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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 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 [10] indoor condenser heat exchanger coils. They transfer the heat into the indoor air, or an indoor heating system such as water ...

4. Daikin - Wikipedia

   en.wikipedia.org/wiki/Daikin

   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. [18] [needs update] [19]

5. 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.

6. College Football Playoff bracket: 12 things to know about the ...

   www.aol.com/sports/college-football-playoff...

   Nearly seven years in the making, the 12-team expanded College Football Playoff made its debut on Sunday with the reveal of the final rankings.. Plenty was expected. For instance, the four highest ...

7. 22 arrested in Pennsylvania in connection to alleged human ...

   www.aol.com/22-arrested-pennsylvania-connection...

   Twenty-two people were arrested in Pennsylvania in connection to a human trafficking operation tied to two massage businesses, officials said.. The District Attorney for Cumberland County ...

8. Heat pump - Wikipedia

   en.wikipedia.org/wiki/Heat_pump

   In general, heat pumps work most efficiently (that is, the heat output produced for a given energy input) when the difference between the heat source and the heat sink is small. When using a heat pump for space or water heating, therefore, the heat pump will be most efficient in mild conditions, and decline in efficiency on very cold days.

9. Explainer-How quickly can Trump's Musk-led efficiency panel ...

   www.aol.com/news/explainer-quickly-trumps-musk...

   Elon Musk and Vivek Ramaswamy, who were tapped by Republican President-elect Donald Trump to lead a new Department of Government Efficiency, have revealed plans to wipe out scores of federal ...