Estate for years. An estate for years is one which is to continue for a definite period fixed in advance by. agreement between landlord and tenant. The name is somewhat misleading because the period may be for less. than a year, measured in specific days, weeks, or months. Estate from period to period. An estate from period to period (or periodic tenancy) is one which continues for. periods of time (typically year-to-year, month-to-month, or week-to-week) as designated by landlord and tenant. in their agreement. The most common periodic tenancy is the month-to-month tenancy.
You will still require 8.34 BTU to raise the temperature of a gallon of water one degree F. 1  I say approximately because the weight of water varies slightly with its temperature. 2  Water is at its densest at 4 degrees Celsius (39 degrees F). 3  A gallon of water at temperatures above and below that value will weigh less.
It takes one Btu per pound of water to raise the temperature by one degree Fahrenheit. The standard size of American hot water heaters is 40 gallons, and each gallon of water weighs 8.33 pounds. Calculate the Btu. If you have a 40-gallon water heater, that is 40 multiplied by 8.33, or 333.2 pounds of water. So you need 333.2 Btu to raise the water 1 degree Fahrenheit. However, most areas need more than one degree of heat added to the water to make it warm enough for showering or washing clothes or dishes.