The NatHERS Assessor Handbook has been developed by the NatHERS Administrator in conjunction with industry experts.
It is designed to help assessors navigate the NatHERS assessment process, by describing how assessments are to be conducted, including the mandatory and recommended steps of the process.
The handbook provides additional guidance to support the NatHERS Technical Note. It presents information that can assist assessors, regardless of which NatHERS accredited software tool is used. For guidance on undertaking activities in a specific software assessment tool, assessors should contact their software tool provider or consult their relevant software tool manual.
The Whole of Home Guidance Note and Thermal Bridging Guidance Note have been incorporated into the current version of the NatHERS Assessor Handbook. Use the current version to comply to NCC 2022 requirements.
- View the current NatHERS Assessor Handbook - PDF (published 16 April 2024)
- View the current NatHERS Assessor Handbook - Word DOCX (published 16 April 2024)
Previous version:
Use the June 2019 version to comply with NCC 2019 requirements.
- NatHERS Assessor Handbook June 2019 PDF Superseded
- NatHERS Assessor Handbook June 2019 Doc Superseded