I have a mold problem in my apartment, in certain areas there is condensation.
I believe I have traced this to the air conditioning, in the apartment the humidity will vary from 60% to 85% RH at a temperature of 23.5 degrees Celsius.
Outside it is very hot, around 37 degrees Celsius with high humidity.
We have two fan coil units (one for the living room, the other shared between 2 bedrooms) both fed of a central chilled water system. We are on the 10th floor of a 15 story apartment block.
Both AC outlet vents put out humid air, one of them is worse than the other. The air is cold at the required temperature, but it feels wet - 90% RH at 23 degrees Celsius.
We have no leaky windows, no vents that are sucking in outside humid air - only outlet vents for the kitchen and bathroom extractor fans. We leave the AC running 24/7 at set temperature of 23.5 degrees.
Landlord said there is no problem and doesn't want to fix it - he sent his AC guys twice who just cleaned the filters nothing else.
It is very hard to find professional tradesmen here in this part of the world where there is an illogical infatuation with low cost labor - most "engineers" are self trained air conditioning experts.
Since I don't accept their answer that me mopping the floor is causing the humidity (i don't own a mop), how would i go about fixing this:
- Any idea what the cause is of cold but damp air (90% RH at 23 degrees Celsius)? Are there multiple possible causes?
- Can i service the AC drain, filter and anything else that may be causing a block myself?
- Is this likely a problem with the building or confined to my fan coil units? I am concerned about health issues so don't want to be troubleshooting this for long.