Can commercial systems be certified to OG-300?

Yes, OG-300 may be applied to commercial systems, but many of these larger systems are unique and specifically designed for the application. Therefore, it is most commonly specified for residential domestic water heating systems by incentive programs. Many incentive programs require the use of OG-100 certified collectors for commercial systems, and then evaluate the balance of the system by a variety of means. They may also require the use of a heat meter to measure actual system output instead of using the modeled performance to determine incentives.