Manual D- Hand Calculations

This HERS Advanced Rater Training course provides an introduction to Manual D duct sizing principals, fundamentals and hand calculations. Sizing steps relevant to Manual D are covered and calculations for pressure drop to friction rate, pressure and air movement, return air and transfer grill sizing are discussed.


Upon completing this course:

  • Students will understand the steps to determine building load
  • Students will understand basic principals of residential duct sizing
  • Students will understand how to perform hand calculations used in the Manual D worksheet

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