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White Quest 746 industrial dehumidifier with a honeycomb grille, circular fan opening, and green top accents.

Quest 746 480V Industrial Dehumidifier — 746 Pints/Day

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MODEL: 4037610
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Quest 746 480V Industrial Dehumidifier — 746 Pints/Day

Struggling with industrial-grade humidity control that overwhelms your electrical system? The Quest 746 480V dehumidifier is the solution, delivering exceptional moisture removal while operating at maximum energy efficiency for large-scale commercial applications.

Perfect for agriculture, manufacturing, and warehouses, this unit removes up to 746 pints of moisture per day with an impressive 7.3 pints per kWh efficiency rating. This performance is achieved through the patented M-CoRR™ multi-coil technology, which reuses energy to make it the most efficient 480-volt dehumidifier on the market. For facilities with even greater demands, consider the larger Quest 876.

Engineered for continuous operation in demanding environments, the Quest 746 functions effectively from 56°F to 95°F. It features integrated MERV 13 filtration to remove dust, pollen, mold, and bacteria. Assembled in Madison, Wisconsin, this unit's 480V three-phase configuration draws only 6.5 amps, freeing up valuable panel space for other equipment. For optimal performance, pair it with a dedicated Quest DEH 3000R Climate Controller.

Features

⚡
Patented M-CoRR™ Technology

Multi-coil design reuses energy for industry-leading 7.3 pints/kWh efficiency.

🔌
Low Amperage Draw

480V operation requires only 6.5 amps, freeing electrical panel space.

🏭
Commercial Grade Construction

UL rated and ETL listed with integrated handles for flexible installation.

🌡️
Wide Operating Range

Functions effectively from 56°F to 95°F across varying humidity levels.

🌀
MERV 13 Filtration

Superior air cleaning removes dust, pollen, mold, bacteria, and viruses.

🔄
Auto Restart Function

Automatically returns to previous settings after power outages.

Quest 746 California Title 24 Compliance

The Quest 746 480V dehumidifier meets California Title 24 energy standards for both ducted (whole-home) and non-ducted (portable) installations. This compliance ensures the unit meets strict energy efficiency requirements for commercial applications in California and other jurisdictions with similar standards.

  • Non-Ducted Energy Factor: 6.3 Pints/kWh @ 65°F | 60% RH
  • Ducted Energy Factor: 7.1 Pints/kWh @ 73°F | 60% RH

Quest 746 Installation Options

The Quest 746 offers two primary installation configurations to accommodate your space requirements:

Quest Quest 746 480V Industrial Dehumidifier as a freestanding unit
Freestanding Unit

Place the unit directly on the floor with integrated handles for positioning and maintenance access.

Quest Quest 746 480V Industrial Dehumidifier mounted overhead
Overhead Mounting

Mount using 3/8" threaded rod through integrated hanging points to maximize floor space utilization.

Quest Quest 746 480V Industrial Dehumidifier P-Trap requirements
P-Trap Requirements

Both configurations require proper P-trap installation for condensate drainage through the 3/4" threaded NPT drain port.

Quest 746 Specifications

Specification Value
Water Removal @ 80°F/60% RH 746 Pints/Day
Efficiency @ 80°F/60% RH 7.3 Pints/kWh
Supply Voltage 480V – 3 Phase
Current Draw 6.5 Amps
Power Consumption 4,266 Watts
Operating Temperature Range 56°F Min – 95°F Max
Air Flow (CFM) 1,750
Unit Dimensions 44.8″ L x 28.9″ W x 34.1″ H
Unit Weight 340 lb
Air Filter MERV Rating MERV 13
Refrigerant Type R410A
Drain Port Connection 3/4″ Threaded NPT
Part Number 4037610

Warranty

The Quest 746 480V dehumidifier is backed by a comprehensive 5-year warranty, reflecting Quest's confidence in the quality and durability of their Madison, Wisconsin engineered and assembled equipment. This extensive warranty coverage provides peace of mind for commercial applications requiring reliable, continuous operation.

FAQs

How does M-CoRR™ technology improve efficiency?+

The patented M-CoRR™ (Multi-Coil Refrigerant Recovery) technology uses a multi-coil design to capture and reuse energy that is normally lost during dehumidification. This allows the Quest 746 to achieve its industry-leading 7.3 pints per kWh efficiency, reducing energy consumption while maintaining maximum moisture removal.

Is the Quest 746 suitable for my facility?+

With a 746 pints/day capacity and 1,750 CFM airflow, the Quest 746 is ideal for large-scale commercial applications like agriculture facilities, manufacturing plants, and large warehouses. It's an excellent choice among our range of commercial dehumidifiers. For more help, read our guide on how to choose a dehumidifier.

How does the 480V configuration benefit my electrical system?+

The 480V three-phase configuration draws only 6.5 amps, significantly less than lower voltage units with similar capacity. This low amperage draw frees up valuable space on your electrical panel for other critical equipment and can reduce infrastructure costs.

Can this unit be ducted?+

Yes, the Quest 746 is designed for ducted applications to distribute dry air effectively throughout your facility. We offer a compatible exhaust duct kit to simplify your installation process.

What maintenance is required?+

The Quest 746 requires minimal daily maintenance. Key tasks include regular inspection and replacement of the MERV 13 filter (18″ x 20″ x 2″), ensuring the condensate drain is clear, and periodic coil cleaning depending on the environment. The unit's auto-restart function simplifies operation after a power outage.

Does the Quest 746 require external controls?+

Yes, the Quest 746 requires an external controller for operation. This allows for flexible integration with building management systems or standalone humidity controllers, such as those in our environmental controllers collection.

What does the 5-year warranty cover?+

The Quest 746 includes a comprehensive 5-year manufacturer warranty covering defects in materials and workmanship. Since the entire lineup of Quest dehumidifiers are engineered and assembled in Madison, Wisconsin, you can expect robust support and service.

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