HVAC Accurate Duct Estimating With Wendes Systems Inc.
Since 1980 Wendes Systems, Inc.has proven to be the leading choice by estimators with per piece Duct Estimating Accuracy. The Wendes estimating data introduced with the Wendes Mechanical Estimating Manual in 1978 continues to be circulated today and is available for download at no cost. The Manual outlines formulas for manually calculating per piece duct fittings and straight duct labor cost. The estimating labor cost methodology starts with a step by step process for preparing
