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The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [61]
An evaporative cooler (also known as evaporative air conditioner, swamp cooler, swamp box, desert cooler and wet air cooler) is a device that cools air through the evaporation of water. Evaporative cooling differs from other air conditioning systems, which use vapor-compression or absorption refrigeration cycles.
Central, "all-air" air-conditioning systems (or package systems) with a combined outdoor condenser/evaporator unit are often installed in North American residences, offices, and public buildings, but are difficult to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. [32] (Minisplit ...
According to the Economic complexity index, Pakistan is the 67th largest export economy in the world and the 106th most complex economy. [10] During the fiscal year 2015–16, Pakistan's exports stood at US$20.81 billion and imports at US$44.76 billion, resulting in a negative trade balance of US$23.96 billion.
A ton of refrigeration (TR or TOR), also called a refrigeration ton (RT), is a unit of power used in some countries (especially in North America) to describe the heat-extraction capacity of refrigeration and air conditioning equipment.
Air-conditioner sizes are often given as "tons" of cooling, where 1 ton of cooling equals 12,000 BTU/h (3.5 kW). 1 ton of cooling equals the amount of power that needs to be applied continuously over a 24-hour period to melt 1 ton of ice. The annual cost of electric energy consumed by an air conditioner may be calculated as follows:
4.1 5.2 5.8 7.9 7.1 ... Following the international credit crisis and spikes in crude oil prices, Pakistan's economy could not ... Air Conditioners 388 471 451 518 ...
The airborne missions of the Army Special Service Group included performing the combat parachuting at the Indian airbases with an intention of launching a ground assaults in the Indian Air Force's air stations in Pathankot, Adampur, and the Halwara.: contents [16] 180 SSG commandos boarded [17] a Pakistan Air Force's C-130 Hercules, the three ...