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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.
Panasonic Electric Works Co., Ltd. (パナソニック電工株式会社, named "Matsushita Electric Works, Ltd. (松下電工株式会社, MEW)" until September 30, 2008) is a Japanese company specializing in the production of industrial devices. It can trace its beginnings to a firm that was founded in 1918 by Konosuke Matsushita.
The thermostat controls the fan speed and/or the flow of water or refrigerant to the heat exchanger using a control valve. Due to their simplicity, flexibility, and easy maintenance, fan coil units can be more economical to install than ducted 100% fresh air systems (VAV) or central heating systems with air handling units or chilled beams. FCUs ...
Diagramatic operation of a thermal wheel Ljungström Air Preheater by Swedish engineer Fredrik Ljungström (1875–1964). A thermal wheel, also known as a rotary heat exchanger, or rotary air-to-air enthalpy wheel, energy recovery wheel, or heat recovery wheel, is a type of energy recovery heat exchanger positioned within the supply and exhaust air streams of air-handling units or rooftop ...
Joseph Orapallo, 57, and his 22-year-old son, Frank Orapallo, were nabbed early Wednesday when the NYPD Financial Crimes Task Force carried out the raid on their Staten Island home, according to ...
A thermal expansion valve is a key element to a heat pump; this is the cycle that makes air conditioning, or air cooling, possible.A basic refrigeration cycle consists of four major elements: a compressor, a condenser, a metering device and an evaporator.
Over the following years, Tour & Andersson extended its product range to include an integrated access control system and hotel management & signal system in 1980 and 1981 respectively. In 1987 it released Micro 7, an IBM PC-based control system with an easier user interface than previously available. It was operated with a mouse in a similar ...
Panasonic Avionics Corporation (PAC) designs, engineers, manufactures, sells and installs customized in-flight entertainment and communications devices to airlines worldwide. It is a subsidiary of Panasonic Corporation of North America , the principal North American subsidiary of Panasonic Corporation , and operates under the umbrella of the ...
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