Modern ERV systems with EC (electronically commutated) motors allow independent variable control of incoming and outgoing fan speeds, enabling unbalanced ventilation strategies where supply and exhaust CFM can be set to different values within a single unit.
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Speaker
Unidentified Speaker — Home Pressure Effects of Unbalanced ERV, Ventilating Dehumi… [7nhXP3v5Zy0]Evidence Quote
“now we have access to what's called EC motors which are just means that they're infinitely variable you can actually turn a knob and it'll slow the fan down or speed the fan up [2:05]”
Source
Home Pressure Effects of Unbalanced ERV, Ventilating Dehumidifier, or Supply-Only Ventilation— Home PerformanceCreated: 8/13/2026, 3:25:18 AM
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