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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.
A typical commercial air curtain enclosure. In North America, the more commonly-used term for an air door is "air curtain". The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) defines an air door as follows: "In its simplest application, an air curtain is a continuous broad stream of air circulated across a doorway of a conditioned space.
A kitchen hood, exhaust hood, hood fan, extractor hood, or range hood is a device containing a mechanical fan that hangs above the stove or cooktop in the kitchen. It removes airborne grease, combustion products, fumes, smoke, heat, and steam from the air by evacuation of the air and filtration. [ 1 ]
A big 100.5-kWh battery (93.9 kWh usable) is standard, but Dodge only claims an underwhelming 241 miles of range from it. So efficiency isn't the Charger's strongest suit.
After the control of air flow and temperature was standardized, the use of electromechanical relays in ladder logic to switch dampers became standardized. Eventually, the relays became electronic switches, as transistors eventually could handle greater current loads. By 1985, pneumatic controls could no longer compete with this new technology ...
The earliest implementation in Sweden used a fan mounted in a window, rather than a door. [4] By 1979, similar window-mounted measurement techniques were being pursued in Texas, and door-mounted test fans were being developed by a team at Princeton University to help them find and fix air leaks in homes in a Twin Rivers, New Jersey housing ...
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An adequate kitchen ventilation system should: Remove cooking fumes at the source, i.e. as close as possible to the cooking equipment. Remove excess hot air and introduce cool clean air, maintaining a comfortable environment.
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