Quest 506 High-Efficiency Commercial Dehumidifier

Quest 506 High Capacity Dehumidifier – 500 Pints/Day | Available in 208/230V and 277V Models

The Quest 506 is a game-changer in commercial and industrial dehumidification. With a massive 500 pints per day capacity and industry-leading 9.2 pints/kWh efficiency, this model surpasses even the Quest 335, setting the new standard for energy-efficient moisture control. It’s ideal for grow rooms, drying rooms, warehouses, and any space where consistent humidity management is critical.

Backed by Quest’s patented M-CoRR™ multi-coil technology, the 506 captures and reuses heat energy to reduce power consumption while cutting down on added BTUs in your space. Whether you’re on 208/230V or 277V power, this unit delivers maximum performance with minimal amp draw, freeing up room on your electrical panel for other essential equipment.

Key Features

• Removes 500 pints/day at 80°F, 60% RH
• Unmatched efficiency – 9.2 pints/kWh
• M-CoRR™ Technology – multi-coil design boosts efficiency and reduces heat output
• R454B refrigerant – environmentally friendly with 78% lower GWP than R410A
• Onboard digital controls – intuitive panel for set points, diagnostics, and dark mode
• Low-voltage terminal block – ideal for remote/hard-to-reach installations
• Flexible mounting – fits overhead or on the ground
• Integrated handles & hanging points for easier positioning
• Auto-restart after power outage
• MERV 13 air filtration – traps dust, mold spores, and airborne contaminants
• Built in Madison, Wisconsin – proudly engineered and assembled in the USA
• 5-Year Limited Warranty

Voltage Options & Differences

Need 277V compatibility? Go with the 4046310.
Working with standard 208/230V wiring? The 4046300 is your best bet.

Specifications 

• Water Removal: 500 PPD (80°F, 60% RH), 320 PPD (75°F, 50% RH)
• Efficiency: 9.2 PPD/kWh (80°F), 6.8 PPD/kWh (75°F)
• CFM: 1,150 @ 0.0" WG
• Energy Factor: 4.4 L/kWh (80°F), 3.2 L/kWh (75°F)
• Dimensions: 44.8" L × 28.9"/29.0" W × 27.4" H
• Weight: 275 lbs
• Operating Temp Range: 56°F–95°F
• Air Filter: 18" × 20" × 2", MERV 13
• Refrigerant: R454B, 3 lb 14 oz
• Drain Port: ¾" Threaded NPT
• California Title 24 Compliant: Yes (ducted and non-ducted)

Ideal For:

• Large commercial grow operations
• Indoor drying facilities
• Industrial humidity control
• Warehousing and storage
• Any application where high performance + low energy use is key

If you need reliable, energy-efficient humidity control at scale, the Quest 506 High Capacity Dehumidifier delivers unmatched performance. With two voltage options (208/230V and 277V), advanced onboard controls, and ultra-efficient M-CoRR™ technology, this unit is built to meet the demands of commercial cultivation, industrial operations, and other large-scale environments. Whether you’re optimizing a grow room or safeguarding sensitive storage, the Quest 506 offers the power, precision, and flexibility you need—all backed by a trusted name in environmental control.

Shipping Note: This unit ships via freight because of its size and weight. After checkout, we’ll follow up with a custom freight quote. Want to get a shipping estimate before ordering? Just reach out—we’re happy to help.