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This lecture is an explanation of how to limit the quantities of ducts, fittings, and external and internal insulation. It is part of the HVAC course with Omniplan presented by Engineer Dhafer Askalan. We also provide a service to test your level of knowledge through the following free exam http://bit.ly/36va4an. All applicants for the exam will be contacted and the evaluation will be sent to the e-mail, which helps the student know the extent of his need for this course. You can view the course details through the following link https://www.omniplan.me/omni-courses/... To contact 0795150607 065163040