Small-duct, high-velocity air-conditioning systems create a blending effect of high- and low-pressure air. This allows a temperature differential of not more than two degrees within the space. That and
2010-2011 PHCC President Frank Maddalon (Photo courtesy of F.R. Maddalon Plumbing & Heating) The Plumbing-Heating-Cooling Contractors-National Association will install Frank Maddalon, owner and founder of F.R. Maddalon Plumbing & Heating,