High Volume Low Pressure is an application technique responding to legislation in California, designed to reduce photochemical smog produced by atmospheric pollutants.

The legislation requires a transfer efficiency of 65% minimum. Typical conventional spray techniques are around 25-40% efficient. Electrostatic applications of conventional paint can achieve the 65% efficiency and electrostatic powder coatings 100% transfer efficiency, but the equipment is expensive and not very flexible. H.V.L.P. basically consumes a greater volume of air 12-25 c.f.m. (Cubic Feet per Min) at (5-10 psi) at a low pressure. This low pressure reducing bounce back and overspray dust, but unable to atomize as well as conventional.