Skip to content
Quest 100 Overhead Dehumidifier - 120V - Green Thumb Depot
Quest 100 Overhead 100 Pint Dehumidifier - 120V

Quest 100 Overhead 100 Pint Dehumidifier - 120V

See more by Quest
SKU: 4044590

Official Distributor

Found a Quest unit cheaper somewhere else?
Read this first.
$2,299.95
Preview Icon

An Important Note on Pricing and Returns:

We believe in upfront pricing and fair policies—no hidden fees, no surprises, and easy, transparent returns. If you're comparing options, we encourage you to review competitors’ fine print carefully.

We've helped countless customers who had issues elsewhere, and we’re here to make sure that never happens to you.

Or

Monthly payments start at:

$63.88/mo

Learn More

Check Icon

Monthly Payment Start at:

$63.88/mo

Learn More

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

Best price, guaranteed

Contact us to unlock it

Easy Returns

Always hassle free

Free Shipping
Exclusions apply

Lowest Price Gurantee

Easy Returns

The Quest 100 Overhead Dehumidifier - 120V is a compact yet powerful solution designed for efficient moisture control in smaller commercial or residential spaces. Operating on a standard 120V outlet, this dehumidifier is capable of removing up to 100 pints of moisture per day, making it an ideal choice for maintaining optimal humidity levels in areas such as small grow rooms, storage spaces, or basements. Its overhead design allows for space-saving installation, while its energy-efficient operation ensures minimal electricity consumption. The Quest 100 is engineered for reliability and ease of use, featuring user-friendly controls and a robust build quality, making it a practical and effective tool for combating excess humidity and protecting your space from moisture-related issues.
⚠️

Want the best legitimate Quest price? Drop your email or phone and we'll send your quote.

Quest 100 Overhead 100 Pint Dehumidifier - 120V
Something went wrong. Please try again.
✓

Thank You!

Got it, we'll reach out with your best price shortly

img

Quest 100 Overhead 100 Pint Dehumidifier - 120V

Deliver precise humidity control in compact commercial spaces with the Quest 100 Overhead Dehumidifier. Removing 100 pints daily at 80°F and 60% RH, it achieves 7.5 pints/kWh while drawing only 5 amps from a standard 110–120V supply. Patented M-CoRR™ technology, onboard digital controls, MERV-13 filtration, and auto-restart support dependable operation. Its corrosion-resistant base, compact footprint, and flexible overhead or ground placement make it ideal for cultivation, storage, processing, and other controlled environments requiring efficient, consistent moisture management.

Product Overview

Videos

Specifications

What's Included?

Warranty Policy

Product Overview

The Quest 100 combines high-efficiency dehumidification with a compact design suited to smaller projects, grow rooms, storage areas, and commercial environments. It removes 100 pints of moisture daily while limiting electrical demand and reducing unnecessary HVAC heat load. A corrosion-resistant base supports placement in wet environments, while freestanding and overhead installation options help preserve valuable floor space. Digital controls, precise humidity adjustment, auto-restart, and optional external control connectivity provide dependable environmental management across changing operating conditions. Its wide operating range supports changing temperature and humidity conditions.

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.

7.5 Pints/kWh Efficiency

100 Pint Daily Capacity

Onboard Digital Controls

MERV 13 Air Filtration

Plug-N-Play Operation

Overhead or Ground Placement

Automatic Power Restart

Patented M-CoRR Technology

⚠️
Important Notice

Found a Quest unit cheaper somewhere else? Read this first.

Quest sets a minimum advertised price, so what you see here is the lowest any authorized dealer can publicly list. If another site shows a Quest unit for less, they are not authorized, even if they say they are, and that puts your warranty at risk. Quest can refuse service and support on an unauthorized purchase.

The good news: as an authorized Quest dealer, we'll beat any legitimate price, we just can't post it publicly. Call, text, or email and we'll get you the best price available, plus same-day commercial and bulk quotes.

🔍 Want the best legitimate Quest price?
Contact us directly. As an authorized Quest retailer, we may be able to offer better pricing by phone, text, or email — especially for bulk orders.
📧 info@greenthumbdepot.com 📞 (833) 416-0375

QUEST'S PATENTED TECHNOLOGY | M-CoRR™

Quest’s patented M-CoRR™ multi-coil system is engineered to extract more moisture for every kilowatt-hour consumed. By coordinating the pre-evaporator, evaporator, and recovery coils, the system improves heat exchange, recovers useful energy, and supports the Quest 100’s 7.5-pints/kWh efficiency without reducing its 100-pint daily capacity.

This efficient refrigeration design lowers electrical demand and helps reduce the heat added to the conditioned space.

