Heat Output. The most efficient space heater is one that's sized appropriately for the space it's being asked to heat. The heat output of space heaters varies widely, typically between 10,000 and 40,000 British thermal units per hour, and higher heat output comes at the cost of higher energy usage.
1. the act of impeaching; condition of being impeached. 2. (in the U.S. Congress or a state legislature) the presentation of charges against a public official by the lower house, with trial to be before the upper house.
Andrew Johnson was the first President of the United States of America to be impeached. On April 15, 1865, John Wilkes Booth assassinated President Abraham Lincoln. Vice President Andrew Johnson became president. Johnson's presidential administration was contentious and led to his impeachment.