Calculate size, velocity, and pressure drop
™ lets users input airflow, velocity, or friction to determine size. Calculate pressure drop and flow rate. Input dimensions for custom shapes. Export results and save calculations.
Showing 1–20 of 1,000 ranked alternatives.
Wassim Murr
Size ducts by friction rate or velocity
Calculate sizes for rectangular and circular ducts by inputting maximum friction rate or velocity. Switch between calculation methods by tapping values. Convert between I-P and S-I units using a toggle switch. Export results for reference.
Greenheck Fan Corporation
Calculate fan laws and size ducts
Fan Law Calculator allows users to input rpm, cfm, static pressure, and horsepower. Modifying one value recalculates the others. Ductulator helps size HVAC ducts by inputting shape, dimensions, air temperature, elevation, and roughness.
Pheinex, LLC
Calculate size and performance
Calculate size for round or rectangular ductwork. Adjust airflow, diameter, width, or height using sliders. Enter values directly for precise measurements. Lock friction calculations for accurate results.
EFRAIN LOPEZ NUNEZ
Calculate duct size and pressure drop
Calculate duct diameter based on airflow velocity. Perform CFD analysis for fluid dynamics. Estimate pressure drop across duct systems. Generate reports with detailed calculations. Export results for documentation.
S&P SISTEMAS DE VENTILACION SL.
Calculate diameter and ventilation parameters
Calculate dimensions by converting circular to rectangular equivalents. Determine ventilation parameters including diameter, airspeed, airflow, and dynamic pressure. Compute pressure drop for straight sections and systems.
Syska Hennessy Group, Inc.
Calculate ducts, verify designs, track results
Perform duct design calculations for rectangular, round, and flat oval shapes. Input dimensions and system parameters for accurate sizing. Verify calculations in real-time during field work. Sync with ASHRAE standards for reliable results.
Carmel Software Corporation
HVAC duct sizing analysis application tool
The app sizes HVAC duct runs or a range of duct sizes using the constant friction method. Users can input airflow, dimensions, or a range of sizes to calculate results in English or Metric units.
Tan Chia Ling
Calculate airflow rate instantly
Calculate airflow displacement by inputting velocity or volume. Select duct type and dimensions with unit options. Instantly display results in preferred units including fl/min, m/s, and ft3/min.
Steven Ramsay
Calculate air flow and duct sizes
Calculates air volume, pressure loss, velocity, and duct size for rectangular or round ducts. Supports both imperial and metric units. Users input values to determine required dimensions and system performance.
Copeland LP
Calculate refrigerant charges instantly
Calculate refrigerant charges for systems using built-in formulas. Input system parameters to determine correct levels for R-22, R-410A, R-32, and other refrigerants. Save and export calculation results for record-keeping.
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