ERV system: too much humidity
We built a custom 2095 sq ft home in the Raleigh North Carolina area and we moved in about a month ago. It’s an Energy Start rated home with a HERS Index rating of 54 and a blower test criteria 2 leakage rate of 1295 CFM 50. We have Mitsubishi mini split ductless HVAC system and have an ERV system. Our problem is the house is too humid. We are running the ERV system on the lowest fan speed because it is bringing in humidity and we can’t get the humidity to go below 50% except early in the morning. My wife is extremely sensitive to mold and can get very sick if she is exposed so we want to take all precautions to avoid mold in the home. We want to keep the humidity below 50% to have a mold free home. We purchased a stand alone home labs 70 pint capacity dehumidifier and we run it 24/7 and still can’t keep humidity below 50%. Currently it has been running between 48 in the early morning to the high 50’s and sometimes 60 in the afternoons. What can we do to lower the humidity? Can we install a dehumidifier that will work with the ERV system? What do you recommend? Thanks.