A ton is the measure中央空调;中央空调;中央空调;of the cooling capacity of an air-conditioning unit. It is杭州中央空调;杭州中央空调;杭州中央空调;an indication of the rate that the unit removes大金中央空调;大金中央空调;大金中央空调;heat from a building. One ton of air conditioning密集柜;密集柜;密集柜;removes 12,000 British thermal units (Btu) of heat an hour密集架;密集架;密集架;.The term was derived from the time when ice was used for refrigeration. One ton汽车陪练;汽车陪练;汽车陪练;of air-conditioner cooling capacity removes the same amount of heat required to melt 2,000 pounds干鸡粪;干鸡粪;干鸡粪;or one ton, of ice in 24 hours.
