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- Model: Quest 746
- Part Number: 4046320
- Water Removal: 730 Pints Per Day
- Airflow: 1,650 CFM
- Power: 480V – 3 Phase
- Temperature Range: 56°F - 95°F
- Weight: 300 lbs
High-Efficiency Commercial Dehumidifier
The Quest 746 480V High-Efficiency Dehumidifier is the next generation of commercial and industrial dehumidification featuring Quest’s patented M-CoRRTM Technology. This multi-coil design reuses energy during dehumidification allowing it to be the most energy-efficient 480-volt dehumidifier on the market. Engineered for large-scale environments, this high-capacity unit combines superior moisture removal, energy efficiency, and smart digital controls—all in a more compact design.
The Quest 746 480V uses less amperage at a higher voltage, freeing up space on your electrical panel for other equipment, a game-changer in controlled environments. With its reduced height, it fits where other industrial dehumidifiers can’t, making it ideal for mechanical rooms, overhead installations, and space-limited facilities. Built for performance, it removes approximately 730 pints of moisture per day (80°F, 60% RH) with an industry-leading efficiency of 8.3 pints per kWh, helping facility managers lower operating costs without compromising climate control.
Now with Digital Controls
The Quest 746 now features an integrated onboard digital control panel, allowing precise humidity management with:
- Adjustable RH setpoints in 1% increments
- Filter change and defrost notifications for easier maintenance
- Self-diagnostics to speed up service and reduce downtime
- Dark Mode for reducing light in sensitive environments
- Low voltage terminal block for optional external control connection
Environmentally Responsible Refrigerant
Sustainability comes built-in. The second-generation Quest 746 utilizes 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.
Industries
- Agriculture
- Distribution & Logistics
- Energy & Utilities
- Food & Beverage
- Industrial & Manufacturing
- Inside Self-Storage
- Natural Supplements
- Science & Technology
- Sports & Recreation
Click here to view more of Quest Dehumidifiers
- Overhead or Ground Placement: Built to fit what works for your space
- Widest Operating Range: Of temperature and relative humidity
- UL Rated & ETL Listed: The highest safety standard
- Integrated Handles & Hanging Points: For easier movement and installation
- Merv 13 Filtration: Superior filtration removes more harmful contaminants from the air such as dust, pollen and mold as well as bacteria and some viruses
- Auto Restart: Unit automatically defaults to prior settings in the event of a power outage
- Industry’s Lowest Amp Draw: More efficient units have less heat output and free up electricity for other equipment
- Environmentally-concious Refrigerant: Reducing greenhouse gas emissions, R454B boasts a 78% lower GWP
- Onboard Digital Controls: For precise setpoints and easy control
- Assembled in Madison, Wisconsin: Built to last.
KEY FEATURES
- 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
- Part Number: 4046320
- Dehumidifier Type: Refrigerant Dehumidifier
- CFM: 1,650
- Operating Temperature: 56 F Min–95 F Max
- Supply Voltage: 480V – 3 Phase
- Control Type: Onboard digital control with optional external control connection
- Air Filter MERV Rating: MERV 13
- Air Filter Dimensions: 18" x 20" x 2"
- Power Cord: Hardwire Only
- Refrigerant Type: R454B
- Refrigerant Amount: 6 lb 8 oz
- Drain Port Connection: 3/4" Threaded NPT
- Warranty: 5 Year Limited
Water Removal Rates (Pints/Day)
@ 80 F | 60% RH
- Water Removal: 730 Pints/Day
- Efficiency: 8.3 Pints/kWh
- Energy Factor: 3.9 Liters/kWh
- Current Draw: 4.9 Amps
- Power: 3,665 Watts
- BTU (Total): 45,700
- BTU (Heat of Condensation): 33,200
- BTU (Motor Load): 12,500
@ 75 F | 50% RH
- Water Removal: 480 Pints/Day
- Efficiency: 6.1 Pints/kWh
- Energy Factor: 2.9 Liters/kWh
- Current Draw: 4.6 Amps
Unit Dimensions
- Length: 44.8"
- Width: 28.9"
- Height: 27.4"
- Weight: 300 lbs
