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2. Variable refrigerant flow - Wikipedia

   en.wikipedia.org/wiki/Variable_refrigerant_flow

   Variable refrigerant flow (VRF), also known as variable refrigerant volume (VRV), is an HVAC technology invented by Daikin Industries, Ltd. in 1982. [1] Similar to ductless mini-split systems, VRFs use refrigerant as the primary cooling and heating medium, and are usually less complex than conventional chiller -based systems.

3. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   Evaporator, indoor unit, or terminal, side of a ductless split-type air conditioner. Ductless systems (often mini-split, though there are now ducted mini-split) typically supply conditioned and heated air to a single or a few rooms of a building, without ducts and in a decentralized manner. [62]

4. Daikin - Wikipedia

   en.wikipedia.org/wiki/Daikin

   Daikin Industries Ltd was founded in 1924 as Ōsaka Metalworking Industries LP (大阪金属工業所, Ōsaka Kinzoku Kōgyōsho) by Akira Yamada. In 1953, Daiflon or polychlorotrifluoroethylene was developed. In 1963 the company was renamed Daikin Industries, Ltd. (ダイキン工業株式会社, Daikin Kōgyō Kabushiki-gaisha, Daikin ...

5. Seasonal energy efficiency ratio - Wikipedia

   en.wikipedia.org/wiki/Seasonal_energy_efficiency...

   Today there are mini-split (ductless) air conditioner units available with SEER ratings up to 42. [10] [11] During the 2014 AHR Expo, Mitsubishi unveiled a new mini-split ductless AC unit with a SEER rating of 30.5. [12] GREE also released a 30.5 SEER rating mini split in 2015 as well. [13]

6. Air source heat pump - Wikipedia

   en.wikipedia.org/wiki/Air_source_heat_pump

   The main components of a split-system (called split as there are both inside and outside coils) air source heat pump are: An outdoor evaporator heat exchanger coil, which extracts heat from ambient air; One or more [9] indoor condenser heat exchanger coils. They transfer the heat into the indoor air, or an indoor heating system such as water ...

7. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   t. e. A heat pump is a device that consumes energy (usually electricity) to transfer heat from a cold heat sink to a hot heat sink. Specifically, the heat pump transfers thermal energy using a refrigeration cycle, cooling the cool space and warming the warm space. [1] In cold weather, a heat pump can move heat from the cool outdoors to warm a ...