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.

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Re-engineered with a more environmentally friendly refrigerant, R454B, the Quest 100 combines efficiency and sustainability with the versatility and flexibility of its compact footprint. This makes it the perfect dehumidifier for small projects and spaces.

M-CoRR Technology
This patented multi-coil design provides the highest efficiencies available on the market, saving energy and dollars.

In addition to our industry-leading coil system, the Quest 100 features premium MERV-13 filtration without compromising capacity or efficiency. This superior filtration helps to prevent the start or spread of bacteria, mold, or other contaminants around your precious plants, equipment, and crew with 65% more effectiveness than MERV-8 and 20% more effectiveness than MERV-11. MERV-13 filtration means healthier air and more control over your environment.

With a corrosion-resistant base and smaller footprint, the Quest 100 has flexible placement options, with less worry of rust, even after watering your plants or washing down your room.

The Quest 100 dehumidifier is engineered and assembled with quality in Madison, Wisconsin, USA. It’s backed by a 5-year warranty, providing you with confidence in your purchase. Wondering about energy efficiency regulations? This unit meets the California Title 24 requirements for both ducted (whole-home) and non-ducted (portable) installations.

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