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| Links | Links |
| ABSA - The Association of Building Sustainability Assessors Here you can check that my registration is current (#60617), or find other assessors You may also confirm the authenticity of your energy rating certificate NatHERS - The Nationwide Energy Rating Scheme NatHERS is the governing body in the assessment of energy efficiency | Your Home - Technical Manual This government initiative has a wealth of information regarding residential design principles and information sheets of various sustainable technologies WERS - The Window Energy Rating Scheme Here you can find information about the performance of your windows, or find windows which match specific SHGC and U-Values |