In September 2025, Evan Kobres extended Home Assistant’s core repository by implementing support for the inH₂O (water column) pressure unit. He enhanced the backend by updating constants and conversion logic in Python, ensuring accurate handling of water-column pressure measurements throughout the platform. This work required careful data conversion and comprehensive unit testing to guarantee consistent readings in dashboards and automations. By aligning the pressure unit framework for future extensibility, Evan reduced the integration effort for additional units. The depth of his contribution lies in both the technical precision and the groundwork laid for ongoing improvements in Home Assistant’s pressure measurement capabilities.