Quest Dehumidifiers

HIGHER YIELDS, FEWER PROBLEMS

The right dehumidification setup can take your indoor grow operation to the next level. Say goodbye to crop losses from molds and other pests, and say hello to peak productivity with the Quest Dehumidifier.

Quest has the most energy-efficient dehumidifiers available, using the least electricity and removing more pints of water per kWh at the widest temperature range. Quest’s innovative design also creates the lightest heat load on your HVAC, paying for itself in energy savings.

Higher Crop Yields, Less Problems

One of the biggest challenges for the indoor farming industry is creating and maintaining a stable, consistent environment for plants to flourish. Without a reliable climate, you could lose your entire crop. Once you lose control of your environment, serious crop-crushing issues begin to take hold. The two main “crop-crushers” are concerns many growers face at one time or another: powdery mildew and botrytis, more commonly known as bud rot. Either of these issues can destroy a grow and lead to lost revenue.

Proper Dehumidification Can Make All The Difference

Whether it’s a greenhouse or a hydroponic grow the same principles come into play when you’re fine-tuning a setup. For moisture control and dehumidification, the three most important aspects are proper sizing, placement, and airflow. Quest engineers developed our product offerings to allow for flexible and customizable options to address all three.

Why use a Quest Dehumidifier?

• The most energy-efficient dehumidifiers on the market
• High capacity, high quality dehumidifiers with superior air filtration
• The most complete humidity control product line
• Superior U.S. technical support and service
• A full warranty on every Quest product
• Patented technology developed in Madison, Wisconsin

QUEST'S PATENTED TECHNOLOGY | M-CoRR™

Providing the most energy-efficeint dehumidification

The secret behind Quest’s unparalleled energy-efficiency is our patented multi-coil design, or as we like to call it: M-CoRR (short for Multi-Coil Refrigeration Recovery). You won’t find this technology anywhere else.

M-CoRR is engineered for maximum performance, allowing Quest to be the most energy-efficient and the best return on your investment, paying for itself in energy savings over time. M-CoRR’s innovative design performs better over a wider range of dew points, even at colder temperatures, and maintains capacity regardless of airflow fluctuations.

How Does Quest's M-CoRR Technology Work?

Traditional refrigerant dehumidifiers have a single refrigerant-filled evaporator coil that cools the air passing through it to extract the water from the air (because cold air holds less water). Once the air is cooled below the dew point, water condenses. Energy captured in the refrigerant during water removal is returned to the air in the form of heat at the second coil, the condenser.

The magic of Quest’s M-CoRR Technology is its multiple coils. Quest designed the typical evaporator coil into three separate refrigerant-filled coils: the pre-evaporator, evaporator, and recovery coil.

The first coil, the pre-evaporator, cools the air. The second coil, the evaporator, cools it even further to pull out the water. The third coil recovers the energy from pre-cooling the air to be recycled back into the evaporator for reuse.

What Are The Benefits Of Using 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.

Wide Operating Rage. Tighter Control

Thanks to its multiple coils, M-CoRR technology equips Quest to maintain performance better than traditional dehumidification equipment, even in cooler temperatures and dew points, with less frequent and faster defrost cycles. Less time spent in defrost neutralizes spikes in temperature and relative humidity, keeping the environment consistent and, in indoor cultivations, VPD dialed in.

Which Quest Dehumidifiers feature M-CoRR?

The Quest Dehumidifiers are broken apart by the High-Efficiency Series and the Standard Overhead Series. All Quest Dehumidifiser in the High-Efficiency Series feature the M-CoRR Technology. The Overhead Series are Quest's standar units that do not feature M-CoRR. Please note: Models in the high-efficiency series can still be installed overhead if that models allows.

Click the Quest models in the list below to be taken to detailed specifications for that model.

Quest Dehumidifier 70 - Overhead Series

Controlling humidity in compact, unconditioned commercial spaces presents unique challenges. Variable temperatures and constrained placement means you need a targeted solution. That’s where the Quest 70 comes in.

This compact, economical, high performing dehumidifier has one of the widest temperature and relative humidity operating ranges we offer.

The Quest 70 dehumidifier is engineered in Madison, Wisconsin. It’s backed by a 5-year warranty. In addition, this unit meets California Title 24 requirements for both ducted (whole-home) and non-ducted (portable) installations.

Quest 70 Specifications

@ 80° F / 60% RH

Water Removal 70 Pints/Day	Efficiency 5 Pints/kWh	Energy Factor 2.4 Liters/kWh	Current Draw 5.1 Amps
Power 680 Watts	BTU (Total) 5,000	BTU (Heat) 3,000	BTU (Motor Load) 2,000

@ 75° F / 50% RH

Water Removal 43 Pints/Day

Efficiency 3.3 Pints/kWh

Energy Factor 1.6 Liters/kWh

Current Draw 4.9 Amps

Additional Specifications Quest 70

Quest 100 High-Efficiency Dehumidifier (with M-CoRR)

The NEW Quest 100 combines Quest’s latest technology with with the versatility and flexibility of its compact product line. This makes it the perfect dehumidifier for small projects and spaces.

