💧 Inputs

📊 All Humidity Measures

Humidity Ratio (gr/lb)
Humidity Ratio (lb/lb)
Humidity Ratio (g/kg)
Relative Humidity (%)
Dew Point (°F)
Specific Humidity (lb/lb)
Partial Pressure H₂O (kPa)
Comfort Zone

📚 Reference Conditions

ConditionDB (°F)RH (%)W (gr/lb)
ASHRAE comfort — summer7550~65
ASHRAE comfort — winter7030~32
Cooling coil leaving air5590–95~55–60
Hot humid outdoor (Miami)91~74~163
Hot dry outdoor (Phoenix)108~13~60
Cold outdoor (Minneapolis)-16~80~3
Free 14-Day Trial  ·  No Credit Card

Do the full calculation in AIM Works

This calculator handles one step. AIM Works runs the complete MEP design workflow — thermal load calculations, duct & pipe networks, equipment selection, code compliance, and an AI design assistant — in one tool.

  • ✓  ASHRAE 62.1 ventilation + CLTD/CLF/RTS load methods
  • ✓  Darcy-Weisbach pipe & duct network solvers
  • ✓  ASHRAE 90.1 / IMC / NFPA compliance checks
  • ✓  20 free AI design messages included in trial
Try It Free for 14 Days →
No credit card  ·  Cancel anytime
See plans & pricing →