Skip to content
Quest 746 Overhead Dehumidifier - 480V
Quest 746 Overhead Dehumidifier - 480V - Green Thumb Depot

Quest 746 Overhead Dehumidifier - 480V

See more by Quest
SKU: 30856

Official Distributor

$11,499.95

Or

Monthly payments start at:

$319.44/mo

Learn More

  • Ships in 1-5 days at most
Contact us about commercial pricing

Notify me when back in stock

Free Shipping

On most orders

Call Us

(833) 416-0375

Mon-Fri 9am-6pm CST

Lowest Price Guranteed

There is never a better price,

we can always price match

No Sales Tax

Absolutely no tax on any purchase

Easy Returns

Always hassle free

Free Shipping

Lowest Price Gurantee

No Sales Tax

Easy Returns

The Quest 746 Overhead Dehumidifier - 480V is a state-of-the-art, high-capacity dehumidification system designed for the most demanding and expansive environments. This industrial-grade unit is capable of removing an incredible 746 pints of moisture per day, making it an ideal choice for very large spaces such as massive commercial grow operations, extensive industrial warehouses, or large-scale storage facilities. Operating on a 480V power supply, the Quest 746 is engineered for efficiency and power, providing maximum dehumidification with a significantly lower energy footprint compared to other models in its class.

Its overhead design is a key feature, allowing for strategic placement that maximizes space efficiency while ensuring uniform moisture control throughout the area. The Quest 746 is renowned not only for its impressive moisture removal capacity but also for its energy efficiency, which is crucial in reducing operational costs and environmental impact in settings where continuous, high-volume dehumidification is essential.

Constructed with durability and longevity in mind, the Quest 746 features robust build quality and user-friendly controls, making it a reliable and straightforward solution for maintaining optimal humidity levels in challenging and extensive environments. The Quest 746 Overhead Dehumidifier represents the pinnacle of dehumidification technology, offering unparalleled performance for those who need a powerful, efficient, and space-saving solution to manage excessive humidity in large-scale settings.

img

Quest 746 Pint Overhead Dehumidifier

Quest 746 Overhead Dehumidifier: Unrivaled energy efficiency for large-scale operations. Removes 746 pints/day, ideal for indoor grows. Patented M-CoRR Technology maximizes efficiency, engineered in Madison, Wisconsin. Operates at higher voltage, lower amperage, ensuring longevity and superior air quality. Top choice for maintaining optimal humidity in challenging environments.

Product Overview

Videos

Specifications

What's Included?

Warranty Policy

Product Overview

Invest in success with Quest Dehumidifier for energy-efficient indoor grow operations. Its innovative design minimizes HVAC heat load, ensuring rapid ROI. Combat threats like powdery mildew and bud rot with Quest's proper sizing, placement, and airflow control options. Whether in a greenhouse or hydroponic system, Quest provides flexible and customizable solutions for optimal conditions and crop protection.

Quest: Pioneering Energy-Efficient Dehumidifiers for Optimal Performance

Quest leads the market with the most energy-efficient dehumidifiers, offering high capacity, superior air filtration, and a comprehensive humidity control product line. Renowned for top-quality solutions, Quest ensures optimal conditions for various applications and provides superior U.S. technical support. Every Quest product comes with a full warranty, showcasing the brand's commitment to quality and customer satisfaction. With innovative patented technology developed in Madison, Wisconsin, Quest is a trusted name for unparalleled efficiency and technical excellence in dehumidification.

Energy Efficiency

High Capacity and Quality

Smart Technology

Superior Air Filtration

Comprehensive Product Line

U.S. Technical Support and Service

Full Warranty

Patented Technology

QUEST'S PATENTED TECHNOLOGY | M-CoRR™

Quest sets the industry standard by providing the most energy-efficient dehumidification solutions, a feat achieved through our exclusive patented multi-coil design, known as M-CoRR (Multi-Coil Refrigeration Recovery). This groundbreaking technology is unique to Quest, setting our dehumidifiers apart from the competition.

M-CoRR is meticulously engineered for maximum performance, positioning Quest as the pinnacle of energy efficiency and offering the best return on investment.

The technology's innovative design excels across a broad spectrum of dew points, even in colder temperatures, and maintains optimal capacity regardless of fluctuations in airflow. This ensures that Quest dehumidifiers not only stand out for their unparalleled efficiency but also prove to be a wise investment, paying for themselves through significant energy savings over time.

How Does Quest's M-CoRR Technology Work?

Quest's M-CoRR Technology revolutionizes dehumidification by utilizing three separate coils - pre-evaporator, evaporator, and recovery coil. This innovative approach enhances efficiency by kickstarting the cooling process, extracting water efficiently, and recycling energy. Quest's commitment to pushing technology boundaries ensures superior moisture control and energy utilization in dehumidification systems.

