Ever wonder what wood is the best to burn as firewood? Oak is an American favorite, other hardwoods are also a good choice. You can burn other softer wood also, as long as it is split and dried long enough. It's much more important to burn dry wood than to worry about what kind of wood it is.
Air conditioners are rated by the number of British Thermal Units (Btu) of heat they can remove per hour. Another common rating term for air conditioning size is the “ton,” which is 12,000 Btu per hour.