<h1>SF6-free technology adoption reduces greenhouse-gas emissions and supports sustainable, cost-efficient power distribution infrastructure.</h1> Deployment of SF6-free RM AirSeT medium-voltage ring main units replaces SF6 insulation with pressurised air, offering substantial greenhouse-gas reduction and lifecycle cost savings. The equipment is presented as durable and functionally equivalent to conventional SF6 RMUs, with initial deployment in Tata Power's Mumbai and Delhi networks and planned extension to Odisha utilities. Adoption is framed as aligning distribution infrastructure procurement with national decarbonisation objectives and mitigating risks associated with high global warming potential insulating gases.