About BuildingEnergy

How We Get Results

BuildingEnergy estimates residential end-use loads with a hybrid engine: annual consumption defaults from EIA RECS 2020, hourly shapes calibrated to NREL ResStock end-use load profiles, and engineering performance curves for heat pumps and heat-pump water heaters. Bill calibration and (on Pro) real utility tariffs from OpenEI keep time-of-use and complex rate analysis precise.

This approach runs entirely in the application—no always-on ML inference servers—while preserving site-specific overrides and upgrade scenario physics.

The system integrates:

  • RECS-based annual end-use estimates by climate, home type, size, and vintage
  • ResStock-calibrated hourly shapes for heating, cooling, water heating, cooking, and other loads
  • Temperature-dependent ASHP / HPWH performance curves with backup resistance
  • Optional bill calibration and Pro-tier OpenEI tariff application
  • Location-specific climate (HDD/CDD) and building characteristics from address lookup

About the Developer

This site was developed by a real person from Maine with extensive experience in building performance and energy analytics. Our mission is to deliver accurate, data-driven insights to help homeowners, builders, and policymakers make informed decisions about energy efficiency improvements and renewable energy adoption.