HVAC Pressure Requirement

 
By 6 January 2016
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The diffuser or grille minimum pressure for a given air volume reflects itself in ultimate system fan horsepower requirements.

A diffuser or grille with a lower pressure rating requires less total energy than a unit with a higher pressure rating for a given air volume and effective area. Diffusers and grilles of a given size having lower pressure ratings usually have a lower sound level rating at a specified air volume.