# Energy Efficiency — Demand-Side Management

**URL:** https://thecodex.expert/energy/efficiency/
**Session:** 21 | **Date:** 2026-05-03

## Summary

Energy efficiency reduces energy needed to deliver a given service. IEA's 'first fuel' — 40% of NZE 2050 clean energy progress must come from efficiency. Buildings (~40% global energy): LED 80% less than incandescent, heat pumps 300% efficiency, ECBC India. Industry (~37%): motor efficiency, PAT scheme India (13 sectors, 478 plants). Transport: EVs 85-90% vs ICE 25-30%. India T&D losses: ~18% (vs 5-6% Europe), RDSS scheme targets 12% by 2025. BEE star ratings for ACs, refrigerators. Rebound effect (Jevons Paradox): 10-30% direct rebound. Sources: IEA Energy Efficiency 2024, BEE India Annual Report 2023, CEA India.