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An HVAC system can only perform as well as the engineering calculations behind it. The load calculation establishes how much heat and moisture must be removed from a space. That result determines the required supply airflow. Airflow then drives duct dimensions, pressure losses, acoustic performance and fan selection.

Learn the essential steps for sizing a chilled water fan coil unit, including cooling load, airflow, chilled-water flow, external static pressure and final manufacturer selection.

Learn how to design a chilled water pump system—from calculating water flow and pipe pressure losses to determining pump head, selecting the correct pump and planning efficient controls. Avoid common design mistakes and discover practical Nexora tools that make HVAC calculations faster and easier.

Learn the fundamentals of HVAC design, from cooling-load calculations and system selection to airflow, duct sizing, equipment selection and commissioning. This practical beginner-friendly guide explains the complete design roadmap and introduces Nexora resources that help you strengthen your HVAC knowledge and calculation skills.

Learn how to design a chilled-water piping system step by step—from cooling-load and flow-rate calculations to pipe sizing, pressure-loss analysis, pump-head selection, valves, controls, insulation and commissioning. Includes practical equations, diagrams, tables and a complete worked example for HVAC and MEP engineers.

Learn HVAC duct design step by step: calculate airflow, size ducts, estimate pressure loss, identify the critical path and determine fan ESP with equations.