A Fan How Much Watt

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A Fan How Much Watt

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A ceiling fan is a fan mounted on the ceiling of a room or area, usually powered by an electric drive, using hub-rotating blades to circulate the air. They effectively cool people by increasing air velocity. Unlike air conditioning units, fans do not lower air temperature or relative humidity, but create a cooling effect by helping to evaporate sweat and increasing heat exchange through convection. Fans can add a small amount of heat to the room, mainly due to the heat used by the engine, but also partly due to friction. Because cooling air is thermodynamically expensive, fans use significantly less energy than air conditioning. In winter, a ceiling fan can also be used to return naturally rising warm air to the occupants. This can improve the energy efficiency of climate control, affecting both thermostat readings and passenger comfort. Many ceiling fan units also double as lighting, eliminating the need for separate ceiling lights in the room.

Punkah style ceiling fans date back to the oldest type of fan, first created in India around 500 BC. It was cut from an Indian palmyra leaf, forming its rather large blade, which moves slowly in a pdular fashion. Manually operated by cable at startup

And today these punks, powered by a belt drive system, move air by moving it back and forth. Compared to a rotary fan, it creates a gentle breeze instead of airflow.

A ceiling fan powered by a water wheel that was originally installed in the dining room of Perry's Camp house

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The first rotary ceiling fans appeared in the US in the 1860s and early 1870s. At that time, they were not powered by any electric motor. Instead, a flowing stream of water was used with a turbine to drive a belt system that would turn the blades of a two-bladed fan assembly. These systems can accommodate multiple fan units and have therefore become popular in shops, restaurants and offices. Some of these systems survive today and can be seen in parts of the southern United States where they originally proved useful.

The electric ceiling fan was developed by Philip Diehl in 1882. He made the electric motor used in the first electrically powered Singer sewing machines and in 1882 adapted it for use in a ceiling fan. Each fan had a self-contained motor unit without a belt drive.

Due to the commercial success of the ceiling fan, it faced strong competition almost immediately. He continued to refine his offering and created a ceiling fan mounted light kit to combine both functions into one unit. Until World War I, most ceiling fans were made with four blades instead of the original two, which made the fans quieter and allowed them to circulate more air. The first unconventional companies to successfully commercialize the sale of ceiling fans in the United States were the companies known today as the Hunter Fan , Robbins & Myers, Ctury Electric, Westinghouse Corporation, and Emerson Electric.

In the 1920s, ceiling fans became commonplace in the US and began to grow internationally. From the Great Depression of the 1930s to the introduction of electric air conditioning in the 1950s, ceiling fans gradually fell out of fashion in the United States.

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In the 1960s it became almost completely obsolete in the US; the rest were considered items of nostalgia.

Meanwhile, ceiling fans have become very popular in other countries, especially in countries with hot climates such as India and the Middle East, where a lack of infrastructure and/or financial resources has made famine and complex Freon-based air conditioning impractical. In 1973 Texas Trepreur H. W. (Hub) Markwardt, Crompton Greaves, Ltd. began importing ceiling fans made in India to the US. Crompton Greaves has been manufacturing ceiling fans since 1937 through a joint venture between Greaves Cotton of India and Crompton Parkinson of Gland. These made-in-India ceiling fans were slow to start, but Markwardt's Con Industries brand ceiling fans (which stands for Energy Saving) may have been a big hit during the energy crisis of the late 1970s and early 1980s because they were used less. consumes more power than the older tinted pole motors used in many other American-made vans. Fans have become energy-saving devices for residential and commercial applications, supplementing outdoor air conditioning units with a flowing column of airflow.

Due to this renewed commercial success in the efficient use of ceiling fans as an energy saving practice, many American manufacturers have also started or are significantly increasing their production. In addition to imported ceiling fans, Casablanca Fan was founded in 1974. Other American manufacturers of the time included the Hunter Fan Co. (was a division of Robbins & Myers, Inc.), FASCO (F. A. Smith Co.), and Emerson Electric; often referred to as Sears-Roebuck. Smaller, short-lived companies include NuTone, Southern Fan Co., A&G Machinery Co., Homestead, Hallmark, Union, Lasko and Evergo.

Throughout the 1980s and 1990s, ceiling fans remained popular in the United States. Many small American importers began importing ceiling fans, many of which were short-lived. During the 1980s, the balance of sales between American-made ceiling fans and those imported from manufacturers in India, Taiwan, Hong Kong, and possibly China shifted dramatically, with imported fans taking over the majority of the market in the late 1980s. Even the simplest US-made fans sold for $200-$500, while the more expensive imported fans rarely exceeded $150.

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, bringing energy-efficient, remote/app-controlled brushless DC fans to the masses. However, significant advances in design have been made by companies such as Monte Carlo, Minka Aire, Quorum, Craftmade, Litex and Fanimation – offering ceiling fans with more decorative value at a higher price. Washington Post columnist Patricia Dane Rogers in 2001

Ceiling fans have several functions. Fans provide more uniform ambient conditions by increasing mixing in the ventilated area. Moving air is often preferred over still air, especially in warm or neutral locations, so fans are useful for increasing occupant satisfaction.

Fans can help to both heat and cool a room, as fans do not change the temperature and humidity of the air, but rather move it. As a result, ceiling fans are often an essential element of low-energy HVAC, passive cooling, or natural ventilation systems in buildings. Depending on the energy consumption of the fan system, fans can be an effective way to improve thermal comfort while maintaining a higher ambient temperature while maintaining comfort.

Ceiling fans can be operated together in a common area or separately in a home or office environment. In office settings, individually adjustable ceiling fans can have a significant positive impact on thermal comfort and have been shown to increase productivity and occupant satisfaction.

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Ceiling fans help distribute fresh air in both mechanically and naturally ventilated rooms. In naturally ventilated rooms, ceiling fans effectively draw in and circulate fresh outdoor air.

The direction of rotation of the fan should change depending on whether the room is to be heated or cooled. Unlike air conditioners, fans only move the air, they do not directly change its temperature. For this reason, ceiling fans that have a mechanism that changes the direction in which the blades push air (usually an electrical switch in the unit's switch box, garage, or shed) can help with both heating and cooling.

Although ceiling fan manufacturers (primarily Emerson) have produced electrically reversible motors since the 1930s, most fans produced before the mid-1970s are either non-reversible or mechanically reversible (have adjustable blade pitch). not an electrically reversible motor. . In this case, the blades should be slanted with the top edge to pull up and the bottom edge to pull up. Hunter's “Adaptair” mechanism is perhaps the most famous example of mechanical reversibility.

For cooling, the direction of rotation of the fan should usually be adjusted so that the air is blown downwards — usually counterclockwise from the fan side, but it depends on the manufacturer. When turning, the blades should be guided by the upper edge. The breeze generated by the ceiling fan creates a wind-chilling effect that speeds up the evaporation of sweat on the human skin and makes the body's natural cooling mechanism more efficient. Because of this phone, the air conditioner thermostat can be set a few degrees higher than normal when the fan is running,

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