What does it cost to run?

Central air conditioner The biggest single line on most summer power bills.

~3,500 W · 8h/day →

Window air conditioner Cheap to buy; the running cost depends on runtime.

~900 W · 8h/day →

Portable air conditioner Convenient, but the least efficient way to cool a room.

~1,100 W · 8h/day →

Refrigerator Runs 24/7, but the compressor only works part-time.

~150 W · 8h/day →

Garage refrigerator Usually an old unit in a hot space — a double penalty.

~200 W · 10h/day →

Upright freezer Frost-free convenience costs extra energy.

~120 W · 8h/day →

Electric water heater Second-largest electricity user in most all-electric homes.

~4,500 W · 3h/day →

Heat pump water heater Same hot water for about a third of the electricity.

~550 W · 4h/day →

Electric tankless water heater Enormous draw, but only while hot water is flowing.

~18,000 W · 1h/day →

Pool pump A quiet four-figure annual cost in many sunbelt homes.

~1,100 W · 6h/day →

Hot tub Mostly a water heater that lives outside.

~3,000 W · 3h/day →

Electric sauna A big heater used in short sessions.

~6,000 W · 1h/day →

Gaming PC A serious rig under load is a real appliance.

~450 W · 4h/day →

Television Modern TVs are cheap to run — size and brightness matter.

~100 W · 5h/day →

Home server 24/7 duty makes even modest watts add up.

~100 W · 24h/day →

EV home charging Cost per mile, per full charge, and per month of driving.

1,000 mi/month · 28 kWh/100 mi · 12% charging losses →