What Is HVAC Ductwork?

HVAC is the English abbreviation of Heating, Ventilation and Air Conditioning, which is heating ventilation and air conditioning. It represents not only the disciplines and technologies mentioned above, but also the industries and industries involved in the above disciplines and technologies. HVAC also refers to an applied discipline, which has a wide influence in the world's architectural design and engineering and manufacturing. There are HVAC associations in various countries, and the HVAC branch of the Chinese Architectural Association is the official representative body of China. Heat transfer, engineering thermodynamics, and fluid mechanics are the basic theoretical foundations, and its research and development direction is to provide a more comfortable working and living environment for human beings.


An air conditioning system is a control system that includes temperature, humidity, air cleanliness, and air circulation. It is called HVAC (English: Heating, Ventilation, Air-conditioning and Cooling).
The principle of air conditioner supplying cold air, heating or dehumidification is similar. The refrigerant is used to evaporate or condense under the action of the compressor, thereby causing the surrounding air to evaporate or condense to achieve the purpose of changing temperature and humidity. It is worth noting that the "heater" is a rare and excellent device with a thermal efficiency greater than 1 (if the "greenhouse effect" is not considered). This makes it right
The power of air-conditioning equipment is usually expressed in the United States by the term "cold ton". A "cold ton" is defined as: to cool a "short ton" (en: short ton, equal to 2000 pounds or 907 kg) of ice Hours to dissolve the required cooling power. It is equal to 12,000 BTUs / hour or 3510 Watts [2]. The central air-conditioning system of private houses (detached villa buildings) usually has a capacity of 1 to 5 cold tons.
Air conditioning in cars requires about 5 horsepower (4 kW) of power in the AC / DC system conversion.


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