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English: An air conditioning unit: The coils and pipes in an air conditioning unit contain refrigerant gas. The refrigerant gas enters the compressor as warm, low-pressure gas and leaves it as hot, high-pressure gas. In the condenser coils, hot, compressed refrigerant gas loses heat to the outdoor air and becomes liquid while it is still warm.
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 air conditioning system, or a standalone air conditioner, provides cooling and/or humidity control for all or part of a building. Air conditioned buildings often have sealed windows, because open windows would work against the system intended to maintain constant indoor air conditions.
GREE Electric's Chairwoman is Dong Mingzhu, or "Sister Dong" as she is known in China. [2] She was appointed CEO in 2009. [citation needed] She joined the company in 1990.[citation needed] Dong was also the Chairwoman of its largest shareholder at the time, GREE Group, until November 2016. [8]
File:Hong Kong Railway Route Map en.svg is a vector version of this file. It should be used in place of this PDF file when not inferior. It should be used in place of this PDF file when not inferior. File:Hong Kong Railway Route Map en.pdf → File:Hong Kong Railway Route Map en.svg
It runs 24 hours a day and is the primary hub for Cathay Pacific, Greater Bay Airlines, Hong Kong Airlines, HK Express, and Air Hong Kong (cargo carrier). The airport is one of the hubs of Oneworld, and also one of the Asia-Pacific cargo hubs for UPS Airlines. [7] It is a focus city for China Airlines and China Eastern Airlines.
In Hong Kong, the main electrical wiring system used is BS 1363. In old buildings, the BS 546 system is also common. Due to its proximity to mainland China, electrical products from there are present in Hong Kong, especially those as a result of cross-border purchase carried out by mainland Chinese immigrants. Nevertheless, even if the product ...
File:Hong Kong Railway Route Map en.svg → File:Hong Kong Railway Route Map en.pdf For more information about PDF, read about Portable Document Format and PDF to image files . čeština ∙ English ∙ español ∙ français ∙ 日本語 ∙ македонски ∙ português do Brasil ∙ slovenščina ∙ 中文（简体） ∙ 中文 ...