Video-led explanations of fan operation, selection, testing and system behavior for HVAC and equipment engineers.
EC fans are often sold as quieter, and at full speed the difference is...
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Modern EC fans report speed, current, temperature and faults. Used pro...
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One fan type now dominates air handling units. The combination of a ba...
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A defensible savings figure comes from a week of logged data and four ...
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Arrays are often sold as more efficient than a single large fan. On pu...
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A finished blower passes through roughly a dozen processes, and each o...
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A fan curve only means something when you know how it was produced. Th...
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Balancing is the last chance to catch upstream variation, and the corr...
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Follow a backward-curved wheel from flat steel to finished impeller. E...
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What the static-pressure margin on a fan curve measures, why 10–25% is...
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