Quest 746 480V
High Capacity Series
Model #4046320
@ 80 F / 60% RH
- Capacity 730 Pints/Day
- Efficiency 8.3 Pints/kWh
- Supply Voltage 480V – 3 Phase
- Current Draw 4.9 Amps
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.
Straight from madison, WI
The Quest 746 480V dehumidifier is engineered and assembled in Madison, Wisconsin. It’s backed by a 5-year warranty for peace of mind. In addition, this unit meets California Title 24 requirements for ducted (whole-home) installations.
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
Features
OVERHEAD OR GROUND PLACEMENT
Built to fit what works for your space
WIDEST OPERATING RANGE
Of temperature and relative humidity
UL RATED AND 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.
Specifications
@ 80 F / 60% RH
Water Removal
730Pints/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
California title 24 compliant
Ducted Energy Factor
7.7 Pints/kWh @ 73 F | 60% RH
Part Number
4046320
Dehumidifier Type
Refrigerant Dehumidifier
CFM
1,650
Operating Temperature
56 F Min–95 F Max
Supply Voltage
480V – 3 Phase
Unit Dimensions
44.8″ L x 28.9″ W x 27.4″ H
Unit Weight
300 lb
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
Installation Options
Freestanding unit
Can be mounted overhead with use of 3/8″ Threaded Rod
P-Trap Requirements
Sizing & Selection
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