Beginning on January 1, 2023, the 45L tax credit is based on certification under the EPA ENERGY STAR Residential New Construction program and the DOE Zero Energy Ready Home program. These programs recognize specific organizations to implement a certification system for the program.  As part of the recognition process by EPA and DOE, these certification organizations are approved to use certain software tools for ENERGY STAR or DOE Zero Energy Ready Home certifications.


ZERH certification is implemented through recognized ZERH Certification Organizations, which are required to oversee software approval and QA processes, according to EPA and DOE requirements. Stakeholders can review more information on Certification Organizations for the ENERGY STAR Residential New Construction program and the DOE Zero Energy Ready Home program, including links to currently recognized certification organizations by the EPA and DOE.