Best AC 2025: Complete Tonnage Calculator + Energy Savings Guide (₹15k/Year)
1 ton AC for 120 sq ft, 1.5 ton for 150 sq ft rooms. 5-star inverter AC saves ₹15,000/year vs 3-star. Expert guide: split vs window, copper coil benefits, ISEER ratings, top brands (Daikin, LG, Voltas). Budget breakdown (₹25k-₹55k+).