AC Tonnage and Electricity
Consumption — Complete Reference

The 1 ton AC is ideal for rooms up to 120 sq. ft — standard Indian bedrooms, study rooms, and small offices. At 3-star fixed speed, it consumes 1.10 units/hour, adding 264 units/month at 8h/day. Upgrading to a 5-star inverter model reduces this to 0.80–0.88 units/hour, saving ₹422–₹576/month. The 1 ton category is the safest choice for keeping your household within the 101–300 unit slab in most Indian states.

The 1.5 ton AC is India's most popular size — covering 150–180 sq. ft rooms, which matches the standard Indian master bedroom and living room. At 3-star fixed speed, it consumes 1.65 units/hour. A 5-star inverter model reduces this to 1.20–1.32 units/hour, saving ₹634/month. The 1.5 ton category is the sweet spot between cooling capacity and electricity cost for most Indian households.

The 2 ton AC is designed for rooms of 180–240 sq. ft — large living rooms, halls, and open-plan spaces. In a correctly sized room, it's efficient. In a smaller room (under 150 sq. ft), it short-cycles: cools too fast, shuts off, restarts at full power — wasting 20–30% more electricity and providing poor humidity control. A 2 ton 3-star fixed AC adds 528 units/month, which in most Indian states pushes households into the highest electricity slab.