we just moved my granddaughter4 and daughter 25 back in our house. they have black mold in the heater /air unit it was in the 4 year olds closet and bed, what are the symptoms of long black mold exposure. I think this has been a problem way before their 2 years of renting this place , and think the Land Lord just covered it up. My 4 year old grand daughter is coughing a lot, stuffy nose, congested and she s sleeping more than normal. He mom my daughter I coughing a lot and congested. I took them both to the local ER and all they said was upper repertory infection, just by looking at them no test were done