I am designing and estimating for a light commercial HVAC contractor and this book gives me what I need to estimate and bid projects. This reference book gives the background about where the estimating numbers come from - which is good. The Correction Factors" tables (among others) are easy to find and easily understood. For someone doing ductwork estimates by hand, and are working to be accurate will have the info they need in this book. My etimates have been competitive - so I am trusting the book more all the time.
Read More Reviews on Mechanical Estimating Manual: Sheet Metal, Piping and Plumbing...
