SPR and RED Sustainability Consultants worked developed early drafts of the Technical Note and Assessor Handbooks for the in-home version of NatHERS. This project enabled the early development of two key support tools for the in-home version of NatHERS (now known as AccuRate Enterprise) – the Technical Note and the Assessor Handbook. RED Sustainability Consultants are building designers and energy assessors with wide expertise in using all NatHERS tools. SPR contributed our deep knowledge of energy efficiency program design and consultation processes to the project. A later commission from the NatHERS team built on this early work to prepare close-to-final drafts for government decision-making processes.