Fan Law Calculator vs EcoMeter Pro

The Fan Law Calculator App has been designed to allow quick estimation of the performance impact of variation in airflow and/or rpm on an existing system. The standard fan law equations are used to estimate the system performance changes. Input the current values for airflow, rpm, pressure and current (or power) into the appropriate text field. The calculations will automatically update as you type. The updated values can be input in one of two ways. The new values can be entered into the appropriate text field. Or, you can drag the airflow value left and right on the graph view to change the values. The calculations will automatically update as you edit the values. Calculations The standard fan law equations are applied: cfm2 = cfm1 * rpm2/rpm1 sp2 = sp1 * (cfm2/cfm1)^2 power2 = power1 * (cfm2/cfm1)^3 Notes: This application (App) is provided for use by qualified HVAC engineers and designers in the design of air handling systems and is not a substitute for appropriate design services. When in doubt, contact a design

EcoMeter Pro is an HVAC airflow balancing and reporting tool designed to help field technicians produce accurate, professional results with speed and consistency. Built around real-world field workflows, EcoMeter Pro guides technicians through proportional balancing, supports single-system documentation, and generates clean, professional PDF reports suitable for residential and light commercial applications. Key features include: - ProPortional airflow balancing workflow - Standalone single-system balance reports (PDF) - Outlet-level balancing summaries with tolerance tracking - Fast, repeatable field calculations - Customizable reports with company branding EcoMeter Pro is designed for HVAC technicians, installers, and startup commissioning teams looking to improve accuracy, consistency, and professionalism in the field. Additional workflows, including expanded system and hydronic tools, are planned for future updates.