MAISY RECS Hourly Loads & Emissions Databases

Question 12. How do MAISY RECS Hourly Loads Differ from Engineering-based Loads Provided by DOE/NREL?

Short Answer: MAISY RECS whole building and end-use hourly kW loads include actual household end-use loads while DOE/NREL published loads include average or curated loads that ignore kW random load variations that are important in analysis and planning scenarios.

Longer Answer: MAISY RECs whole building and end-use hourly kW loads are based on a nearest neighbor machine-learning process that matches RECS household characteristics with household characteristics in the MAISY End-Use Hourly Loads Database consisting of more than 230,000 actual end-use daily hourly loads. DOE/NREL hourly loads typically reflect average or engineering-based loads that ignore the random nature of end-use loads in actual households. Random variations in actual loads in MAISY RECS Databases can reflect more than twice the hourly kW demand and demand variation significantly changing daily load profile characteristics.

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