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2. Air source heat pump - Wikipedia

   en.wikipedia.org/wiki/Air_source_heat_pump

   An air source heat pump (ASHP) is a heat pump that can absorb heat from air outside a building and release it inside; it uses the same vapor-compression refrigeration process and much the same equipment as an air conditioner, but in the opposite direction. ASHPs are the most common type of heat pump and, usually being smaller, tend to be used ...

3. Variable refrigerant flow - Wikipedia

   en.wikipedia.org/wiki/Variable_refrigerant_flow

   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 ...

4. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   Air conditioning can be achieved using a mechanical 'air conditioner' or by other methods, including passive cooling and ventilative cooling. [2][3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC). [4] Heat pumps are similar in many ways to air conditioners, but ...

5. Matching dinosaur footprints found more than 3,700 miles apart

   www.aol.com/matching-dinosaur-footprints-found...

   The more than 260 footprints researchers studied were found impressed into mud and silt along ancient rivers and lakes, with more than 3,700 miles separating the ones in South America and Africa ...

6. Royal Caribbean, Carnival Cruise alter itineraries to avoid ...

   www.aol.com/royal-caribbean-carnival-cruise...

   (This story was updated to add new information.) Cruise lines are changing Caribbean itineraries in an effort to avoid Hurricane Helene.. The storm is expected to make landfall in the U.S. as a ...

7. Helene's explosive forecast one of the 'most aggressive' in ...

   www.aol.com/helenes-explosive-forecast-one-most...

   The National Hurricane Center's forecast cone for Tropical Storm Helene as of Sept. 24, 2024, at 2 p.m.