Engineering Tools
Free online HVAC engineering calculators. Try before you buy - these tools demonstrate the calculation methodology used in our full software suite.
Duct Sizer
Size round, rectangular, and oval ductwork using ASHRAE equal friction or velocity methods.
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Pipe Sizer
Size piping using Hazen-Williams or Darcy-Weisbach methods with multiple materials.
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Psychrometric Chart
Interactive ASHRAE psychrometric calculator with visual chart and full state calculations.
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