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2. Furnace (central heating) - Wikipedia

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

   By comparison, most modern "warm air" furnaces typically use a fan to circulate air to the rooms of house and pull cooler air back to the furnace for reheating; this is called forced-air heat. Because the fan easily overcomes the resistance of the ductwork, the arrangement of ducts can be far more flexible than the octopus of old. In American ...

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. Internal fan-cooled electric motor - Wikipedia

   en.wikipedia.org/wiki/Internal_fan-cooled...

   An internal fan-cooled electric motor (colloquially, fan-cooled motor) is a self cooling electric motor.Fan cooled motors feature an axial fan attached to the rotor of the motor (usually on the opposite end as the output shaft) that spins with the motor, providing increased airflow to the motor's internal and external parts which aids in cooling.

5. Electric arc furnace - Wikipedia

   en.wikipedia.org/wiki/Electric_arc_furnace

   An electric arc furnace (EAF) is a furnace that heats material by means of an electric arc. Industrial arc furnaces range in size from small units of approximately one-tonne capacity (used in foundries for producing cast iron products) up to about 400-tonne units used for secondary steelmaking.

6. List of DIN standards - Wikipedia

   en.wikipedia.org/wiki/List_of_DIN_standards

   Hose clamps with worm gear drive; shape A, DIN 3017-2: Hose clamps – Part 2: Clamps with fastening lugs, DIN 3017-3: Hose clamps – Part 3: Bolt clamps, DIN 3017-4: Hose clamps – Part 4: Technical delivery conditions, DIN 3017-5: Hose clamps – Part 5: Wide strip hose clamps with fastening lugs; Types D and E, DIN 3113: Combination Wrench ...

7. Duct (flow) - Wikipedia

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

   Ducts for air pollution control in a 17000 standard cubic feet per minute regenerative thermal oxidizer (RTO). A round galvanized steel duct connecting to a typical diffuser Fire-resistance rated mechanical shaft with HVAC sheet metal ducting and copper piping, as well as "HOW" (Head-Of-Wall) joint between top of concrete block wall and underside of concrete slab, firestopped with ceramic ...