Manual D provides:
-A single set of ANSI-recognized duct sizing principles and calculations that apply to all duct materials
-System operating point (supply Cfm and external static pressure), and airway sizing for single-speed and multi-speed (ECM) blowers
-A method for determining the impact of duct friction and fitting pressure drop on blower performance and air delivery
-The most comprehensive equivalent length data ever published.
This manual is perfect to get all the information needed to pass the trade exam! It doesn't even miss a step which i absolutely love.talia perez
All the books I purchased from Contractor Campus were in perfect condition. What I love about this company was the label tabs for all my books. Those definitely helped me out during the exam finding answers a lot quicker.
Robbie Lawler