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Ceiling Dome – the light source(s) are hidden behind a translucent dome typically made of glass, with some combination of frosting and surface texturing to diffuse the light. These can be flush-mount fixtures mounted into the ceiling, or semi-flush fixtures separated by a small distance (usually about 3–12").
They are ideal for rooms with low ceilings ranging in height between 2.286 m and 2.5908 m. A disadvantage to this design is that since the blades are mounted so close to the ceiling, air movement is greatly reduced. Some ball-and-socket fans can be mounted using a low-ceiling adapter, purchased specially from the fan's manufacturer. This allows ...
A wall-mounted shower sensor. In public facilities, the trend is toward sensor-operated (automatic) fixtures that improve hygiene and save money. For example, sensor operated automatic-flush urinals have fewer moving parts, reduce wear, and tend to last longer than manual-flush valves. Also, they ensure fixtures are flushed only once per use.
Telephone wiring from the 1970s. Low voltage cables are often laid across ceiling joists and insulation in roof cavities. Three-phase power is commonly used for industrial machines, particularly motors and high-load devices. Provision for three-phase power must be considered early in the design stage of a building because it has different ...
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.
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