Highly social, Prairie Dogs live in large colonies called âtownsâ and in collections of families that can span hundreds of acres. A Prairie Dog town may contain 15 to 26 family groups, made up of a series of burrows with mounded entrances. Mother Prairie Dogs provide most of the care for the young.
BTU, or British thermal unit, is the industry-standard used to measure the heating efficiency of furnaces. In addition to BTU ratings, furnace manufacturers might include a Manual J Load rating and a percentage of energy efficiency.
A Btu (British Thermal Unit) is the amount of energy required to raise the temperature of one pound of water one degree Fahrenheit. Table 1 shows the Btu value for various energies. To compare the values on a propane equivalent we first convert the values to a MMBtu (1 million Btuâs). You take the energyâs price and divide it by its MMBtuâs. Natural gas is priced on a MMBtu basis. We then multiply the amount of propane Btu content per MMBtu (.0915) to get the propane equivalent value.