Formula & worked example
ṁwater=ṁdry-air·(Win−Wout); Qlatent=ṁwater·hfg.
5,000 CFM at 1.2 kg/m³ with humidity ratio falling from 0.012 to 0.008 removes about 40.8 kg/h of water.
HVAC design calculator · Updated Sep 17, 2026
Cooling Coil Condensate Calculator — Humidity Ratio, Water Removal & Latent Load
Estimate cooling-coil condensate from dry-air flow and entering/leaving humidity ratio, with kg/h, L/h, US gal/h and equivalent latent cooling load.
Inputs
Live result
Dry-air mass flow 2.8316847 kg/s
Moisture removed 40.77626 kg/h
Condensate ≈ 40.77626 L/h (10.771948 US gal/h)
Equivalent latent load 27.75051 kW (94,688.671 BTU/h)
Assumptions & limits
- Humidity ratios are kg water/kg dry air.
- Actual drain flow can differ during cycling, re-evaporation and transient operation.
Frequently asked questions
What does this Cooling Coil Condensate Calculator calculate?
Estimate cooling-coil condensate from dry-air flow and entering/leaving humidity ratio, with kg/h, L/h, US gal/h and equivalent latent cooling load.
Can I use the result for final HVAC selection?
Use the result as a transparent engineering cross-check. Confirm final selections against measured design conditions, manufacturer data, applicable standards and local code.
Why are the assumptions shown?
HVAC shortcuts can look precise while hiding density, efficiency, free-area or pressure assumptions. MAXScanner keeps the governing inputs visible so the result can be audited.