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.
Showing 1–20 of 1,000 ranked alternatives.
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.
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.
Air Conditioning Contractors of America
HVAC duct sizing the easy way.
The app provides HVAC duct sizing using ACCA's Manual D, the ANSI standard for residential duct design. It offers features like zooming, locking the wheel, and taking snapshots for reference.
Cyberprodigy LLC
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.
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.
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.
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.
Alan Cave
HVAC duct sizing for professionals.
The app calculates duct sizes for HVAC design professionals. It provides a list of even sized ducts that meet design criteria, allowing users to review options at various aspect ratios.
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.
Gastite Products LLC
Calculate Thermaflex duct size easily.
The app calculates the smallest Thermaflex duct size for HVAC installations. Users input project volume and friction loss to determine system velocity and the appropriate duct size.
Trond Rossvoll
HVAC calculations for building energy use.
The app performs HVAC calculations for building energy use. It helps users calculate SFP, temperature efficiency, air velocity, duct dimensions, and pressure drop.
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.
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