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.
The British thermal unit, or BTU, is a unit of energy, one that is used to quantify the heating and cooling power of, water heaters, air conditioners and similar equipment. Definition. A BTU is the quantity of heat needed to raise one pound of water by one degree Fahrenheit. More BTUs mean more heating power. Significance A water heater is ranked by BTU input, but really means BTUs/hr; thus a 33,000 BTU heater can heat 33,000 pounds of water by one degree in an hour; or, 330 pounds by 100 degrees. Recovery Rate A more common measure for water heaters is the recovery rate, which indicates the amount of gallons of water that can be heated to 100 degrees Fahrenheit in one hour.