Why Quest Dehumidifiers

Quest Climate Logo

Quest dehumidifiers are engineered for agriculture — delivering industry-leading efficiency, sustainable refrigerants, and patented M-CoRR™ technology to maintain ideal VPD, reduce heat load, and protect crop quality.

Precision Humidity Control for Modern Grow Environments

  • Designed for commercial cultivation & indoor agriculture
  • Industry-leading energy efficiency
  • Built in the USA with 5-year warranty
  • Sustainable R454B refrigerant
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M-CoRR™ Multi-Coil Technology

Quest’s patented multi-coil refrigeration design improves efficiency by recycling energy during dehumidification, boosting performance while reducing heat output in grow rooms.

Why Should Growers Care?

Less heat added to the room = lower HVAC costs

Faster recovery and fewer defrost cycles

More consistent VPD control

M-CoRR technology allows units to maintain performance even in cooler conditions while staying more compact than traditional dehumidifiers.

R454B Refrigerant — The Future of Climate Control

Quest has transitioned its lineup to environmentally friendly R454B refrigerant to meet future regulations and improve sustainability.

Environmentally Responsible Refrigerant

Sustainability comes built-in. The second-generation Quest Dehumidifiers utilize R454B refrigerant, a more environmentally responsible choice than R410A and R32, with a significantly lower global warming potential—delivering powerful dehumidification with a smaller environmental footprint.

  • Lower environmental impact
  • Regulation-ready equipment
  • Improved efficiency + modern compliance

Overhead Dehumidifiers for Large Cultivation Rooms

Ceiling-mounted Quest systems maximize floor space while delivering high-capacity moisture removal.

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HIGH EFFICIENCY

No dehumidifier is more efficient

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PATENTED MULTI-COIL TECHNOLOGY

Achieves highest efficiencies
available in the market

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INDUSTRY’S LOWEST AMP DRAW

More efficient units have less heat output and free up electricity for other equipment

QUEST 100

High Capacity Dehumidifier Series

Model #4044590

  • Capacity 100 Pints/Day
  • Efficiency 7.5 Pints/kWh
  • Supply Voltage 110-120V, 60 Hz
  • Current Draw 5 Amps
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QUEST 225 208/230V

High Capacity Dehumidifier Series

Model #4046100

  • Capacity 225 Pints/Day
  • Efficiency 7.6 Pints/kWh
  • Supply Voltage 208-230V, 60 Hz
  • Current Draw 6.1 @208V / 5.5 @230V
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QUEST 506 208/230V

High Capacity Dehumidifier Series

Model #4046300

  • Capacity 500 Pints/Day
  • Efficiency 9.2 Pints/kWh
  • Supply Voltage 208-230V
  • Current Draw 10.9 @208V / 9.9 @230V
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QUEST 746 480V

High Capacity Dehumidifier Series

Model #4046320

  • Capacity 730 Pints/Day
  • Efficiency 8.3 Pints/kWh
  • Supply Voltage 480V – 3 Phase
  • Current Draw 4.9 Amps
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Portable Dehumidifiers

Designed for flexibility and mobility, portable Quest units deliver powerful moisture removal without complex installation.

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INTERNAL CONDENSATE PUMP

With detachable hose

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MOVABLE COMPACT UNIT

Integrated handles for mobility and a small
footprint that won’t interfere with operations

QUEST Hi-E Dry 195

Portable Dehumidifier Series

Model #4046400

  • Capacity 195 Pints/Day
  • Efficiency 6.1 Pints/kWh
  • Supply Voltage 115V
  • Current Draw 12 Amps
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QUEST Hi-E Dry 140

PORTABLE Dehumidifier Series

Model #4045100

  • Capacity 135 Pints/Day
  • Efficiency 7.2 Pints/kWh
  • Supply Voltage 110–120V
  • Current Draw 6.8 Amps
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Accessories to Optimize Performance

Enhance your Quest system with airflow and filtration upgrades designed for cultivation environments.

Ventilation

Filters

Ducting

Controllers