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2. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   The first mini-split system was sold in 1961 by Toshiba in Japan, and the first wall-mounted mini-split air conditioner was sold in 1968 in Japan by Mitsubishi Electric, where small home sizes motivated their development. The Mitsubishi model was the first air conditioner with a cross-flow fan.

3. Gree Electric - Wikipedia

   en.wikipedia.org/wiki/Gree_Electric

   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.

4. Combined cycle power plant - Wikipedia

   en.wikipedia.org/wiki/Combined_cycle_power_plant

   The turbine exhaust is already hot, so a regenerative air preheater is not required as in a conventional steam plant. However, a fresh air fan blowing directly into the duct permits a duct-burning steam plant to operate even when the gas turbine cannot. Without supplementary firing, the thermal efficiency of a combined cycle power plant is ...