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  1. HVAC Ductwork Sizing (with Calculator): How to Size Air Ducts …

    Jun 3, 2025 · Our Ductwork Calculator, which some call a ductulator, gives accurate results for duct sizing diameter when the right information is plugged into it.

  2. Online Ductulator - HVAC Duct Calculator

    Free online ductulator calculator for HVAC duct sizing, velocity, friction loss, and round to rectangular duct equivalency calculations.

  3. Ductulator

    Free online ductulator for sizing of HVAC ducts.

  4. HVAC Duct Calculator | Duct Size Calculator - ServiceTitan

    Save time on the job and do less manual math by using our free, online ServiceTitan Ductulator to easily calculate the right size duct for your projects. Below we walk through the various …

  5. Free HVAC Duct Sizing Calculator

    Nov 4, 2025 · Accurate HVAC duct sizing calculator for airflow, velocity, and pressure drop. Optimize duct dimensions for efficient heating and cooling systems.

  6. Duct Size Calculator - adicot.com

    This digital duct size calculator provides estimates equivalent to traditional Ductulator tools, offering convenient online duct sizing for HVAC professionals and contractors.

  7. HVAC Duct Calculator - fieldservicehq.com

    Our comprehensive HVAC duct calculator supports both imperial and metric units, helping contractors and homeowners worldwide determine optimal duct sizes, calculate airflow rates, …

  8. Duct Calculator (HVAC Ductwork Sizing & Cost Estimation)

    Apr 6, 2025 · Easily calculate HVAC duct size and estimate installation cost based on airflow requirements and duct dimensions. Proper ductwork design is crucial for efficient HVAC …

  9. Duct Work Calculator - Glow Calculator

    Easily calculate ductwork surface area, volume, insulation perimeter, and material costs with our free Duct Work Calculator tool.

  10. Duct Calculator - Jobber

    Use our free HVAC duct calculator to determine the right duct size and estimate airflow volume based on duct type, velocity, length, and number of bends. Get accurate measurements you …

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