Why is My Zero Energy Home Not a Zero Carbon Home?

ANSI/ASHRAE/IES Standard 90.2-2018, Energy-Efficient Design of Low-Rise Residential Buildings, recently adopted requirements to limit operational carbon emissions in homes and multifamily dwelling units. Through reliance on RESNET/ICC 301-2022, Standard 90.2-2018 standard has established a consequential carbon accounting methodology that supports life-cycle analysis of operational CO₂e emissions, encouraging residential decarbonization.