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Quest dehumidifier with pleated filter and digital control panel.
Quest 335 dehumidifier with vertical louvers on the front panel and a black intake vent on the side.
Quest dehumidifier with pleated filter and digital control panel.
Quest 335 dehumidifier with vertical louvers on the front panel and a black intake vent on the side.

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

Price:
$5,699.95 USD
Or
Pay as little as
$569995/mo
for a term that suits you, up to 36 months. Learn More

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To calculate 10 percent of a number, simply divide it by 10 or move the decimal point one place to the left. For example, 10 percent of 230 is 230 divided by 10, or 23.
pricePoints: 5699.95
5,700
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MODEL: 4046200
Order today, ships between December 25 - January 12, 2026
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Quest 335 208/230V High Efficiency Dehumidifier — 350 Pints/Day

Battling heavy moisture loads in a commercial space that demands peak efficiency and precise climate control? The Quest 335 208/230V dehumidifier is the definitive solution, engineered in the USA for the most demanding applications, from indoor agriculture to water treatment facilities. It's the perfect plug-and-play unit for any facility using standard 208/230V single-phase power.

This high-performance unit extracts an incredible 345 pints of moisture per day while setting a new standard for efficiency at 8.0 pints per kWh. Its patented M-CoRR™ multi-coil technology recycles excess heat during operation, dramatically boosting energy savings and reducing the heat output into your space. This makes it one of the most efficient industrial dehumidifiers on the market.

Built for relentless, continuous operation, the Quest 335 thrives in temperatures from 56°F to 95°F. It features industry-leading MERV 13 filtration—up to 65% more effective than standard MERV-8 filters—to capture fine particles and protect your environment. Innovative filter compensation technology automatically adjusts fan speed as filters get dirty, ensuring a consistent 900 CFM airflow without performance drops. For facilities with different capacity needs, Quest also offers models like the smaller Quest 225 or the larger Quest 506.

What's Included

  • 1x Quest 335 208/230V 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 consistent 900 CFM as filters load.

🌿
Eco-Friendly R454B Refrigerant

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

🎛️
Digital Control System

Includes onboard digital controls with seamless external control integration capability.

🏗️
Flexible Installation

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

Quest 335 High-Efficiency Series Installation Options

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

Quest Quest 335 Dehumidifier freestanding installation
Freestanding Unit

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

Quest Quest 335 Dehumidifier overhead mounted installation
Overhead Mounting

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

Quest Quest 335 Dehumidifier P-Trap requirements 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. This extensive coverage reflects Quest's confidence in their Madison, Wisconsin-engineered equipment, providing 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. This system monitors static pressure and adjusts the fan to maintain a consistent 900 CFM airflow, ensuring optimal performance throughout the filter's life without manual intervention.

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

The 208/230V configuration 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 installation, unlike many other industrial dehumidifiers that require 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 maintaining optimal dehumidification performance.

What makes the Quest 335 ideal for indoor agriculture?+

The Quest 335 is engineered for the heavy moisture loads found in indoor agriculture. Key benefits include:

  • MERV 13 filtration captures pollen, powdery mildew, and other airborne contaminants.
  • M-CoRR™ technology reduces heat output to minimize stress on your cooling system.
  • Filter compensation maintains consistent airflow as filters collect organic matter.
  • A wide operating range of 56°F to 95°F handles varying grow cycle conditions.

For more details on optimizing your grow room environment, check out our complete guide to Quest dehumidifiers.

How does the Quest 335 208/230V compare to the 277V version?+

Both models deliver identical performance (345 pints/day, 8.0 pints/kWh). The key difference is the electrical configuration:

  • 208/230V model: Uses standard single-phase power with a plug-and-play cord, compatible with most commercial facilities.
  • 277V model: Designed for higher voltage operation, offering a lower amperage draw (6.3A) ideal for facilities with existing 277V infrastructure.

Choose the 208/230V for standard electrical systems or the 277V for specialized commercial installations.

What control options are available?+

The Quest 335 provides versatile control options, including an onboard digital interface for standalone operation and a low voltage terminal block for easy integration with external controllers and building management systems. It also features an auto-restart function that returns to its previous settings after a power outage.

Shipping & Returns

Order Processing & Shipping

We currently ship within the United States only. No international shipping is available at this time.

Order Processing:

  • Most orders are processed within 24-48 hours after being placed.
  • Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

Shipping Times:

We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

  • USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
  • FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
  • UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

Note:

  • These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
  • For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

Free Shipping

Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

Refunds & Returns

Cancellations are accepted within 24 hours of placing an order.
Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more

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