Quest 100 Overhead Dehumidifier - 120V — Green Thumb Depot
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Quest 100 Overhead Dehumidifier - 120V

Quest 100 Overhead Dehumidifier - 120V

by Quest
SKU: 37216
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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.

Quest 100 Pint Overhead Dehumidifier

Elevate your indoor grow operation with the Quest Dehumidifier, the epitome of energy efficiency and productivity. This powerhouse removes more water per kWh at a wide temperature range, minimizing electricity use and lightening the HVAC heat load. Bid farewell to crop losses from molds and pests and embrace higher yields. Quest's innovative design tackles powdery mildew and botrytis issues, safeguarding your revenue. Their dehumidifiers offer flexible options for proper sizing, placement, and airflow control, ensuring an optimal environment for your indoor cultivation success.

Product Overview



What's Included?

Warranty Policy

Product Overview

Invest in success with Quest Dehumidifier for your indoor grow operation. Known for energy efficiency, it extracts more water per kWh across temperatures, minimizing electricity use. The innovative design imposes the lightest heat load on HVAC systems, ensuring substantial energy savings and a quick return on investment. Quest addresses threats like powdery mildew and bud rot, providing proper sizing, placement, and airflow control for optimal conditions. Whether in a greenhouse or hydroponic system, Quest offers flexible and customizable solutions for a thriving indoor cultivation environment.

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 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: Elevating Dehumidification Standards Traditional refrigerant dehumidifiers rely on a single evaporator coil to cool air and extract water, a process limited in efficiency. In contrast, Quest introduces a revolutionary paradigm with M-CoRR Technology, featuring three separate coils – the pre-evaporator, evaporator, and recovery coil. The pre-evaporator kickstarts the cooling process, the evaporator efficiently extracts water, while the recovery coil recycles energy, significantly enhancing overall dehumidification efficiency.

This innovative approach underscores Quest's commitment to pushing the boundaries of technology, providing users with superior moisture control and energy utilization in their 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 100 High-Efficiency Dehumidifier (with M-CoRR)?

The Quest 100 represents the pinnacle of dehumidification technology, seamlessly blending the latest advancements from Quest with the compact versatility the brand is known for. Specifically designed for small projects and spaces, this dehumidifier offers unparalleled performance and flexibility.

The Quest 100 features the groundbreaking M-CoRR technology, a patented multi-coil design that sets new standards for energy efficiency. This innovative system not only saves energy but also translates into cost savings. The unit's industry-leading coil system, coupled with premium MERV-13 filtration, ensures top-notch performance without compromising capacity or efficiency. The MERV-13 filtration goes above and beyond, providing 65% more effectiveness than MERV-8 and 20% more than MERV-11.

This superior filtration plays a crucial role in preventing the initiation or spread of bacteria, mold, and other contaminants in the environment.

Crafted with a corrosion-resistant base and a compact footprint, the Quest 100 offers flexible placement in wet environments. Precision-engineered in Wisconsin, USA, it reflects Quest's commitment to quality and comes with a reassuring 5-year warranty. Meeting California Title 24 requirements for ducted and non-ducted installations, it ensures compliance with energy efficiency regulations. The Quest 100 is a reliable solution for diverse dehumidification needs.

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 100 Specifications

@ 80° F / 60% RH
Water Removal 100 Pints/Day
Efficiency 7.5 Pints/kWh
Energy Factor 3.55 Liters/kWh
Current Draw 5.0 Amps
Power 540 Watts
BTU (Total) 6759
BTU (Heat) 4768
BTU (Motor Load) 1990
Additional Specifications Quest 100
Part Number 4041870
Dehumidifier Type Refrigerant Dehumidifier
CFM 280
Operating Temperature 56°-95° F
Supply Voltage 115 VAC
Unit Dimensions 24" L x 16" W x 14.5" H
Unit Weight 60 lb
Control Type Onboard w/ low voltage terminal block
Air Filter MERV Rating MERV 13
Air Filter Dimensions 12" x 14" x 1"
Rec. Breaker size 15
Power Cord 115VAC-Grounded (9′)
Refrigerant Type R410A
Refrigerant Amount 23 oz
Drain Port Connection 3/4" Threaded NPT
Fans Variable speed EC Motor
Warranty 5 Year

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