Utilities & Refuse/Waste Metrics

Definitions:

                Kilowatt Hour. A unit of energy or work equal to 1,000 watt-hours or 3.6 megajoules (where 1 joule equals 1 watt per second). The kilowatt hour (kWh) is commonly used to measure electric energy.

                Therm. A unit of heat energy equal to 100,000 British thermal units (BTU); 1 BTU is the heat required to raise the temperature of one pound of water by 1 degree Fahrenheit or 0.56 degree Celsius. Stating the energy content of various fuels in BTU allows for accurate comparisons between fuels. Natural gas in the U.S.is measured by volume in cubic feet rather than by energy content. The therm can be used to measure natural gas usage and to convert the volume of gas used to its heat equivalent: 1 therm = 96.7 cubic feet of natural gas or 29.3 kilowatt hours.

                Mlb. This represents a traditional unit of mass for steam equivalent to 1,000 pounds.

                Ton Hour. A unit of weight or volume used to measure chilled water. Chilled water is typically used in HVAC units.

                                1 Ton                     =                             2,000lbs (907kg) in U.S.

                                1 Ton                     =                             2,240lbs (1,016kg) in U.K.

                                1 Ton                     =                             2,204lbs (1,000kg) in International System of Units

                1 Ton Hour of cooling capacity = 12,000 BTU/hour or 3.5169 kWh (where 3,412

BTU/hour = 1 kWh)