Physics 01
How Many Units Does a 1.5 Ton AC Use per Hour?
A 1.5 ton 5 star inverter AC uses about 0.86 units an hour at 35 °C outside and 24 °C inside. Worked examples for star ratings, thermostat and tariffs.
energy saving
Physics 02
How Much Does an LED Bulb Save in a Year?
A 9 W LED gives the light of a 60 W bulb and saves about 93 units, ₹652 a year at 5 hours a day. CFLs, tube lights, slab tariffs and payback, worked.
Physics 03
How Much Electricity Does a Geyser Use? Units and Cost
A 25 litre geyser heating four 20 litre baths a day uses about 86 units a month, ₹604 at ₹7. Heating time, standing loss, instant, heat pump and solar.