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  2. Olympus Pen F - Wikipedia

    en.wikipedia.org/wiki/Olympus_Pen_F

    Since this one-piece shutter opens fully before it starts to close, ... 100mm 24° 5-6 0.5-7 2–22 0.8m 43mm 230g E.Zuiko Auto-T 100mm F3.5 140mm 17° 4-5

  3. Window fan - Wikipedia

    en.wikipedia.org/wiki/Window_fan

    A small twin window fan with thermostat A large single whole-house window fan with three-speed control and intake/exhaust switch The same fan, in operation. A window fan is a fan designed to be placed inside the frame of a window. Window fans have been used for many decades to maintain comfortable temperatures and ventilation within one's home ...

  4. 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 ...

  5. KDK - Wikipedia

    en.wikipedia.org/wiki/KDK

    The first attempt was in 1983 when U.S.-based Patton Industries imported the electric oscillating fans, relabeled them "KDK by Patton", and the ceiling fans were then relabeled "RoyalAire" by Sumitomo America, one of Matsushita's banks, shareholders and insurance providers. This was a failure as the products never caught on with consumers.

  6. Fan coil unit - Wikipedia

    en.wikipedia.org/wiki/Fan_coil_unit

    A fan coil unit (FCU), also known as a Vertical Fan Coil Unit (VFCU), is a device consisting of a heat exchanger (coil) and a fan. FCUs are commonly used in HVAC systems of residential, commercial, and industrial buildings that use ducted split air conditioning or central plant cooling.

  7. Fire damper - Wikipedia

    en.wikipedia.org/wiki/Fire_damper

    EN 1634-1 Access Portal: Fire resistance and smoke control tests for door and shutter assemblies, openable windows and elements of building hardware - Part 1: Fire resistance test for door and shutter assemblies and openable windows; Abstract DIN EN 15650:2010-09 Ventilation for buildings - Fire dampers; German version EN 15650:2010