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HVAC Design Fundamentals

Design is the chain that explains why the equipment and ductwork are the sizes they are. This path starts with air and moisture, builds the heating and cooling load, selects equipment against that load, and spends the blower's pressure carefully across the distribution system.

9 steps

Understand the air

  1. 1Airflow Fundamentals
  2. 2Static Pressure
  3. 3Psychrometrics
  4. 4Duct Design Basics

Calculate, select, and distribute

  1. 5Why Load Calculations Exist
  2. 6Manual J: Calculating the Load
  3. 7Manual S: Selecting the Equipment
  4. 8Manual D: Sizing the Ducts
  5. 9What Oversizing Actually Costs