Startups like Parity are optimizing HVAC systems in large buildings to reduce energy use and shift demand during peak times. By automating energy adjustments, Parity helps buildings cut energy consumption by up to 30% and reduces grid strain during heatwaves, benefiting utilities and building owners alike. This technology was tested in New York, doubling power savings without impacting occupant comfort. Such innovations support the transition to grid-interactive, energy-efficient buildings, crucial for reducing emissions and managing peak electricity demand.