, evacuated tube, ICS, building-integrated, concentrating, transpired, & PVT.
SRCC has been offering solar thermal certifications for over 3 decades. We know your products and we know Standard 100 - because we wrote it.
Code officials, consumers, designers and architects rely on the information in OG-100 certificates, available publicly on the ICC-SRCC website. Check it out on our online listing directory.

To learn more about having your solar thermal collector certified under the OG-100 certification program, click on any of the links provided, or  contact us.