M-CoRR Technology

The new Quest 100 pint dehumidifier boasts our unique M-CoRR technology. This patented multi-coil design provides the highest efficiencies available on the market, saving energy and dollars.

In addition to our industry-leading coil system, the Quest 100 features premium MERV-13 filtration, without compromising capacity or efficiency. This superior filtration helps to prevent the start or spread of bacteria, mold or other contaminants around your precious plants, equipment and crew with 65% more effectiveness than MERV-8 and 20% more effectiveness than MERV-11. MERV-13 filtration means healthier air and more control over your environment.

With a corrosion-resistant base and smaller footprint, the Quest 100 has flexible placement options, without the worry of rust, even after watering your plants or washing down your room.

The Quest 100 dehumidifier is engineered and assembled with quality in Madison, Wisconsin, USA. It’s backed by a 5-year warranty, providing you with confidence in your purchase. Wondering about energy efficiency regulations? No worries. This unit meets the California Title 24 requirements for both ducted (whole-home) and non-ducted (portable) installations.

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

Quest Dehumidifier 105 - Overhead Series

The Quest Dual 105 is the most energy efficient dehumidifier in its class: Using only 4.9 amps, the Quest Dual 105 removes 105 pints of water per day. It gives you the flexibility to hang the unit overhead or use ductwork and keep the dehumidifier in a different space entirely.

The Quest Dual 105 dehumidifier is engineered and assembled in Madison, Wisconsin and is backed by a 5-year warranty. In addition, this unit meets California Title 24 requirements for both ducted (whole-home) and non-ducted (portable) installations.

Quest 105 Specifications

@ 80° F/60% RH

Water Removal 105 Pints/Day	Efficiency 8.8 Pints/kWh	Energy Factor 4.2 Liters/kWh	Current Draw 4.9 Amps
Power 530 Watts	BTU (Total) 6,600	BTU (Heat) 5,000	BTU (Motor Load) 1,600

@ 75° F/50% RH

Water Removal 74 Pints/Day

Efficiency 7.2 Pints/kWh

Energy Factor 3.4 Liters/kWh

Current Draw 3.7 Amps

Additional Specifications for Quest 105

Quest Dehumidifier 110 - Overhead Series

The Quest Dual 110 dehumidifier is our smallest and lightest mid-size dehumidifier. It offers great water removal with easy portability — you can even hang it overhead — at an affordable price.

The Quest Dual 110 removes more water using less electricity, and will last years longer than the competition.

The Dual 110 is engineered and assembled in Madison, Wisconsin using the very best components and materials available. It’s backed by a 5-year warranty. In addition, this unit meets California Title 24 requirements for ducted (whole-home) installations.

Quest 110 Specifications

@ 80° F/60% RH

Water Removal 110 Pints/Day	Efficiency 5.8 Pints/kWh	Energy Factor 2.8 Liters/kWh	Current Draw 7.4 Amps
Power 787 Watts	BTU (Total) 7,900	BTU (Heat) 5,100	BTU (Motor Load) 2,800

Additional Specifications for Quest 110

Quest Dehumidifier 150 - Overhead Series

The Quest Dual 150 removes almost 20 gallons a day and is is our most powerful mid-sized overhead type dehumidifier. Dollar per pint, the this unit is the most affordable professional-quality dehumidifier on the market today.

The Dual 150 is engineered and assembled in Madison, Wisconsin using the very best components and materials available.

The Quest Dual 150 dehumidifier is backed by a 5-year warranty. In addition, this unit meets California Title 24 requirements for both ducted (whole-home) installation.

Quest 150 Specifications

@ 80° F/60% RH

Water Removal 150 Pints/Day	Efficiency 4.8 Pints/kWh	Energy Factor 2.3 Liters/kWh	Current Draw 11.0 Amps
Power 1,300 Watts	BTU (Total) 10,500	BTU (Heat) 6,700	BTU (Motor Load) 3,800

Additional Specifications for Quest 150

Quest Dehumidifier 155 - Overhead Series

The Quest Dual 155 dehumidifier is one of the most energy-efficient commercial dehumidifiers on the market today. Removing 155 pints of water per day, this unit can save you thousands in energy costs every year compared to the competition. It gives you the flexibility to hang the unit overhead or use ductwork and keep the dehumidifier in a different space entirely.

