Total pressure<\/strong> is the full energy of the moving air; static pressure<\/strong> is the usable pushing force after velocity energy is set aside. Fans are classed by the static pressure they can develop against a system – and the recovery core is one of the biggest resistances in that system.<\/p>\n El Ca\u00edda de presi\u00f3n<\/a> across a recovery core (driven by Velocidad frontal<\/a>) must be overcome by the supply and exhaust fans. A higher-effectiveness, smaller core raises pressure drop and pushes the fan into a higher static-pressure class – more motor power and more noise. Selection balances recovery gain against fan penalty.<\/p>\n EC (electronically commutated) fans hold efficiency at part load, so a recovery system with variable flow keeps its fan energy low even when the core drop is significant. In a retrofit<\/a> or AHU upgrade, pairing recovery with EC fans captures both the heat saving and the fan saving.<\/p>\n Is static pressure the same as pressure drop?<\/strong> The core pressure drop is the static pressure the fan must supply across that component; total system loss is the sum of all components.<\/p>\n Does a bigger core avoid the fan penalty?<\/strong> Yes, at the cost of size and material; the optimum is found by lifecycle cost, not by minimising either alone.<\/p>\n Need help specifying the right air-to-air heat recovery for your project? Contact the QIYU engineering team<\/a> – WhatsApp +86 157 5335 5505, or email kuns913@gmail.com.<\/p>\n Preguntas frecuentes<\/strong><\/p>\n It groups fans by the static pressure they can deliver, such as low, medium or high pressure, which must match the duct and exchanger pressure drop.<\/p>\n<\/div>\n Undersized static pressure starves airflow and cuts effectiveness; oversized wastes fan power, so the fan curve must clear the core's operating pressure drop at design flow.<\/p>\n<\/div>\nCore pressure drop sets the fan<\/h2>\n
Why EC fans change the equation<\/h2>\n
Frequently asked questions<\/h2>\n
What is fan static pressure class?<\/h3>\n
Why must the fan match the recovery core?<\/h3>\n