Software allows input of data from instrument readings and gives solution to the problem. Definition and help section provides additional information about concepts and functions. ...
http://www.ac-pal.com/index.html
Interactive manual includes basic troubleshooting and maintenance tips for do-it-yourselfers. Feedback form provided for technical questions.
http://www.accheckup.com/
Input a desired flow rate in CFM, a limiting velocity in FPM, air temperature in degrees F, the length of the duct, and the duct material. The program calculates the duct cross sec...
http://www.connel.com/freeware/airduct.shtml
Volunteer mechanics answer questions via e-mail. Volunteers can be evaluated based on credentials and user ratings.
http://www.allexperts.com/getExpert.asp?Category=696
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