The e-wire™ common-wire adapter enhances energy efficiency and installation convenience for smart thermostats. With savings of 0.5 to 2 watts, or approximately 4 to 17 kWh annually, e-wire™ outperforms other adapters as the most energy-efficient option available. Designed and manufactured in the USA, e-wire™ boasts a lifespan ten times longer than standard adapters, with a durability that matches or exceeds the life of the HVAC system itself. The adapter includes a 5-year warranty, providing reliable, long-term power for smart thermostats in homes lacking a dedicated common wire—an estimated 60 million U.S. households, as reported by the U.S. Energy Information Administration.