M-CoRR™ maintains dependable moisture removal across changing dew points, temperatures, and airflow conditions. Combined with the Quest 100’s compact footprint, variable-speed EC fan, and digital control system, it provides stable humidity management, lower operating costs, and flexible performance for cultivation, storage, processing, and commercial facilities.

How Does Quest's M-CoRR Technology Work?

Quest’s M-CoRR™ Technology advances refrigerant dehumidification through three coordinated coils: a pre-evaporator, primary evaporator, and recovery coil. Incoming air is pre-cooled before moisture is removed across the evaporator. The recovery coil then recaptures energy that would otherwise be lost and reuses it within the refrigeration process. Pre-cooling improves moisture extraction, while recovered heat prepares the dry air for discharge without relying on additional energy-intensive components.

This multi-coil sequence increases moisture removal per kilowatt-hour, supports consistent capacity across varying conditions, and reduces the electrical and heat burden placed on the surrounding environment while maintaining stable performance as room conditions and airflow requirements change.

Highlighted features of M-CoRR

High Efficiency.
Lower Energy Usage

The Quest 100 removes 7.5 pints per kilowatt-hour, reducing energy use while maintaining dependable 100-pint daily moisture removal.

Reduced Heat Output

Efficient energy recovery limits wasted electricity and reduces the heat introduced into the room, helping ease demand on supporting HVAC equipment.

Compact Size,
Flexible Placement

A 24-inch-long chassis and 60-pound weight support freestanding or overhead installation without occupying unnecessary operating space.

Quest 100 High-Efficiency Dehumidifier with M-CoRR™

The Quest 100 combines 100-pint daily moisture removal with a compact, corrosion-resistant design built for smaller commercial projects and controlled environments. Patented M-CoRR™ technology delivers 7.5-pints/kWh efficiency, while the variable-speed EC fan moves 280 CFM with a low five-amp electrical draw from a standard 110–120V supply. This combination preserves electrical capacity for lighting, climate controls, and other essential equipment operating on the facility panel.

Premium MERV-13 filtration helps capture dust, pollen, mold, bacteria, and other airborne contaminants without compromising dehumidification performance. The digital interface provides precise setpoints, self-diagnostics, Dark Mode, auto-restart, and an external-control option.

Its compact footprint, corrosion-resistant base, and freestanding or overhead installation options make the Quest 100 easy to position where space is limited. The unit operates from 56°F to 95°F and restores previous settings automatically after a power interruption. Precision control helps users match target humidity levels as moisture loads shift throughout daily operations and production cycles.

Engineered and assembled in Madison, Wisconsin, the Quest 100 is UL rated, ETL listed, and California Title 24 compliant for ducted and non-ducted installations. Its R454B refrigerant supports a more environmentally responsible platform while maintaining reliable commercial performance.

Installation Options For Quest 100

Freestanding dehumidifier

Hanging kit available

⚠️
Important Notice

Found a Quest unit cheaper somewhere else? Read this first.

Quest sets a minimum advertised price, so what you see here is the lowest any authorized dealer can publicly list. If another site shows a Quest unit for less, they are not authorized, even if they say they are, and that puts your warranty at risk. Quest can refuse service and support on an unauthorized purchase.

The good news: as an authorized Quest dealer, we'll beat any legitimate price, we just can't post it publicly. Call, text, or email and we'll get you the best price available, plus same-day commercial and bulk quotes.

🔍 Want the best legitimate Quest price?
Contact us directly. As an authorized Quest retailer, we may be able to offer better pricing by phone, text, or email — especially for bulk orders.
📧 info@greenthumbdepot.com 📞 (833) 416-0375

Customer Reviews


Trusted by authentic customer reviews from verified buyers worldwide.
If I could rate 6 stars I would!
If I could rate 6 stars I would! My representative Edouard B. has been shockingly responsive! Like - oh my god - an actual SERVICE oriented company. He's dug into my odd connectivity issues I've been having - and following up in an AMAZINGLY timey manner. No shit. You'll be impressed! (And the price was also unbeatable, quick shipping...it's all PERFECT). Thank you Ed!!
Jim D
Customer service was outstanding great…
Customer service was outstanding great people to deal with they understand your needs and they will do their best to fulfill them there is no way I can complain about them because they are the best help out there.Thanks green thumb depot. I’ll definitely order from them again
Glenn Appleton
The machine is doing just what my…
The machine is doing just what my salesman told it would do (I appreciate you Ed thank you) . The machine is what we need for our new business we’re starting up, soon to be llc and licensed. We are getting a lot of clients wanting our services. Ed I will be needing more of your products, thank you again.
Freddie
Fantastic
Great prices, fantastic customer service, and mind blowing shipping! Incredible. Will be using again and telling anyone in need.
Kar
←
→


