Short answers to common questions about HERS ratings, Mass Save, and how your information is handled.
The Home Energy Rating System (HERS) Index is a standardized score for a home's energy performance. Lower is better. New construction in Massachusetts often needs a HERS rating for code compliance or for Mass Save program incentives.
Use the evaluator on the home page. It asks a few project questions and tells you whether a rating is required, recommended, or unlikely to apply.
Typically a pre-drywall inspection, a blower-door test, duct testing where applicable, and a final inspection. Schedules vary by project type.
Mass Save offers incentives for new construction and major renovations that meet specific performance targets. The path depends on project type, system choices, and the rating result. The evaluator gives a starting answer; the call confirms it.
Based in Westborough, MA. Projects across Massachusetts. Response within one business day.
Yes — independent HERS rater listed on the Mass Save approved rater listing. Not a builder, not a contractor.
Effective Date: 4.29.2026
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