The Quest Dual 155 dehumidifier is engineered and assembled in Madison, Wisconsin. It’s backed by a 5-year warranty. In addition, this unit meets California Title 24 requirements for both ducted (whole-home) and non-ducted (portable) installations.

Quest 155 Specifications

@ 80° F/60% RH

Water Removal 155 Pints/Day	Efficiency 7.3 Pints/kWh	Energy Factor 3.5 Liters/kWh	Current Draw 8 Amps
Power 920 Watts	BTU (Total) 10,500	BTU (Heat) 7,600	BTU (Motor Load) 2,900

@ 75° F/50% RH

Water Removal 116 Pints/Day

Efficiency 6.1 Pints/kWh

Energy Factor 2.9 Liters/kWh

Current Draw 7.1 Amps

Additional Specifications for Quest 155

Quest Dehumidifier 165 - Overhead Series

At only 3.6 amps, the Quest Dual 165 dehumidifier is one of the most energy-efficient commercial dehumidifiers on the market today. Removing 165 pints of water per day, this unit saves thousands in energy costs every year compared to the competition.Designed with the flexibility to hang overhead or ducted.

The Quest Dual 165 dehumidifier is engineered and assembled in Madison, Wisconsin. It’s backed by a 5-year warranty. In addition, this unit meets California Title 24 requirements for both ducted (whole-home) and non-ducted (portable) installations.

Quest 165 Specifications

@ 80° F/60% RH

Water Removal 165 Pints/Day	Efficiency 7.8 Pints/kWh	Energy Factor 3.7 Liters/kWh	Current Draw 3.6 Amps
Power 860 Watts	BTU (Total) 9,900	BTU (Heat) 7,100	BTU (Motor Load) 2,800

@ 75° F/50% RH

Water Removal 112 Pints/Day

Efficiency 6.3 Pints/kWh

Energy Factor 3.0 Liters/kWh

Current Draw 3.1 Amps

Additional Specifications for Quest 165

Quest Dehumidifier 205 - Overhead Series

The Quest Dual 205 is our highest capacity 115V dehumidifier.Using 13.2 amps, the Dual 205 removes 205 pints of water per day while running 46% more efficiently than Energy Star standards. It gives you the flexibility to hang the unit overhead or use ductwork and keep the dehumidifier in a different space entirely.

Like all Quest products, the Dual 205 is Assembled in Madison, Wisconsin using the very best components and materials available.

Quest 205 Specifications

@ 80° F/60% RH

Water Removal 205 Pints/Day	Efficiency 5.7 Pints/kWh	Energy Factor 2.7 Liters/kWh	Current Draw 13.2 Amps
Power 1,525 Watts	BTU (Total) 14,300	BTU (Heat) 9,200	BTU (Motor Load) 5,100

@ 75° F/50% RH

Water Removal 128 Pints/Day

Efficiency 3.9 Pints/kWh

Energy Factor 1.8 Liters/kWh

Current Draw 11.8 Amps

Additional Specifications for Quest 205

Quest 225 High-Efficiency Dehumidifier (with M-CoRR)

The Dual 225 dehumidifier was built to answer the voltage concerns of commercial users. Almost as efficient as our Dual 155 model, the Quest Dual 225 is a favorite among those who choose the higher voltage route.

The Dual 225 is engineered and assembled in Madison, Wisconsin using the very best components and materials available.

M-CoRR Technology

New Quest 225 units boast our unique patented M-CoRR technology. This multi-coil refrigeration design recycles excess heat to provide the highest efficiencies available on the market, reducing heat (BTUs) output into your space..

In addition to industry-leading MERV-13 filtration, the 225 features Quest’s filter compensation technology. Filter compensation technology which increases fan speed as the filter becomes increasingly clogged with pollen, powdery mildew and dirt. This speed adjustment allows for the same amount of air to pass through the filter without reducing the cubic feet for minute (CFM). As a result, the Quest 225 is able to work consistently and constantly to optimize your grow room environment with maximum energy efficiency and consistency.

Quest 225 Specifications

@ 80° F/60% RH

Water Removal 225 Pints/Day	Efficiency 6.1 Pints/kWh	Energy Factor 2.9 Liters/kWh	Current Draw 6.9 Amps
Power 1,500 Watts	BTU (Total) 15,500	BTU (Heat) 10,300	BTU (Motor Load) 5,200

@ 75° F/50% RH

Water Removal 143 Pints/Day

Efficiency 4.4 Pints/kWh

Energy Factor 2.1 Liters/kWh

Current Draw 6.3 Amps

Additional Specifications for Quest 225

Quest 335 High-Efficiency Dehumidifier (with M-CoRR)

The Quest 335 dehumidifier is engineered specifically for commercial cannabis growers facing the heavy workload of cultivations filled with moisture-producing crops. At the core of Quest’s 335 features filter compensation, M-CoRR technology and digital controls with the versatility to work with external controls.

