Addendum 50 HERS® Modeler The RESNET Board of Directors established a policy that all personnel developing HERS® ratings must be trained and certified in the use of the Accredited Software Tool(s) they use. The Standards Development Committee 200 developed Addendum 50; HERS® Modeler, to implement the policy. Addendum 50 requires: RESNET to develop of core curriculum for the Accredited Software Tools and a HERS® Modeler Practical Evaluation; Training Providers to develop courses, and; Rating Quality Assurance Providers to certify HERS® Modelers. The Mandatory Compliance Date (MCD) has been set as January 1, 2022 to provide adequate time for HERS® Modelers to be trained and certified. The target for when programs will be in place to begin certifications is July 1, 2021. To view the complete requirements for Certified HERS® Modeler in Addendum 50 visit: Addendum 50 – HERS® Modeler
