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2. Register (air and heating) - Wikipedia

   en.wikipedia.org/wiki/Register_(air_and_heating)

   During winter months, for example, an air conditioning register can be closed to prevent cold air from being pulled from the room. This allows the hot air to mix more completely with the cold air in the room, improving the efficiency of the HVAC system. [7] (The return should be efficient enough to draw off the cooler air.) [10] [11]

3. Mechanical systems drawing - Wikipedia

   en.wikipedia.org/wiki/Mechanical_systems_drawing

   Purpose made brackets for supporting service or plant/equipment to a scale of not less than 1:50; Accesses into ceilings, ducts, etc. at a scale of not less than 1:50; Special fixings, inserts, brackets, anchors, suspensions, supports etc. at a scale of not less than 1:20; Sleeves, puddle flanges, access chambers at a scale not less than 1:20

4. Packaged terminal air conditioner - Wikipedia

   en.wikipedia.org/wiki/Packaged_terminal_air...

   Packaged terminal air conditioner installed in a residential apartment. A packaged terminal air conditioner (PTAC) is a type of self-contained heating and air conditioning system intended to be mounted through a wall. [1] The first practical semi-portable air conditioning unit invented by engineers at Chrysler Motors. It entered the market in ...

5. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Central, "all-air" air-conditioning systems (or package systems) with a combined outdoor condenser/evaporator unit are often installed in North American residences, offices, and public buildings, but are difficult to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. [32] (Minisplit ...

6. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [61]

7. How to shop safely on Cyber Monday, throughout holiday season

   www.aol.com/shop-safely-cyber-monday-throughout...

   Black Friday weekend and Cyber Monday offer great sales. But scammers are looking to steal your money with fake deals. Learn how to protect yourself.

8. HVAC control system - Wikipedia

   en.wikipedia.org/wiki/HVAC_control_system

   HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...

9. Royal Insider Reveals a Secret About Kate Middleton's ...

   www.aol.com/lifestyle/royal-insider-reveals...

   Kate Middleton's annual Christmas Carol on Friday, December 6 included numerous members of the extended royal family in attendance.. Sophie Winkleman, who is married to Lord Frederick Windsor, the ...