NRT Domain 1: General (7.7%) - Complete Study Guide 2026
The RESNET National Rater Test (NRT) is a 55-question, two-hour online multiple-choice exam that sits at the center of the HERS Rater certification...
NRT Domain Deep Dives
Domain Deep Dives for the RESNET National Rater Test (NRT) exam - 7 in-depth guides to help you prepare with confidence. Browse all study resources or jump straight into a guide below.
NRT Domain 2: Health and Safety (10.0%) - Complete Study Guide 2026
Domain 2 of the RESNET National Rater Test covers the health and safety obligations a HERS Rater carries into every home they evaluate.
NRT Domain 3: Building Science Topics (9.7%) - Complete Study Guide 2026
The RESNET National Rater Test (NRT) is a 55-question, multiple-choice exam administered online through RESNET-accredited Rater Training Providers.
NRT Domain 4: Insulation (9.7%) - Complete Study Guide 2026
Domain 4: Insulation is one of five domains sharing the 9.7% weight band on the RESNET National Rater Test, sitting alongside NRT Domain 3: Building...
NRT Domain 5: Heating and Cooling Systems (9.7%) - Complete Study Guide 2026
Heating and cooling systems sit at the mechanical heart of residential energy performance.
NRT Domain 6: Domestic Water Heating Systems (7.7%) - Complete Study Guide 2026
Domestic Water Heating Systems is Domain 6 of the RESNET National Rater Test, carrying a 7.7% weight.
NRT Domain 7: Appliances and Lighting (7.0%) - Complete Study Guide 2026
Domain 7: Appliances and Lighting is the smallest single domain on the RESNET National Rater Test, weighted at exactly 7.0% of the exam content.
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