AC Tonnage Calculator — Sizing Guide

A ton of refrigeration (TR) measures cooling power. 1 Ton of capacity can remove 12,000 BTUs of heat per hour. Room sizes between 100-150 sq ft typically need 1.5 Tons of AC capacity.

A typical 1.5 Ton 3-Star inverter AC draws about 1.0 to 1.2 kW per hour during active cooling. Over an 8-hour period, it consumes roughly 6 to 8 units (kWh) of electricity, depending on the temperature setting and ambient outdoor heat.

Yes. A 5-Star inverter AC is roughly 15-20% more energy-efficient than a 3-Star AC, saving about 150-200 units annually. For a standard tariff of Rs. 8.00/unit, this translates to savings of Rs. 1,200 to Rs. 1,600 per year, offsetting the price premium in 2 to 3 years.

Set your AC to 24°C or 25°C. According to the Bureau of Energy Efficiency (BEE), every degree increase in the AC temperature setting saves approximately 6% of electricity. Setting your AC to 24°C instead of 18°C can reduce your AC's power consumption by up to 36%.

AC tonnage measures cooling capacity (1 Ton = 12,000 BTU/hr). Standard sizing rules: up to 100 sq ft requires a 1.0 Ton AC, 100–150 sq ft requires a 1.5 Ton AC, and rooms larger than 150 sq ft need a 2.0 Ton AC to cool effectively.

Indian Seasonal Energy Efficiency Ratio (ISEER) measures the ratio of heat removed to the energy consumed over a typical year. A higher ISEER rating means higher efficiency. Currently, 5-Star ACs require an ISEER of 5.0 or above, while 3-Star ACs require 3.8 to 4.9.

Yes. Sleep mode automatically increases the set temperature by 1°C per hour for the first two hours (up to 2°C). This aligns with the natural drop in body temperature and ambient night temperatures, saving up to 10-15% of night power consumption.