Highlighted features of M-CoRR

Highest Efficiency.
Lowest Energy Usage

Higher efficiency = lower electricity usage per pint of water removed. M-CoRR technology pulls more water out of the air per kilowatt hour than any other dehumidification technology. Period.

Less Heat Output

Inefficiency = Heat. It takes energy to run the fan and compressor in your dehumidifier. During dehumidification, this energy converts to heat that warms your room. The more energy your dehumidifier consumes, the more heat it expels. Quest dehumidifiers featuring M-CoRR technology are the most efficient dehumidifiers in the world, which means they put less heat in your environment.

More Capacity,
Smaller Footprint

Your space is valuable. Dehumidifiers powered by M-CoRR are more compact. This technology averages over 20% smaller than traditional LGR dehumidification technology of the same capacity.

Quest Dehumidifier 746 - Overhead Series

The Quest Dual 746 is a groundbreaking dehumidifier in the 480V category, designed for efficiency and high capacity. It efficiently removes 746 pints of moisture per day with an efficiency rating of 7.2 pints/kWh, making it one of the most energy-efficient, high-capacity dehumidifiers available. Operating at just 6.5 amps, it exemplifies energy-saving performance. The Quest 746 offers flexible installation options, including suspension or freestanding setups, thanks to its compact design. Proudly made in the USA, this unit is built with the highest quality components, ensuring durability and reliability for your high-capacity dehumidification needs in industrial and commercial settings.


FAQ Section

How do I size a dehumidifier for a grow room?
Plants transpire about 97% of the water they receive, so the amount of water your plants consume is approximately the amount that needs to be removed each day. For example, 30 plants each receiving ½ gallon per day is an average of 15 gallons water per day. Every gallon of water is 8 pints. This example works out to 120 pints per day.
Isn’t my air conditioner a dehumidifier?
Yes, but there are issues with this solution.
1. Air conditioners remove water only when they are running. In most cases when the grow lights are off, the air conditioner is off as well. Lights-off time is when humidity is most problematic.
2. Using an air conditioner to dry a room will overcool the room, potentially causing plant stress. This will also use a significantly greater amount of energy than a Quest commercial dehumidifier.
3. The more energy efficient the air conditioner, the less moisture it actually removes. An efficient air conditioner is a terrible dehumidifier.
4. The re-heat method. Some air conditioners offer an optional heating coil as a dehumidification option. Essentially, by adding artificial heat to the room, the air conditioner is forced to operate when the lights are off and thus the air conditioner removes water. While this method works, and can be used in a pinch, it’s a poor long term solution and will use 4-8x the energy as a Quest dehumidifier. 4-8x the energy use is roughly equal to $5,000-$25,000 per year in unnecessary energy consumption.
What is the ideal humidity?
Because every plant is different, it is hard to pick just one number. However, most research indicates that 45-55% RH is the safe zone where plants are healthy, spore germination is unlikely, and pests find the environment unappealing.
How much money does a Quest dehumidifier save me in electricity?
Quest is the leader in energy efficiency and one of our models is the most energy efficient dehumidifier ever built. Depending on the model, Quest dehumidifiers can save commercial growers $100-$200 a month in electricity per unit. That’s $1,200-$2,500 per dehumidifier per year.
Can the water be reused?
Yes, Quest dehumidifiers produce neutral pH, very low TDS water. This water is safe for all plants, even consumable ones.
Is there a warranty for this product?
Please check the warranty tab on this page for warranty information.
How long will shipping take?
Please check our shipping policy here for shipping information.
What is the return policy?
Please check our return policy here for return policy information.

Quest 746 Specifications

@ 80° F/60% RH
Water Removal 746 Pints/Day
Efficiency 703 Pints/kWh
Energy Factor 3.5 Liters/kWh
Current Draw 6.5 Amps
@ 75° F/50% RH
Water Removal 530 Pints/Day
Efficiency 5 Pints/kWh
Energy Factor 2.4 Liters/kWh
Additional Specifications Quest 165
Part Number 4037610
Dehumidifier Type Refrigerant Dehumidifier
CFM 1750
Operating Temperature 56°-95° F
Supply Voltage 480V
Unit Dimensions 29" W X 33.8" H X 44.8" L
Unit Weight 340 lb
Control Type Requires External Control
Air Filter MERV Rating MERV 13
Air Filter Dimensions 18" x 20" x 2"
Power Cord Hardwire Only
Refrigerant Type R410A
Refrigerant Amount 6 lb 7 oz
Drain Port Connection 3/4" Threaded NPT
Warranty 5 Year

Items in the box

Quest 746 Dehumidifier Unit

Power Cord

Drain Hose

User Manual

Warranty Information

Warranty Policy

Please Click Here to view our return and warranty policy