Home 

Face Velocity of return grill - Velocity through return grill

Technical information Air-Conditioning Return Grilles

Return Grilles

Return air grilles are usually selected for the required air volume at a given sound pressure level or value. Consumption-speed air on the face grille depends mainly on the lattice size and volume of air. Grille style and dampers have a small effect on the rate of absorption. Grille style, however, has a very large impact on the pressure drop. This, in turn, directly affects the level of noise.

Consumption rate is evident only in the immediate vicinity of return grille. It cannot influence the room air distribution. Last ASHRAE research projects have developed a scientific computerized method concerning the admission of-grille speeds, measured 1 inch from the grille face, volume of air. Lattice measurements factors directly, stress-bar, outdoor and partly closed valves technical data furnished with a lattice.

It still remains a function power outlets to set the correct lighting, air movement and thermal equilibrium. Because of this, the location of the back of the lattice is not critical, and their location can be largely a matter of convenience.

Specific locations in the ceiling may be desirable for local heat loads or smoke, or a location in the perimeter of the sill or floor, it may be desirable for the outdoor areas of the fence under window of the section of the wall. It is not desirable to locate large centralized return of the lattice in the occupied zone. Large masses of air moving through the bars can cause unpleasant air traffic among the invaders.

Return air grilles should be selected for static pressure. This pressure will provide the required rating nc and match the return system performance characteristics. Fan sound power is transmitted through the return air supply system. Fan silencer may be necessary or desirable in the opposite direction. This is especially true if silence is considered on the supply side.

Transmission gratings of ventilation in the ceiling Plenum must be remotely Plenum of the source of the noise. The use of a lining made of sheet metal elbow can reduce the transmitted sound. Lined elbows on the ventilation grills and lined General ducts on ducted return grilles you can minimize cross talk between private offices.

Distribute an unlimited flow of air is determined grill-bar deviations. Grille with vertical person bars 0-degree of deviation will have the maximum throw value. Deviation installation of vertical bands increases air flow covers a wider area and throw decreases.

Registers with adjustable valves. Air and leakage problem is compounded when the register has a rubber gaskets mounted around the lattice. When he drove up close to the wall, an airtight seal. This helps to eliminate noise. Valve must be Cam so that it will remain open, not blow closes when the air passes through it. On some registers, a simple tool can be used to change the direction of the deviation bars. This means that setting bars in the registry can result in a number of deviations patterns...

 
Thanks ->



Advantages of bimetallic thermometer Air draft Basic furnace wiring diagram Capillary tube restrictor Crystallization in vapour absorption system Hcfc 22 Humidification and dehumidification wiki Modified splash lubrication system Overload protector Strainer drier Thermostatic expansion valve Two stage vacuum pump Wikipedia Types of compressors
Copyright @ 2009 - 2022, "www.ref-wiki.com"