Senin, 03 Maret 2008

HVAC Drawings - the Final Products of Your Know-How, Brainstorming and Hours of Work

by Andy Grimm

HVAC drawings explain the design of each component of an HVAC system. Thus you might have a drawing for "constant volume air terminal unit with reheat control diagram". There would be many such detail drawings that go to document the total HVAC system.

The drawings are easy to "draw" with a software tool like AutoCAD. However, the "drawing" part is only the culmination of a lot of things. It comes after you have analyzed the HVAC requirements of a building. The requirements analysis in turn needs HVAC know-how that you have acquired over several years.

The analysis is followed by considerable brainstorming and working with the design software to develop a design that would fulfill pre-determined requirements. Then follows hours of working to strike a balance between conflicting requirements, e.g., trading off performance for a lower cost, and developing specifications that would deliver acceptable performance. The HVAC drawings are based on these specifications.

Thus the HVAC drawings are only the culmination of a design process that requires a great deal of time. You would already be familiar with all these things if you were an HVAC designer.

You will be able to save several to many hours of the design time if you use readymade HVAC details obtained from a reputable source. You would typically be able to edit the details, if necessary, and incorporate them into your design.

What kinds of readymade HVAC drawings can you expect to get? It depends on the source. One particular supplier promises over 300 details, including such details as "Control of smoke damp at smoke partition with duct mounted smoke detection", "VAV air terminal unit with reheat control", "Packaged air- cooled water chiller controls" and so on.

You can create a library of HVAC drawings on your own, starting with the details purchased from sellers as mentioned above. Instead of starting from scratch every time, you can use these details to speed up your deliveries. Your customers would be more than pleased with such unexpectedly speedy deliveries.

HVAC drawings are thus the result of many hours of work, either your own or somebody else's. They are useful only if they work successfully as an integral part of a proven HVAC system. Unsupported by detailed design effort, HVAC drawings are not likely to serve any purpose.

As someone said, even God, the repository of Love, cannot love the most beautiful of drawings, of the wrong machine. If your HVAC drawings were not part of a working or workable HVAC system, it would indeed fall under this unlovable category.

About the Author

Andy Grimm from CAD Ground Outsourcing Solution writes about HVAC CAD and AutoCAD Details - visit www.cadlibrary.com for further information.

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