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Zhang Ruimin was born on January 5, 1949, to a working class family in Qingdao, Shandong; his parents were employed in a local garment factory. [5] As a youth, Zhang joined the Red Guards, visited Mao's birthplace, and attended rallies in Beijing since all schools had been closed, and when the movement was finally disbanded, he was able to avoid being sent down to the countryside.
In 1991, the company changed its name to "Qingdao Haier Group" and acquired Qingdao Air Conditioner Plant and Qingdao Freezer. [8] The company's name was simplified to its current name "Haier" in 1992. [8] In 1995, the company took over Qingdao Red Star Electronics Co., a washing machine manufacturer, along with five of its subsidiaries. [12]
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]
Chilled water is a commodity often used to cool a building's air and equipment, especially in situations where many individual rooms must be controlled separately, such as a hotel. The chilled water can be supplied by a vendor, such as a public utility , or created at the location of the building that will use it, which has been the norm.
Hydronics (from Ancient Greek hydro- 'water') is the use of liquid water or gaseous water or a water solution (usually glycol with water) as a heat-transfer medium in heating and cooling systems. [ 1 ] [ 2 ] The name differentiates such systems from oil and refrigerant systems.
It is the world's largest residential air-conditioner manufacturer. [3] The company offers two types of air conditioners: household air conditioners and commercial air conditioners. The company also produces electric fans, water dispensers, heaters, rice cookers, air purifiers, water kettles, humidifiers and induction cookers, among other products.