A city charter or town charter (generically, municipal charter) is a legal document establishing a municipality such as a city or town. The concept developed in Europe during the middle ages and is considered to be a municipal version of a constitution.ith the notable exceptions of the City of London Corporation and the Laugharne Corporation, the term has fallen out of favour in the United Kingdom, but the concept remains central to local government in the United Kingdom, as well as former British colonies such as India and Canada.
120 Gallon Tank. A standard 120 gallon tank holds 96 gallons of propane and is generally installed for residential hot water or space heating with sufficient storage if you add a range or clothes dryer. Each tank is 54.5â in height and 30â in diameter. Also known as a 420 lb.
1 gallon of propane is about 90,000 BTU/hour.   : A 20 lb tank holds a little more than 4 gallons.   : My patio propane fireplace is 60,000 BTU. At full blast, a 20 lb t â¦ ank will last about 6-7 hours, which is really close to the calculation.he MH80CV, part of the Mr. Heater Contractor Series, is a 30,000-80,000 BTU Propane Convection heater. The MH80CV provides reliable heat for areas up to 1900 sq. feet. It wil â¦ l operate for up to 14 hours on a 20-lb propane tank.