When.com Web Search

Search results

1. Results From The WOW.Com Content Network

2. Furnace (central heating) - Wikipedia

   en.wikipedia.org/wiki/Furnace_(central_heating)

   The second category of furnace is the forced-air having atmospheric burner style with a cast-iron or sectional steel heat exchanger. Through the 1950s and 1960s, this style of furnace was used to replace the big, natural draft systems, and was sometimes installed on the existing gravity duct work.

3. Electric arc furnace - Wikipedia

   en.wikipedia.org/wiki/Electric_arc_furnace

   An electric arc furnace used for steelmaking consists of a refractory-lined vessel, usually water-cooled in larger sizes, covered with a retractable roof, and through which one or more graphite electrodes enter the furnace. [6] The furnace is primarily split into three sections: the shell, which consists of the sidewalls and lower steel "bowl";

4. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   Some flexible duct markets prefer to avoid using flexible duct on the return air portions of HVAC systems, however flexible duct can tolerate moderate negative pressures. The UL181 test requires a negative pressure of 200 Pa. To use flexible ducting in a system, make sure to pull the duct tight so you get the full internal diameter.

5. AOL.com - News, Sports, Weather, Entertainment, Local & Lifestyle

   www.aol.com

   AOL latest headlines, entertainment, sports, articles for business, health and world news.

6. Dust collector - Wikipedia

   en.wikipedia.org/wiki/Dust_collector

   The inner vortex, created near the bottom of the cyclone, spirals upward and carries finer dust particles. [ citation needed ] Multiple-cyclone separators consist of a number of small-diameter cyclones, operating in parallel and having a common gas inlet and outlet, as shown in the figure, and operate on the same principle as single cyclone ...

7. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   The Emerson "Heat Fan", the first ceiling fan to use a stack motor A close-up of the dropped flywheel on a FASCO "Charleston" ceiling fan Stack-motor ceiling fans. In the late 1970s, due to rising energy costs prompted by the energy crisis , Emerson adapted their "K63" motor, commonly used in household appliances and industrial machinery, to be ...