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All modern air conditioning systems, even small window package units, are equipped with internal air filters. [citation needed] These are generally of a lightweight gauze-like material, and must be replaced or washed as conditions warrant. For example, a building in a high dust environment, or a home with furry pets, will need to have the ...
The packaged terminal air conditioner (PTAC), through-the-wall, and window air conditioners are similar. These units are installed on a window frame or on a wall opening. The unit usually has an internal partition separating its indoor and outdoor sides, which contain the unit's condenser and evaporator, respectively.
These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.
Liverpool rose to global economic importance at the forefront of the Industrial Revolution in the 19th century and was home to the first intercity railway, the first non-combustible warehouse system (the Royal Albert Dock), and a pioneering elevated electrical railway; it was granted city status in 1880 and was moved from Lancashire to the ...
USAF KC-135 suffered a failure of a sighting window next to the sextant port in the cockpit during a trans-Atlantic flight. A boom operator died when he was sucked partway through the 10-inch by 8-inch window opening as the cockpit depressurized. None of the 17 others on board were injured. [120] 31 January 1989
A small square-framed clock is installed in the ceiling near Tracks 108 and 109. It was manufactured at an unknown time by the Self Winding Clock Company , which made several others in the terminal. The clock hung inside the gate at Track 19 until 2011, when it was moved so it would not be blocked by lights added during upper-level platform ...
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