HVAC
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VAV Box Sizing and Selection: Airflow, Inlet Size and Minimum Flow Explained
How to size and select a VAV box step by step, from zone airflow and minimum flow to inlet size,…
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Expansion Tank Sizing for Chilled Water Systems: Formula and Worked Example
How to size a diaphragm expansion tank for a closed chilled water system, with fill and maximum pressures, the ASHRAE…
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Chilled Water Pump Head Calculation: Step-by-Step Guide with Worked Example
How to calculate chilled water pump head for closed-loop systems step by step, with typical pressure drops and a full…
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External Static Pressure (ESP) Calculation for AHU and FCU: Step-by-Step Guide
External static pressure (ESP) is the number you put on every AHU and FCU schedule, and getting it wrong shows…
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HVAC Standard Details: FCU, AHU, Pumps, Chillers & Fans (Free DWG)
Every HVAC project, from a small commercial building to a university campus, lives or dies by its HVAC standard details.…
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