Daikin Industries,Ltd. is a Japanese multinational air conditioner manufacturing company headquartered in Osaka. It has operations in Japan, China, Australia, India, Southeast Asia, Europe, North America, and South America.

Daikin is the inventor of Variable Refrigerant Flow (VRF) air conditioning systems (These systems are called Variable Refrigerant Volume or VRV by Daikin) and an innovator in the Split System Air Conditioning Market.

Daikin Industries Ltd was founded in 1924 as Osaka Kinzoku Kogyosho LP by Akira Yamada. In 1953, Daiflon or polychlorotrifluoroethylene was developed. In 1963 the company was renamed Daikin Kogyo Co Ltd and developed Neoflon. In 1982 it was renamed to the current Daikin Industries Ltd. In November 2006 Daikin purchased OYL Industries. This made Daikin the second largest HVAC manufacturer in the world after Carrier Corporation.

In 2008 Daikin purchased a 75% share of All World Machinery Supply based on Harvard, Illinois. Daikin developed the hybrid hydraulic systems using technology from their Air Conditioning division. Facing the global demands on CO2 reductions and the serious energy issues facing the world, this product aims to cut energy consumption in the manufacturing sector. As of April 2014, Daikin Hydraulics marketed a line of piston pumps, vane pumps, manual pumps, solenoid valves, and flow and control valves claiming their pump technology to be 50–70 percent more energy efficient than conventional technology.

In August 2012 Daikin agreed to acquire Goodman Global from the San Francisco-based private equity firm Hellman & Friedman for $3.7 billion, after first planning to buy Goodman the previous year. In January 2011, Daikin had announced plans to buy Goodman Global at approximately US $4 billion valuation, however, the plans were put off following the 2011 T?hoku earthquake and tsunami The acquisition was expected to expand Daikin's presence in the United States and in duct-type and split-system air-conditioners, and was expected to make Daikin the world's largest maker of heating, ventilation and air-conditioning systems.

Daikin opened its first American manufacturing facility—employing about 250 people in a 525,000 square feet (48,800 m2) facility in Houston, Texas—in 2013.

Daikin is the official sponsor of Galatasaray Daikin women's volleyball team.

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