The HRV's 湿度调节 is to tell the HRV to run max when the inside 湿度 is higher than the setting. Normal setting is 40%.
The HRV will regulate the 湿度 to the setting only if the outside 湿度 is lower than your house by ventilation.
Since I want fresh air, I have just ignored the setting and set the fan speed at #1 permanent on all year round except for extreme hot humid days.
