Picked up a used Twister T6 for $400 and replaced the gear box for $100 and now its like new again.
Why Quest Dehumidifiers
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
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.
HIGH EFFICIENCY
No dehumidifier is more efficient
PATENTED MULTI-COIL TECHNOLOGY
Achieves highest efficiencies
available in the market
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
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
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
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
Portable Dehumidifiers
Designed for flexibility and mobility, portable Quest units deliver powerful moisture removal without complex installation.
INTERNAL CONDENSATE PUMP
With detachable hose
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
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
Accessories to Optimize Performance
Enhance your Quest system with airflow and filtration upgrades designed for cultivation environments.
Precision Humidity = Better Harvests
Maintaining proper humidity levels helps growers:
Reduce mold & pathogen pressure
Improve transpiration
Stabilize VPD
Protect crop quality
Quest dehumidifiers are engineered specifically for agriculture and controlled environments to deliver consistent performance and energy efficiency.
Built for Growers. Backed by Experts.
Need help designing a humidity control strategy? Our cultivation specialists can help size your Quest system based on room layout, lighting load, and crop stage.