I had a fresh air exchanger and an Aprilaire humidifier on the furnace. The humidity never went above 30% when it was first installed, but I thought it might have been because it was October and the furnace rarely went on at the time. Now the humidity still has not gone above 30%. (I live in the Kansas City area.) I am wondering if the fresh air from outside and continuously changing the air is making the humidifier less effective.
Randy R