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White Quest 335 dehumidifier (350 pints/day), green accents, visible pleated filter, and control panel.
White Quest 335 dehumidifier (350 pints/day) with front air grilles and a side control panel.
White Quest 335 dehumidifier (350 pints/day), green accents, visible pleated filter, and control panel.
White Quest 335 dehumidifier (350 pints/day) with front air grilles and a side control panel.

Quest 335 208/230V High Efficiency Dehumidifier — 350 Pints/Day

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MODEL: 4046200
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Quest 335 208/230V High Efficiency Dehumidifier — 350 Pints/Day

Struggling to control extreme moisture levels in your commercial facility? The Quest 335 208/230V dehumidifier is a powerhouse from the Quest lineup engineered for the most demanding environments, from indoor farms to water treatment plants, where standard 208/230V power is available.

This high-performance unit extracts an incredible 345 pints of moisture per day while maintaining an industry-leading efficiency of 8.0 pints per kWh. At its core is the patented M-CoRR™ multi-coil technology, which recycles excess heat to maximize energy efficiency and significantly reduce the heat load in your space. Combined with superior MERV 13 filtration—65% more effective than MERV 8 filters—it ensures your air is not just dry, but clean.

Engineered for reliability, the Quest 335 features innovative filter compensation technology that automatically adjusts fan speed to maintain a consistent 900 CFM airflow as the filter collects contaminants. Built in Madison, Wisconsin, this plug-and-play unit offers digital controls, external control options, and uses eco-friendly R454B refrigerant, making it one of the most efficient commercial dehumidifiers for sale today. For smaller spaces, consider the Quest 225, or for even greater capacity, the Quest 506.

Quest Made in the USA and 5 Year Warranty Badges

What's Included

  • 1x Quest 335 Dehumidifier
  • 4x Leveling Feet
  • 1x Drain Hose
  • 1x Drain Adapter (3/4" NPT PVC to 5/8" Hose Barb)
  • 4x Rivnut Plugs

Features

⚡
Patented M-CoRR™ Technology

Multi-coil design recycles heat for 8.0 pints/kWh efficiency and reduced BTU output.

🔌
208/230V Plug-and-Play

Standard single-phase power with a 6-foot cord and NEMA 6-15P plug for easy setup.

🌀
Smart Filter Compensation

Automatically adjusts fan speed to maintain a constant 900 CFM as the filter loads.

🌿
Eco-Friendly R454B Refrigerant

Features a 78% lower global warming potential for enhanced environmental responsibility.

🎛️
Digital Control System

Includes onboard digital controls with the capability for external control integration.

🏗️
Flexible Installation

Can be placed on the ground or mounted overhead, with integrated handles and auto-restart.

Installation Options

The Quest 335 offers two primary installation configurations to accommodate your space requirements:

Quest Quest 335 208/230V High Efficiency Dehumidifier freestanding installation option
Freestanding Unit

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

Quest Quest 335 208/230V High Efficiency Dehumidifier overhead mounting option
Overhead Mounting

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

Quest Quest 335 208/230V High Efficiency Dehumidifier P-trap requirement diagram
P-Trap Requirements

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

Specifications

Specification Value
Water Removal @ 80°F/60% RH 345 Pints/Day
Efficiency @ 80°F/60% RH 8.0 Pints/kWh
Supply Voltage 208–230 VAC, 1 Phase, 60 Hz
Current Draw 8.4A @208V / 7.6A @230V
Power Consumption 1,700 Watts
Operating Temperature Range 56°F Min – 95°F Max
Air Flow (CFM) 900
Unit Dimensions 32.9″ L x 24.6″ W x 23.7″ H
Unit Weight 215 lb
Control Type Onboard digital controls with low voltage terminal block
Air Filter MERV Rating MERV 13
Air Filter Dimensions 20″ x 22″ x 2″
Power Cord 14ga NEMA 6-15P (6′)
Refrigerant Type R454B
Refrigerant Amount 3 lb 8 oz
Drain Port Connection 3/4″ Threaded NPT
Fan Type Variable Speed EC Motor
Part Number 4046200

Warranty

The Quest 335 208/230V dehumidifier is backed by a comprehensive 5-year limited 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 the filter compensation technology work?+

The Quest 335 features intelligent filter compensation that automatically increases fan speed as the MERV 13 filter becomes clogged. By monitoring static pressure, it adjusts to maintain a consistent 900 CFM airflow, ensuring optimal performance throughout the filter's lifespan without needing manual adjustments.

What are the electrical advantages of the 208/230V configuration?+

This model offers flexible installation with standard single-phase power. It draws 8.4 amps at 208V or 7.6 amps at 230V, making it compatible with most commercial electrical systems. The unit includes a 6-foot power cord with a NEMA 6-15P plug for simple plug-and-play setup, avoiding the need for hardwiring.

How does R454B refrigerant benefit sustainability?+

The Quest 335 uses R454B refrigerant, which has a 78% lower Global Warming Potential (GWP) compared to traditional refrigerants. This environmentally-conscious choice significantly reduces greenhouse gas emissions while delivering top-tier dehumidification performance.

What makes the Quest 335 ideal for indoor agriculture?+

The Quest 335 is engineered for the heavy moisture loads in indoor farms. Its MERV 13 filtration captures airborne contaminants like pollen and mildew, while the M-CoRR™ technology reduces heat output, lessening the strain on your cooling systems. To learn more, read our guide on choosing a dehumidifier for your grow space.

What control options are available?+

This unit offers versatile control options, including an onboard digital interface for standalone operation and a low voltage terminal block for integration with external systems. For advanced climate management, it is fully compatible with accessories like the Quest DEH 3000R Climate Controller.

How does the Quest 335 reduce operating costs?+

The Quest 335 delivers significant cost savings through its 8.0 pints/kWh efficiency, which minimizes electricity use. It also reduces cooling costs by lowering heat output and helps prevent crop loss from issues like mold. Maintaining optimal humidity is key to avoiding problems detailed in our bud rot prevention guide.

How does this model compare to the 277V version?+

Both models deliver identical performance (345 PPD, 8.0 pints/kWh) and are top-tier models in the full range of Quest dehumidifiers. The key difference is the electrical configuration: this 208/230V model offers plug-and-play convenience for standard commercial power, while the 277V version is designed for facilities with higher voltage infrastructure.

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