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Auto Defrost Dehumidifiers

Auto defrost dehumidifiers automatically clear coil frost in cool spaces. Compare defrost systems, operating temperature limits, moisture-removal capacity and pump options.

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Abatement Technologies AQUATRAP AT250RS LGR Dehumidifier – 266 PPD Saturation / 147 AHAM, 400 CFM, 115V

Abatement Technologies
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The Abatement Technologies AT250RS AquaTrap is a low-grain refrigerant (LGR) dehumidifier for water damage restoration — 266 pints per day at satur...

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Dapper Supply DP-CD1130 Commercial Dehumidifier – 290 PPD, Built-In Pump, 24,000 Sq Ft, ETL

Dapper Supply
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DP-CD1130 290-PPD Dehumidifier with 16.4-Foot Pump Lift for Large-Loss Drying The DP-CD1130 pulls up to 290 pints per day (145 PPD AHAM at 80°F/60...

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$10,813.00
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Ebac CD425 10141BR-US Refrigerant Dehumidifier 220V with Pump – 285 PPD, 1750 CFM

Ebac
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CD425 220V Industrial Dehumidifier with Onboard Pump The Ebac CD425 pulls 285 pints a day across spaces up to 52,972 cubic feet, putting it in the ...

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Dapper Supply DP-CD1129 Commercial Dehumidifier – 190 PPD, 700 CFM, 15,000 Sq Ft, R32

Dapper Supply
Out of stock

DP-CD1129 190-PPD LGR-Class Dehumidifier for Mid-Size Restoration The DP-CD1129 removes up to 190 PPD (94.5 PPD AHAM at 80°F/60% RH) and moves 700 ...

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$4,033.00
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Ebac Orion 10270GR-US Dehumidifier – 105 PPD, 115V, 2-Stage

Ebac
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Ebac Orion 11270GR-US Commercial Dehumidifier – 105 PPD, 2-Stage Air Cooling The Ebac Orion 11270GR-US is a high-output commercial dehumidifier rem...

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$2,680.00
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Ebac RM85H 10560RH-US Dehumidifier – 70 PPD, 115V, Smart Interface

Ebac
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Ebac RM85H 10560RH-US Dehumidifier – 70 PPD with Smartphone Monitoring The Ebac RM85H 10560RH-US matches the RM85's 70 PPD extraction capacity and ...

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Ebac CD425 10140BR-US Refrigerant Dehumidifier 220V – 285 PPD, 1750 CFM

Ebac
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Ebac CD425-D HVAC Dehumidifier – Model 10140BR-US (220V, 3-Phase, Gravity Drain) The Ebac CD425-D (10140BR-US) is the 220V, gravity-drain configura...

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Ebac HM150-H 11585RH-US Restoration Dehumidifier – 105 PPD, 110V, Onboard Humidistat

Ebac
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HM150-H Restoration Dehumidifier with Onboard Humidistat The Ebac HM150-H is the controlled version of the HM150 restoration unit, adding built-in ...

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Ebac HM150 11585RG-US Restoration Dehumidifier – 105 PPD, 110V, Rotomolded

Ebac
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HM150 Stackable Restoration Dehumidifier, 110V The Ebac HM150 is a rotomolded restoration dehumidifier that removes 105 pints a day at typical cond...

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Ebac CD220-D 11181GR-US Refrigerant Dehumidifier 220V – 157 PPD, 664 CFM

Ebac
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CD220-D Ducted Commercial Dehumidifier for Mid-Size Spaces The Ebac CD220-D removes 157 pints a day and holds humidity across roughly 21,000 cubic ...

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Dapper Supply DP-CD1131 Commercial Dehumidifier – 350 PPD, Built-In Pump, 30,000 Sq Ft, ETL

Dapper Supply
Out of stock

DP-CD1131 350-PPD Dehumidifier for Large-Loss and Industrial Drying The DP-CD1131 removes up to 350 PPD (176 PPD AHAM at 80°F/60% RH) and moves 750...

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Dapper Supply DP-CD1128 Commercial Dehumidifier – 105 PPD, Built-In Pump, 8,000 Sq Ft, ETL

Dapper Supply
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DP-CD1128 105-PPD Dehumidifier with Pump for Basement and Restoration Drying The DP-CD1128 pulls up to 105 PPD (52.5 PPD AHAM at 80°F/60% RH) acros...

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Ebac SPP6A Military Dehumidifier – 17 PPD, 115V, R134a

Ebac
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Ebac SPP6A Military-Grade Dehumidifier – 17 PPD, 147 CFM The Ebac SPP6A is a military-grade dehumidifier rated at 17 pints per day with 147 CFM air...

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Ebac RM85 10560RG-US Dehumidifier – 70 PPD, 115V, Rotomolded

Ebac
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Ebac RM85 10560RG-US Dehumidifier – 70 PPD, Integral Pump, Rotomolded Housing The Ebac RM85 10560RG-US removes 70 pints per day using a rotary comp...

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Ebac Kompact 10240KP-US Dehumidifier – 56 Pints/Day, Built-In Pump, 880W

Ebac
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11240KP-US Compact Dehumidifier — Water Damage Restoration with Built-In Condensate Pump The Ebac Kompact 11240KP-US removes 56 pints per day at AH...