Why Thousands of Growers Choose to Work Exclusively with Greenhouse with plants

Green Thumb Depot Logo

Them Green Thumb Depot Logo

icons-no Support
icons-no Nearly impossible to reach a real person. Endless chatbot loops, auto-replies, and unreturned emails.
icons-no Real humans. We answer quickly. Always here, always helpful
icons-no Order Processing
icons-no Orders often sit for days before being acknowledged. No clear confirmation, updates, or timelines.
icons-no Orders are processed immediately. You'll receive confirmation, tracking, and real-time updates within hours.
icons-no Shipping
icons-no Slow, vague, and unoptimized. Basic carriers, minimal tracking, and delayed delivery windows.
icons-no Fast, insured, and fully trackable shipping — optimized for speed and visibility every step of the way.
icons-no Pricing
icons-no Hidden fees, bait and switch tactics, post purchase price increases.
icons-no Our relationships guarantee the lowest prices. Transparent and fair. No surprises at checkout, and no shady tactics after the sale.
icons-no Returns & Warranty
icons-no Hidden fees, bait and switch tactics, post purchase price increases.
icons-no Clear, honest, and fast. Our return policy is built to protect your investment, not dodge responsibility.
icons-no Support
icons-no Frustrating automated responses
icons-no Fast, helpful and always supportive
icons-no Order Processing
icons-no Delays and lack of communication
icons-no Instant processing and updates
icons-no Shipping
icons-no Slow, unreliable and delayed service
icons-no Fast, insured, trackable shipping
icons-no Pricing
icons-no Deceptive pricing practices
icons-no Lowest prices, no surprises
icons-no Return & Warranty
icons-no Frustrating, misleading return policies
icons-no Clear, honest return policy

FAQ Section

How much moisture can the Quest 100 remove daily?
The Quest 100 removes 100 pints of moisture per day at 80°F and 60% relative humidity. At 75°F and 50% RH, it removes 70 pints per day, helping maintain stable conditions across changing commercial environments.
Where can the Quest 100 be installed?
The compact unit supports freestanding placement or overhead installation using an available hanging kit. Its corrosion-resistant base also makes it suitable for controlled environments where watering or washdown activities may expose nearby surfaces to moisture.
What functions are available through the digital controls?
The onboard interface provides precise humidity setpoints, self-diagnostics, Dark Mode to limit light pollution, auto-restart after power loss, and connection support for an optional external controller.
What type of air filtration does the Quest 100 use?
It uses a 12-inch by 14-inch by 1-inch MERV-13 filter. This filtration level captures more harmful airborne contaminants, including dust, pollen, mold, bacteria, and some virus-carrying particles.
What electrical connection does the Quest 100 require?
The unit operates on 110–120V, single-phase, 60 Hz power and includes a 10-foot NEMA 5-15P cord. Quest recommends a 15-amp breaker, and the unit draws 5.0 amps at rated conditions.
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 100 Specifications

@ 80° F / 60% RH
Water Removal 100 Pints/Day
Efficiency 7.5 Pints/kWh
Energy Factor 3.5 Liters/kWh
Current Draw 5.0 Amps
Power 540 Watts
BTU (Total) 6,800
BTU (Heat of Condensation) 4,800
BTU (Motor Load) 2,000
@ 75° F / 50% RH
Water Removal 70 Pints/Day
Efficiency 6.0 Pints/kWh
Energy Factor 2.8 Liters/kWh
Current Draw 4.4 Amps
Additional Specifications Quest 100
Part Number 4044590
Dehumidifier Type Refrigerant Dehumidifier
CFM 280
Operating Temperature 56°–95° F
Supply Voltage 110–120V, 1 Phase, 60 Hz
Unit Dimensions 24" L x 16" W x 14.5" H
Unit Weight 60 lb
Control Type Onboard Digital Controls with Low Voltage Terminal Block
Air Filter MERV Rating MERV 13
Air Filter Dimensions 12" x 14" x 1"
Recommended Breaker Size 15 Amps
Power Cord NEMA 5-15P (10')
Refrigerant Type R454B
Refrigerant Amount 1 lb 2 oz
Drain Port Connection 3/4" Threaded NPT
Fans Variable Speed EC Motor
Non-Ducted Energy Factor 6.1 Pints/kWh @ 65° F / 60% RH
Ducted Energy Factor 6.8 Pints/kWh @ 73° F / 60% RH
Warranty 5 Year Limited

Items in the box

Quest 100 Dehumidifier Unit

Power Cord

Drain Hose

User Manual

Warranty Information

Warranty Policy

Please Click Here to view our return and warranty policy

>