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Home / Calculators / AHU Coil Condensate Drainage Sizer
Airflow & Psychrometrics โœ“ ISO/ASHRAE Thermodynamic Math โ€ข Calibrated for 42ยฐC Tropical Ambient

AHU Coil Condensate Drainage Sizer

Calculate evaporator coil moisture condensation rates and P-trap depth to avoid water stagnation and overflow in AHU rooms.

โšก Live Interactive Computation Engine โœ“ Real-Time Field Calibrated
Coil Condensate Water Drainage
7.8 Liters / Hour
2.06 Gallons / hr (49.4 L/day continuous)
Recommended: 1" PVC Drain line with deep P-trap to prevent condensate pan overflow.
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Governing Formula:
Condensate Rate (GPH) = 0.0006 ร— CFM ร— (W_entering - W_leaving in grains/lb); Trap Depth = Fan Static Pressure + 1 inch
Pune Field Notes & Environmental Standards:

Essential for monsoon humidity design in Pune to prevent AHU drain pan overflow and indoor microbial growth.

Technical Engineering Guide & Field Diagnostic Practices

During Pune’s monsoon season, cooling coils extract massive quantities of water vapor from fresh air streams. Proper drain line sizing and P-trap design prevent condensate backflow into supply air ducts.

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