HERS Index, Home Energy Rating Index, RESNET, Residential Energy Service Network, IECC, thermal envelope, duct system, mechanical ventilation, air sealing, building codes, energy codes,

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A more efficient energy future starts with action today. Your gift supports real change: lower energy bills, cleaner air, local jobs, and healthier communities. Every dollar helps NEEP advance smarter energy solutions across the Northeast and Mid-Atlantic.

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