*kBtu:* One thousand (1,000) British thermal units.

*Kerosene:* Certain colorless, low–sulfur oil products that
burn without producing much smoke.

*Kilovolt (kV):* Distribution lines in
residential areas usually are 12 kV or 12,000 volts. A unit of energy equivalent to one thousand volts.

*Kilowatt (kW):* A unit of measure of the
amount of electricity needed to operate given equipment. On a hot summer afternoon, a typical home,
with central air conditioning and other equipment in use, might have a demand of
four kW each hour. A unit of energy equivalent to one thousand watts.

*Kilowatthour (kWh):* A unit
of energy that measures the amount of power produced or used over a one-hour time interval. A
100-watt light bulb operating for ten hours would use one kWh of energy. A unit of energy
equivalent to one thousand watthours.