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2. 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 ...

3. Fan coil unit - Wikipedia

   en.wikipedia.org/wiki/Fan_coil_unit

   These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.

4. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

5. Automotive air conditioning - Wikipedia

   en.wikipedia.org/wiki/Automotive_air_conditioning

   In a thermal expansion valve air conditioning system, the condensed and pressurized liquid refrigerant is next routed through the receiver-drier, that is, a one-way desiccant and filter cartridge that both dehydrates the refrigerant and compressor lubricant oil mixture to remove any residual water content (which would become ice inside the ...

6. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   This is partly because ice forms on the outdoor unit's heat exchanger coil, which blocks air flow over the coil. To compensate for this, the heat pump system must temporarily switch back into the regular air conditioning mode to switch the outdoor evaporator coil back to the condenser coil, to heat up and defrost. Therefore, some heat pump ...

7. New Mexico teen accused of killing his parents, siblings with ...

   www.aol.com/news/mexico-teen-accused-killing...

   Police say Leyva called 911 at around 3:30 a.m. to report that he had killed his family in their home in Belen, New Mexico, a small town about 33 miles south of Albuquerque.

8. At least 5 shows canceled after drones fell from the sky at ...

   www.aol.com/least-5-shows-canceled-drones...

   At least five drone shows have been canceled, or have paused the use of the systems, after several drones struck a crowd at a holiday show in Orlando on December 21.. Universal Orlando, Orlando ...

9. Child rape and violent incidents reported at Massachusetts ...

   www.aol.com/child-rape-violent-incidents...

   A former director at a Massachusetts migrant shelter is speaking out against what he says were incidents of widespread violence, child sexual assault and rape at shelters in the state, including ...