Desiccant vs Refrigerant Dehumidifier: Which One Do You Need?

Dehumidifiers come in two main technologies, and choosing the right one can make or break a drying job. Refrigerant and desiccant units both remove moisture from air, but they work differently and shine in different conditions. Here is how to decide.

How Refrigerant Dehumidifiers Work

A refrigerant dehumidifier passes air over cold coils, where moisture condenses and drains away. They are efficient and effective in typical indoor conditions, which makes them the everyday workhorse for most water damage and facility drying.

• Strengths: efficient in normal temperatures and humidity, lower running cost
• Tradeoffs: performance drops in cold conditions and at very low humidity

How Desiccant Dehumidifiers Work

A desiccant dehumidifier uses a moisture absorbing material to pull water out of the air, with no cold coils to frost up. This lets them reach very low humidity and keep working in cold spaces where refrigerant units falter.

• Strengths: works in cold conditions, reaches very low humidity, great for specialty drying
• Tradeoffs: often uses more energy, can raise the air temperature

Choosing for the Conditions

1. Typical indoor water damage at normal temperatures: refrigerant
2. Cold spaces like winter losses, crawl spaces and unheated areas: desiccant
3. Specialty drying of hardwood, plaster and concrete that needs very low humidity: desiccant
4. Everyday facility humidity control: refrigerant

Why Restorers Carry Both

Professional restoration companies often own both types, because the right choice depends on the job. A refrigerant unit handles most losses, and a desiccant comes out for cold conditions and Class 4 specialty drying. Matching the technology to the conditions is what gets materials to dry standard on time.

Size It Correctly Too

Whichever type you choose, capacity matters. Match the unit's water removal rating to the size and wetness of the space. Browse our full range of dehumidifiers, including refrigerant and desiccant models, to match the job.