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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 ]
Closing the sash on a non-bypass CAV hood will increase face velocity (inflow velocity or "pull"), [a] which is a function of the total volume divided by the area of the sash opening. Thus, the hood's performance (from a safety perspective) depends primarily on sash position, with safety increasing as the hood is drawn closed.
Some workers prefer the opposite arrangement, where vapors flow down the wall of the trap, and are sucked up the inner tube; this reduces blockage. [ 1 ] In vacuum applications, a cold trap is a device that condenses all vapors except the permanent gases (hydrogen, oxygen, and nitrogen) into a liquid or solid.
Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space.
The garden wall and ha-ha are in stone. The ha-ha has flat coping, it is about 0.75 metres (2 ft 6 in) high, and curves in a bow. It ramps up to the garden wall which is between 1.5 metres (4 ft 11 in) and 3 metres (9.8 ft) high. The wall contains a gateway with square piers on plinths with chamfered capstones. [18] II: Whitehorse View and The ...
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.