What Kind of Dehumidifier Can Be Used with an AC Unit?

Generally speaking, except for a few mountaintops in Indonesia, northern Vietnam, and Burma, all of Southeast Asia is pretty warm, swinging between 25 and 35 degrees from cool to hot season throughout the year. Humidity is high, year round. As a result, the houses in Southeast Asia need a complete dehumidification and cooling system.

 

Three Main Types of Dehumidifiers for AC Systems

1. Standalone Portable Dehumidifier

A standalone portable dehumidifier is a separate machine you place in the same room where the AC is running.

If you need targeted dehumidification (bedrooms, living rooms) without modifying your AC, you can use the portable dehumidifier directly.

Portable dehumidifiers are good for apartments, rental units, and specific problem rooms.

The AC cools the room, and the portable dehumidifier manages the moisture.

Preair is a dehumidifier supplier that provides various portable dehumidifiers, for example, HT dehumidifiers. The series of dehumidifiers can work in the environment with a temperature range of 5°C-38°C and a humidity range of 10%-95% RH. This type of dehumidifier has a large water tank to collect water, or users can choose the direct drain by connecting with a drain hose.

 

2. Whole-House Dehumidifier (Connected to Central AC)

A whole house dehumidifier is a large dehumidifier installed in the ductwork of a central AC system.

If you have central air conditioning (like in big houses or offices), you can control humidity and temperature at the same time.

Whole house dehumidifiers are good for large properties needing consistent humidity control across many rooms.

There is one thing that users must know, which is that the whole house dehumidifier needs to be installed professionally. It dehumidifies the air before or after cooling.

Preair has two series of whole house dehumidifiers for sale, HD and WH dehumidifiers. These units can work in the environment with a temperature range of 5℃-35℃ and a humidity range of 10%-90%RH. They can be installed in your basements, attics, and crawl spaces. Support with remote control, the dehumidifier can be connected to the HVAC system and controlled by a third-party controller.

 

3. AC Units with Built-in Dehumidifier Mode (Dry Mode)

What it is: Many modern split-system ACs have a "dry mode" or "dehumidify mode" setting.

When to use: If your goal is moderate humidity control without buying extra equipment.

Good for: Everyday residential use in humid seasons.

Dry mode slows the fan and compressor to pull moisture out without cooling aggressively.

 

Simple Guide of Controlling Humidity

Situation:	Best Dehumidifier Option:
Small room, rented space	Portable standalone dehumidifier
Big home, ducted AC system	Whole-house dehumidifier
Just want simple control	Use AC's dry mode