Wendes HVAC Estimating Blog

Successful Estimating Principles

Posted by joseph damelio on Tue, Oct 8, 2013

Estimating Basics



We are covering some of the basic estimating principles detailed in a manual written by Herb Wendes, " Everything You Wanted To Know About Estimating But Were Afraid To Ask." The updated and expanded version of the original manual is now published by Fairmont Press, Inc. "Mechanical Estimating Manual".

Successful contracting is built on a foundation of accurate labor and material estimates with valid markups for overhead and profit. Bids should include direct costs for labor, materials, equipment, subcontractors, indirect overhead costs as well as a provision for profit. The primary goal of the estimate is to cover all costs for a project as they are likely to to occur and meet acceptable plan, specifications and performance criteria. Allowances for indirect overhead costs for the year should be allocated on a proportionate basis for each project. Allocation of indirect costs are easily overlooked when considering the multitude of direct labor, material costs, special conditions and specifications for a project. 

As much as possible allow enough time to properly prepare the estimate, most errors are experienced due to rushing, pressures of unforseen interruptions, omissions,inaccurate takeoffs and not having adequate time to clarify plan and specification errors. In many cases a contractor is forced to bid selectively in order to avoid mistakes. In the long run it is better to select projects that have the potential for profit and provide value to the client.

The introduction of specialized HVAC Estimating Software has provided estimators with a valuable tool in preparing accurate and detailed estimates. Software Advice has released a recent survey that considers and evaluates some of these benefits. The link below will lead you to the survey. 



Topics: Choosing the Best HVAC Estimating Software, HVAC Etimating Software, Accurate HVAC Sheet Metal Labor Software

BIM and HVAC Estimating Software

Posted by joseph damelio on Tue, Oct 4, 2011

BIM and HVAC Estimating SoftwareBIM -Building Information Modeling Is a computer aided process for developing building data during the construction design and building life cycle. BIM software contains elements of a building design as individual objects that include the geometry and attributes in the building design. BIM software design tools provide the ability to extract many different views of an object in a building model that may be relevant for other uses in the drawing process or downstream construction process.

 BIM software deploys three dimensional real time modeling software tools to increase productivity in building design and construction.Most BIM software includes detailed  attributes of the building geometry,spatial relationships of objects, object quantities, object properties and building components which eliminate uncertainty about detailed elements of the building design during the construction phase.

BIM software provides a "parametric definition" which describes each object and relationship of each object to other objects, as one object is changed other objects will change as well. The connectivity of objects insures that the integrity of the building design is not corrupted as changes are made.

To learn more about BIM and MEP Software contact Autodesk, a leading provider of software in this field. Wendes Systems is working closely with BIM software providers to intigrate HVAC Sheet and Mechanical estimating with BIM and MEP software in order to produce better results.      



Topics: BIM Software and HVAC Estimating Software, Accurate HVAC Sheet Metal Labor Software