Greenway

 Speed Control added to ERV heat exchanger fans and a recirculation/bypass valve between the inlet and exhaust fan. Flower pots hot glue and tie wraps the corner stone of any ventilation system.  Its a throttle valve in a manifold between the inlet and exhaust fan plenums. Fan speed is set using the existing Wemos D1 R2 which can output 25Khz accurately to drive the PWM fan speed demand signal. Code changes to the ERV DAS and the ERV Controller and related Hubitat drivers, now renamed,  Ventilation Controller as it manages the boost fans for the zones. Drivers Some testing with no pipes connected showing the blockage effect of the heat exchanger core Exhaust fan only recirculate open 100%