Quest 506 277V High-Capacity Dehumidifier – QU13366

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Quest

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Model

QU13366

ID

199397

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Product Features
  • Capacity : 500 Pints/Day
  • Airflow: 1,150 CFM
  • Controls: Digital control interface with external control option
  • Dimension: 44.8″ L x 29.0″ W x 27.4″ H
  • Air Filter: MERV 13
  • Application: Warehouses, indoor agriculture facilities, water treatment spaces, restoration projects

OVERVIEW

The Quest 506 High-Capacity Dehumidifier – 277V (Model: 4046310) is an ultra-high-performance commercial dehumidification system designed for large-scale industrial, agricultural, and controlled-environment applications. Built for maximum moisture removal efficiency, it is engineered to maintain strict humidity control in expansive spaces where consistent environmental stability is critical. Operating on 277V power, the Quest 506 delivers extreme dehumidification capacity while maintaining low amperage draw for its class. It uses advanced multi-coil refrigeration technology and R454B refrigerant to improve efficiency, reduce energy consumption, and minimize heat output into the surrounding environment.

With a capacity of up to 500 pints per day under standard conditions, this unit is one of the most powerful single-phase commercial dehumidifiers available. It is commonly used in large facilities such as industrial warehouses, indoor agriculture operations, restoration projects, and other high-moisture environments requiring continuous operation.

Key Features

  • 500 Pints Per Day Capacity: Extremely high-output moisture removal for large industrial environments.
  • 277V Operation: Designed for commercial electrical systems with low amperage draw for its class.
  • R454B Refrigerant System: Efficient and environmentally improved refrigerant technology.
  • M-CoRR Multi-Coil Technology: Enhances energy efficiency and reduces heat output.
  • High Airflow Design: Supports large-volume air processing for consistent humidity control.
  • Continuous Duty Operation: Built for 24/7 use in demanding industrial conditions.
  • Advanced Filtration System: Helps capture airborne particulates for improved air quality.

Control Options

The Quest 506 High-Efficiency Dehumidifier features simple and convenient control options for efficient moisture management. It includes an integrated digital onboard control interface for easy adjustment of humidity settings and operating modes. The unit is also compatible with external control devices such as remote humidistats and condensate pump safety switches for added installation flexibility.

Warranty information

The Quest 506 is backed by a dependable 5-Year Limited Warranty for long-term reliability and peace of mind. The warranty includes 1 year of coverage on parts and labor, along with extended coverage on the sealed refrigerant system components from years 2 through 5. Refer to official Quest documentation or an authorized dealer for complete warranty terms.


Heavy-Duty Dehumidification for Large Facilities

Built to handle extreme moisture loads, the Quest 506 277V is capable of removing up to 506 pints of moisture per day, making it one of the most powerful dehumidifiers available in the Quest commercial product lineup. At the core of the Quest 506 277V is Quest’s patented M-CoRR® multi-coil refrigeration technology, engineered to maximize moisture removal while minimizing energy consumption. This advanced system delivers industry-leading efficiency and reliable performance across a wide range of operating conditions, helping facilities reduce operational costs while maintaining consistent environmental control. The Quest 506 277V utilizes the more environmentally friendly R454B refrigerant, helping reduce environmental impact while maintaining outstanding dehumidification performance. The Quest 506 277V also enhances indoor air quality through integrated MERV-13 filtration, which helps capture airborne particles such as dust, pollen, mold spores, and other contaminants before air is recirculated throughout the environment.


Why Choose Quest 506 277V High Capacity Dehumidifier

  • Extreme Moisture Removal Capacity: Ideal for large industrial facilities and high-humidity commercial environments.
  • Designed for 277V Systems: Simplifies integration into commercial and industrial building infrastructures.
  • Energy-Efficient Operation: Helps reduce electricity usage and long-term operating costs.
  • Helps Prevent Moisture Damage: Maintains stable humidity levels to protect structures, inventory, and equipment.
  • Improved Indoor Air Quality: MERV-13 filtration supports cleaner and healthier indoor environments.
  • Ideal for Demanding Applications: Perfect for grow facilities, warehouses, manufacturing plants, greenhouses, and restoration projects.
  • Flexible Space-Saving Installation: Overhead mounting capability helps preserve valuable floor space.
  • Built for Continuous-Duty Performance: Commercial-grade construction supports dependable long-term operation.
More Information
Quest 506 277V High-Capacity Dehumidifier – QU13366
FeatureSpec
SKUQU13366
Weight (in lbs)275
Size500 Pints
Brand/ManufacturerQuest
UPC810017961757
Additional InformationAuto-Restart
Additional InformationCertifications: ETL, UL
Additional InformationEnergy Factor: 3.8 L/kWh
Heating BTU22,800
Maximum CFM1150 CFM
Square Foot4,000+
Speed1 Speed
RefrigerantR454B
Capacity500 pints
Electrical277 V
Wattage2700 W
Max Breaker Size10 Amps
Length44.8"
Height27.4"
Width28.9"
Pint Capacity200+
Additional InfoCabinet Width: 28.9"
Warranty5-year limited warranty
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
Top reviews
  1. Quest 100
    Quality
    100%
    Service
    100%
    Price
    100%
    Using in unfinished basement on floor. The shipping pallet is useful as a stand and the screw in legs allow to slant the unit to aid drainage. It is quiet and its smaller size and weight are huge positives relative to alternatives. Quickly and efficiently reduced humidity to desired level. So far so good.

    Review by

    Posted on

Customer Questions
Who Makes Quest?
Quest dehumidifiers are proudly manufactured in the United States, specifically in Madison, Wisconsin. This is the home base of Therma-Stor LLC, the company behind the Quest brand. Therma-Stor has built a strong reputation in the HVAC and indoor air quality industries for producing high-performance, durable, and energy-efficient dehumidification systems.
Is installation difficult or do I need a professional?
While many Quest units are plug-and-play, larger models or those requiring overhead mounting may need a professional HVAC technician for safe and proper installation.
How do I know which Quest dehumidifier model is right for my space?
Start by measuring the square footage and ceiling height of your space. Then, consider moisture levels and how often the area is in use. Quest offers models with capacities ranging from around 70 to over 500 pints per day, so there’s an option for everything from small grow rooms to large industrial spaces.
What kind of maintenance is required?
Routine maintenance includes checking and replacing filters regularly, inspecting drainage lines, and cleaning the coils periodically. Most users find the upkeep simple and manageable.
How often do I need to clean or change the filter?
Most customers check the filter every 1–3 months. Depending on dust levels and usage, you may need to clean or replace it quarterly.
What is the warranty on Quest dehumidifiers?
Quest dehumidifiers come with a 5-year warranty on parts and refrigerant system components, offering long-term reliability and peace of mind.
How noisy are Quest dehumidifiers?
Noise levels vary by model, but most units are quiet enough for use in occupied commercial spaces. For grow rooms and workspaces, the sound is often comparable to a running HVAC system.
Can I run the dehumidifier continuously?
Yes, most Quest dehumidifiers are built for continuous operation. They include features like automatic defrost and humidity set points to maintain consistent performance without constant supervision.
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