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2. Drain-waste-vent system - Wikipedia

   en.wikipedia.org/wiki/Drain-waste-vent_system

   The high point of the vent system (the top of its "soil stack") must be open to the exterior at atmospheric pressure. On large system separate parallel vent stacks may also be run to ensure sufficient airflow, as the number of devices linked to an atmospheric vent and their distances from it are regulated by plumbing code.

3. Heating, ventilation, and air conditioning - Wikipedia

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

   Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space. The control circuit in a household HVAC installation.

4. Chiller - Wikipedia

   en.wikipedia.org/wiki/Chiller

   A liquid (glycol based) chiller with an air cooled condenser on the rooftop of a medium size commercial building. In air conditioning systems, chilled coolant, usually chilled water mixed with ethylene glycol, from a chiller in an air conditioning or cooling plant is typically distributed to heat exchangers, or coils, in air handlers or other types of terminal devices which cool the air in ...

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. 15 Black Friday deals that are worth the splurge: Le Creuset ...

   www.aol.com/lifestyle/11-black-friday-deals-that...

   The Cocoon by Sealy is an excellent cooling mattress ideal for sleepers who run hot or live in warmer climates. The Cocoon Chill usually costs over $1,000, but during Black Friday, it's down to ...

7. Attic fan - Wikipedia

   en.wikipedia.org/wiki/Attic_fan

   An attic fan installed underneath a roof. A powered attic ventilator, or attic fan, is a ventilation fan that regulates the heat level of a building's attic by exhausting hot air. A thermostat is used to automatically turn the fan off and on, while sometimes a manual switch is used. An attic fan can be gable mounted or roof mounted. Additional ...