If your air conditioner s capacity is much larger than needed it won t be able to remove moisture as effectively.
Humidity air conditioned room.
An air conditioner that s only capable of running at one speed basically on or off can have the same problems as one that s too large when it comes to hvac humidity control.
If you are in the market for an air conditioner and live in a high humidity area getting an air conditioner with a built in dehumidifier can be the easiest way to address the issue.
Many systems are set up to move air at a rate faster than that.
By using a dehumidifier you free up the air conditioner to focus on its primary job cooling your home.
The rh range of 50 60 percent is fairly reasonable but at 60 rh there is a risk of some fungi gaining foothold and drawing the moisture t.
This is because more powerful air conditioners don t need to run as much so they don t get a chance to remove as much moisture from the air.
The water will gradually evaporate into the air.
When it comes to air conditioners efficiency is far better than size.
For example a window unit that s designed for a small room such as a home office will not function properly in a large master bedroom or great room.
In turn your home s humidity levels will remain high.
Your air conditioner will be effective at controlling humidity only if it is correctly sized for the amount of work it needs to do.
Best type of air conditioner for high humidity areas.
The best tools to keeping relative humidity at ideal levels in your home year round are whole home humidifiers and dehumidifiers these systems automatically work with your home s heating and cooling systems to add or remove moisture from the air.
High humidity is often the cause of issues as it forces your air conditioner to work harder in order to keep up.
Air conditioners help to improve indoor air quality but they can also remove moisture in the air causing various concerns.
When the unit can only run at one speed it turns on and runs full blast until the air reaches set temperature.
For faster evaporation use large shallow bowls and place them in direct sunlight where they ll warm up quickly such as a window sill.
In hot humid climates like ours you want your air conditioner to move air at a rate at or near 350 cfm per ton.
For humidity removal a faster rate is not ideal.
The other three responses so far cover your question fairly well but i take exception to a few points.
An easy way to improve the humidity in an air conditioned room is to place a few bowls of water around the room.
Having a larger air conditioner unit will not necessarily provide the temperatures you want and a smaller more efficient unit can typically do the trick if it is.
An air conditioner can reduce humidity significantly making a room dry.