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Ebac Triton 11393GR-US Dehumidifier – 52 PPD, 115V, Wheels

Ebac
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Ebac Triton 11393GR-US Dehumidifier – 52 PPD with Wheels and Hot-Gas Defrost The Ebac Triton 11393GR-US is a wheeled refrigerant dehumidifier rated...

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Ebac Neptune 10199GR-US Dehumidifier – 52 PPD, 115V, Portable

Ebac
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Ebac Neptune 10199GR-US Commercial Dehumidifier – 52 PPD, Hot-Gas Defrost The Ebac Neptune 10199GR-US is a compact refrigerant dehumidifier rated a...

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XPOWER BD-65 Viking Dehumidifier – 60 PPD AHAM, 1,300 Sq Ft, R32

XPOWER
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Stainless Steel Dehumidifier for Crawlspaces and Attics – 60 PPD AHAMThe XPOWER BD-65 Viking removes 60 pints per day at AHAM conditions (80°F, 60%...

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XPOWER BD-90P Viking Dehumidifier – 85 PPD AHAM, 2,600 Sq Ft, R32

XPOWER
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Commercial Grade Dehumidifier with Stainless Steel Housing for Crawlspaces & AtticsThe XPOWER BD-90P Viking removes 85 pints per day at AHAM co...

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Ebac CD425 10142BR-US Refrigerant Dehumidifier 460V – 285 PPD, 1750 CFM

Ebac
In stock

Ebac CD425-D HVAC Dehumidifier – Model 10142 BR-US (460V, 3-Phase, Gravity Drain) The Ebac CD425-D (10148BR-US) is the gravity-drain version of the...

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$11,400.00
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Ebac CD425 10149BR-US Refrigerant Dehumidifier 460V – 285 PPD, 1750 CFM

Ebac
In stock

Ebac CD425 HVAC Dehumidifier with Pump – Model 10143BR-US (460V, 3-Phase) The Ebac CD425 (10143BR-US) is a 285 PPD refrigerant HVAC dehumidifier ru...

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Auto Defrost Dehumidifiers

What Does Auto Defrost Do in a Cool Space?

Auto defrost dehumidifiers automatically clear ice from the refrigerant coil in cool basements, crawl spaces, garages and unheated job sites. Moisture can freeze on the cold coil when the surrounding air is cool. The system detects these conditions and clears the ice so drying can resume without you switching the unit off.

Frost can still form on a unit with automatic defrost. The system removes it, but the unit must stay within its stated operating temperature range. Choose a model rated for the coldest conditions your space will reach. Low-temperature limits vary by model.

For humidity targets, EPA guidance on mold and moisture advises keeping indoor humidity below 60 percent, ideally between 30 and 50 percent.

Which Defrost System and Temperature Limit Fit Your Space?

Hot-gas defrost sends warm refrigerant gas through the coil to clear ice. The Ebac RM85 uses thermostatically controlled hot-gas defrost and operates at 37°F without stopping the drying cycle. It has 70 PPD capacity, runs on 115V and has a rotomolded housing. The Ebac Kompact also uses hot-gas defrost. Its stated minimum is 33°F, with 56 PPD capacity and a built-in pump.

Reverse-cycle defrost reverses the refrigerant flow. The Ebac Orion uses this system and has a stated 33°F minimum. It is a two-stage, 105 PPD unit with 115V power and a built-in GFI plug.

The term "automatic defrost" does not tell you whether a unit uses hot-gas or reverse-cycle defrost. The Abatement Technologies AQUATRAP AT250RS is an LGR unit with sensor-controlled defrost and an operating range of 34°F to 100°F. Desiccant dehumidifiers have no refrigerant coil and do not need a defrost cycle.

When comparing auto defrost dehumidifiers, check each model's stated minimum temperature. A unit rated for 37°F does not have the same operating limit as one rated for 33°F.

Related: Garage Dehumidifiers · LGR Dehumidifiers · Dehumidifiers with Pump · Low-Temperature Desiccant Dehumidifiers

How Should You Match Capacity, Drainage and Power?

Once you have checked the temperature limit, compare moisture-removal ratings. The AQUATRAP AT250RS is rated at 147 PPD AHAM, moves 400 CFM and uses 115V power. Keep the AHAM designation in mind when comparing its rating with other listed capacities.

Check the drainage setup and available power, too. If you need a built-in pump, the Kompact includes one and lists 880W power consumption. These are freestanding units. Choose one with the capacity to handle the space's moisture load, and check that its electrical requirements and drainage arrangement suit your setup.

Frequently Asked Questions

What Does Auto Defrost Do on a Dehumidifier?
Auto defrost automatically clears ice from the cold refrigerant coil so drying can resume without you switching the unit off.
Does Automatic Defrost Mean Frost-Free?
No. Frost can still form on the coil in cool conditions. Automatic defrost removes it.
What Triggers the Defrost Cycle?
The system detects frost-forming conditions at the cold coil and activates defrost. Controls vary by model and include thermostatically controlled and sensor-controlled systems.
How Cold Can These Dehumidifiers Operate?
The Ebac Kompact and Ebac Orion have stated minimum operating temperatures of 33°F, while the Ebac RM85 operates at 37°F. The AQUATRAP AT250RS operates from 34°F to 100°F.

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