Cooling the air by definition raises the humidity :-)
Dehumidifier mode in AC works by cooling the air below the dew point, removing the condensation, then warming the air up (either by itself or literally heating it up)
Dehumidifier mode in AC works by cooling the air below the dew point, removing the condensation, then warming the air up (either by itself or literally heating it up)
Due point for that air is 19.8C. Meaning it reaches 100% relative humidity at this point. If cooled even more, water condensates from air into droplets.
—
What this means: if you cool that air to 22 degrees (instead of 19.8) it will reach 87% humidity without loosing any water to the outside.
—
That’s why we need humidifiers in winter as the opposite thing happens: if we heat cold air that has 80% relative humidity to room temperature it will drop its humidity to 20%
The real problem is the repair costs of these advanced units in the developed countries. Carrier wanted $8k for a new control board for a residential unit in the US. Same thing for ECM/VFD.
Same water tray and a hose for water condensate.
That’s a bit too nitpick-y. It raises the relative humidity by the condenser coil unit so it condenses and drips out, but air flowing back into the rooms will have less humidity.