Energy Model
A computer simulation of a building that predicts energy consumption based on climate data, insulation levels, HVAC equipment, occupancy patterns, and appliance usage. Tools like EnergyPlus and BEopt are used by auditors.
Why It Matters
An energy model identifies which upgrades deliver the most savings before you spend money, reducing the risk of costly improvements that underperform.
Related Tools
Related Terms
Energy Audit
A professional assessment of a home's energy performance, including blower door testing, thermal imaging, duct leakage testing, insulation evaluation, and appliance efficiency review.
HERS Index (Home Energy Rating System)
A scoring system from 0-150+ that rates a home's energy efficiency. A HERS Index of 100 equals the reference home; lower scores are more efficient. A net-zero home scores 0.
Manual J Load Calculation
The industry-standard method (ACCA Manual J) for calculating a home's heating and cooling loads based on climate, insulation, windows, orientation, occupancy, and other factors.