Quest 746 High-Efficiency Overhead Dehumidifier with M-CoRR™ Technology

 – 730 Pints/Day, 480V, MERV-13 Filtration

The Quest 746 High-Efficiency Overhead Dehumidifier is engineered for the most demanding large-scale commercial and industrial environments where extreme moisture control and electrical efficiency are critical. Delivering up to 730 pints of moisture removal per day, this 480V unit utilizes patented M-CoRR™ Technology with a multi-coil refrigeration design to recycle energy and achieve unmatched efficiency at high capacity. Designed to operate at higher voltage with lower amperage, the Quest 746 reduces electrical panel strain while providing reliable, continuous-duty performance. With advanced MERV-13 filtration, flexible installation options, and rugged construction, it is a powerful solution for maintaining optimal environmental conditions in expansive facilities.

Key Features & Benefits

• 730 Pints/Day Ultra-High Capacity – Built for massive moisture loads in large commercial, industrial, and agricultural facilities.

• Patented M-CoRR™ Technology – Multi-coil system recycles energy during dehumidification for superior efficiency and reduced heat output.

• Optimized 480V Operation – Low amp draw frees electrical capacity for other equipment and simplifies power distribution.

• Industry-Leading Energy Performance – Achieves up to 8.3 pints/kWh, delivering exceptional efficiency at scale.

• MERV-13 Air Filtration – Removes dust, pollen, mold spores, bacteria, and select airborne contaminants to improve air quality.

• Overhead or Ground Installation – Flexible placement options support a wide range of facility layouts.

• Auto-Restart Functionality – Automatically restores settings after power outages for uninterrupted operation.

• Commercial-Grade Reliability – ETL/UL/CSA certified, California Title 24 compliant, and backed by a 5-year warranty.

• Made in the USA – Engineered and assembled in Madison, Wisconsin for long-term durability and performance.

Technical Specifications

• Capacity (80°F / 60% RH): 730 Pints/Day

• Efficiency: 8.3 Pints/kWh

• Energy Factor: 3.9 L/kWh

• Power: 3,665 W

• Voltage: 480 V

• Current Draw: 4.9 Amps

• Airflow: 1,650 CFM

• Total BTU: 45,700

• Operating Temperature: 56–95°F

• Air Filter: MERV-13 (18 in x 20 in x 2 in)

• Refrigerant: R454B (104 oz)

• Drain Connection: 3/4 in Threaded NPT

• Power Connection: Hard-Wire Only

• Certifications: ETL / UL / CSA

• Dimensions: 28.9 in L × 27 in W × 44.8 in H

Performance Overview

The Quest 746 is purpose-built for environments where humidity control directly affects operational efficiency, equipment longevity, and product quality. Its high-voltage, low-amperage design allows facilities to deploy extreme dehumidification capacity without overloading electrical systems. The advanced MERV-13 filtration system improves indoor air quality while maintaining high airflow, making the Quest 746 an ideal solution for continuous-duty, mission-critical applications.

Ideal Uses & Applications

• Large-scale indoor farming & CEA facilities

• Commercial greenhouses & nurseries

• Hydroponics, aeroponics, aquaponics

• Seed storage & urban agriculture hubs

• Warehouses & distribution centers

• Laboratories & research facilities

• Cold storage & mechanical rooms

• Data centers & electronics manufacturing

• Industrial spaces & military warehouses

About the Brand

Quest Climate is a global leader in high-efficiency dehumidification solutions for agricultural, commercial, and industrial applications. Known for advanced engineering, durable construction, and long-term energy savings, Quest products are trusted in mission-critical environments worldwide.

When maximum capacity, electrical efficiency, and reliability are essential, the Quest 746 High-Efficiency Overhead Dehumidifier delivers unmatched performance—engineered for large-scale operations and backed by a 5-year warranty.