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2. HVAC control system - Wikipedia

   en.wikipedia.org/wiki/HVAC_control_system

   More complex HVAC systems can interface to Building Automation System (BAS) to allow the building owners to have more control over the heating or cooling units. [3] The building owner can monitor the system and respond to alarms generated by the system from local or remote locations.

3. Reflections of signals on conducting lines - Wikipedia

   en.wikipedia.org/wiki/Reflections_of_signals_on...

   A time-domain reflectometer; an instrument used to locate the position of faults on lines from the time taken for a reflected wave to return from the discontinuity.. A signal travelling along an electrical transmission line will be partly, or wholly, reflected back in the opposite direction when the travelling signal encounters a discontinuity in the characteristic impedance of the line, or if ...

4. Forced-air gas - Wikipedia

   en.wikipedia.org/wiki/Forced-air_gas

   Older furnaces sometimes relied on gravity instead of a blower to circulate air. [1]Gas-fired forced-air furnaces have a burner in the furnace fueled by natural gas.A blower forces cold air through a heat exchanger and then through duct-work that distributes the hot air through the building. [2]

5. AOL Mail

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   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!

6. AOL Mail for Verizon Customers - AOL Help

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   AOL Mail welcomes Verizon customers to our safe and delightful email experience!

7. Both Commanders kickers miss practice for same reason: A wife ...

   www.aol.com/sports/both-commanders-kickers-miss...

   The Washington Commanders have one kicker on their active roster, Zane Gonzalez, and one more kicker on their practice squad, Greg Joseph. They both missed work for the same reason on Wednesday.