When.com Web Search

Search results

1. Results From The WOW.Com Content Network

2. Heroes Tunnel - Wikipedia

   en.wikipedia.org/wiki/Heroes_Tunnel

   A 30-inch metal ventilating line was installed in each bore suspended at the height of 7 feet above the tunnel floor. The two tunnels ventilation formed a Y which at the base would contain a 36-inch reversible fan. A concrete ventilation shaft was built which is located midway between the tunnels. There is a control room at the base of the shaft.

3. Fan (machine) - Wikipedia

   en.wikipedia.org/wiki/Fan_(machine)

   A household electric fan A large cylindrical fan. A fan is a powered machine that creates airflow. A fan consists of rotating vanes or blades, generally made of wood, plastic, or metal, which act on the air. The rotating assembly of blades and hub is known as an impeller, rotor, or runner. Usually, it is contained within some form of housing ...

4. High-volume low-speed fan - Wikipedia

   en.wikipedia.org/wiki/High-volume_low-speed_fan

   A High-volume low-speed fan. A high-volume low-speed (HVLS) fan is a type of mechanical fan greater than 7 feet (2.1 m) in diameter. [1] HVLS fans are generally ceiling fans although some are pole mounted. HVLS fans move slowly and distribute large amounts of air at low rotational speed– hence the name "high volume, low speed."

5. Air Movement and Control Association - Wikipedia

   en.wikipedia.org/wiki/Air_Movement_and_Control...

   Induced flow fans are housed fans whose outlet airflow is greater than their inlet airflow due to induced airflow. They are generally used in laboratory or hazardous atmosphere exhaust applications. ANSI/AMCA Standard 300 - Reverberant Room Method for Sound Testing of Fans applies to fans of all types and sizes. It is limited to the ...

6. News, Politics, Sports, Mail & Latest Headlines - AOL.com

   firefox-startpage.aol.com

   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

7. Process duct work - Wikipedia

   en.wikipedia.org/wiki/Process_Duct_Work

   The air temperature may vary from ambient to 1000 °F (515 °C). Process ductwork is subject to large loads due to dust buildup, fan suction pressure, wind, and earthquake forces. As of 2009 30 ft diameter process ductwork may cost $7,000 per ton. Failure to properly integrate design forces may lead to catastrophic duct collapse.