The Duct Sizing Calculator is a hand held sliding calculator used for sizing supply and return duct systems using the equal friction, or velocity reduction design method. Front of calculator includes scales for friction, velocity, round duct size, weight per linear foot of round duct, surface area in square feet per lineal foot of round duct, rectangular equivalents of round duct sizes, weight per linear foot of rectangular duct and surface area in square feet per linear foot of Rectangular duct. Back of calculator has equivalent feet of straight duct for commonly used fittings, corrected pressure drop chart, and many HVAC formulas.Pull out slide has recommended duct velocities, recommended gauges for sheet metal, and much more. The photo shows both sides of the tool.
This slide is made of thick durable water resistant paper stock with glued edges and corner rivets. Tool measures 4 inches high and 8.5 inches wide.
The item "Air Duct Sizing Calculator Slide Rule Chart" is in sale since Monday, November 14, 2011. This item is in the category "Home & Garden\Home Improvement\Heating, Cooling & Air\Air Conditioners & Heaters\HVAC Parts & Accessories". The seller is "theheatcoolstore" and is located in Midwest. This item can be shipped to United States, all countries in Europe, Canada.