The Quest 335 uses a multi-coil design similar to the one used in the Quest 506. The end result is 350 pints of water pulled from the air every 24 hours at 80F and 60% relative humidity at 9.3 KWh.

When you combine the dollars associated with energy consumption, reduced air conditioning usage, and the consistent environment the filter compensation feature provides, the 335 is one of the most cost-effective units on the market.

M-CoRR Technology

Both Quest 335 units (208/230V and 277V) boast our unique patented M-CoRR technology. This multi-coil refrigeration design recycles excess heat to provide the highest efficiencies available on the market, reducing heat (BTUs) output into your space..

In addition to industry-leading MERV-13 filtration, the 335 features Quest’s filter compensation technology. Filter compensation technology which increases fan speed as the filter becomes increasingly clogged with pollen, powdery mildew and dirt. This speed adjustment allows for the same amount of air to pass through the filter without reducing the cubic feet for minute (CFM). As a result, the Quest 335 is able to work consistently and constantly to optimize your grow room environment with maximum energy efficiency and consistency.

Quest 335 Specifications

@ 80° F/60% RH

Water Removal 350 Pints/Day	Efficiency 9.3 Pints/kWh	Energy Factor 4.3 Liters/kWh	Current Draw 9A @208V / 7.5A @230V
Power 1,565 Watts	BTU (Total) 20,300	BTU (Heat) 15,200	BTU (Motor Load) 5,100

@ 75° F/50% RH

Water Removal 233 Pints/Day

Efficiency 6.7 Pints/kWh

Energy Factor 3.2 Liters/kWh

Additional Specifications for Quest 335

Quest 335 - 277 Volt High-Efficiency Dehumidifier (with M-CoRR)

The Quest 335 277V dehumidifier offer the same quality and features as our original Quest 335 208/230V units, but instead offer 277V voltages for use in industrial facilities. The 277V unit is a great fit for grow rooms, many of which traditionally have 277V outlets already installed for lighting. Additionally, these higher voltage units use less amperage, freeing up electricity for other equipment in the grow room.

M-CoRR Technology

Both Quest 335 units (208/230V and 277V) boast our unique patented M-CoRR technology. This multi-coil refrigeration design recycles excess heat to provide the highest efficiencies available on the market, while reducing heat (BTUs) output into your space.

In addition to industry-leading MERV-13 filtration, the 335 features Quest’s filter compensation technology. Filter compensation technology increases fan speed as the filter becomes increasingly clogged with pollen, powdery mildew and dirt. This speed adjustment allows for the same amount of air to pass through the filter without reducing the cubic feet for minute (CFM). As a result, the Quest 335 is able to work consistently and constantly to optimize your grow room environment with maximum energy efficiency and consistency.

Quest 335 277 Volt Specifications

@ 80° F/60% RH

Water Removal 350 Pints/Day	Efficiency 8.5 Pints/kWh	Energy Factor 4 Liters/kWh	Current Draw 6.8 Amps
Power 1,789 Watts	BTU (Total) 21,900	BTU (Heat) 15,900	BTU (Motor Load) 6,000

@ 75° F/50% RH

Water Removal 230 Pints/Day

Efficiency 6.2 Pints/kWh

Energy Factor 2.9 Liters/kWh

Current Draw 6 Amps

Additional Specifications for Quest 335 277 Volt

Quest 506 High-Efficiency Dehumidifier (with M-CoRR)

Powerful and efficient, the Quest 506 is the industry’s first 500-pint dehumidifier and is perfect for agricultural applications as well as tough commercial spaces. Its 506 pint capacity makes it one of the most powerful commercial dehumidifiers on the market.

M-CoRR Technology

The Quest 506 utilizes our unique patented M-CoRR technology. This multi-coil refrigeration design recycles excess heat to provide the highest efficiencies available on the market, while reducing heat (BTUs) output into your space.

Commonly used in indoor growing facilities, greenhouses, warehouses and other large industrial areas, the 506 dehumidifier is available for a variety of uses and installations. This Quest dehumidifier can be hung or placed on the floor, and offers an impressive MERV 13 filtration system.

Quest 506 Specifications

@ 80° F/60% RH

Water Removal 506 Pints/Day	Efficiency 8.1 Pints/kWh	Energy Factor 3.8 Liters/kWh	Current Draw 11 Amps
Power 2,700 Watts	BTU (Total) 31,000	BTU (Heat) 22,500	BTU (Motor Load) 8,500

@ 75° F/50% RH

Water Removal 349 Pints/Day

Efficiency 6.2 Pints/kWh

Energy Factor 2.9 Liters/kWh

Current Draw 10.2 Amps

Additional Specifications for Quest 506

Quest 506 - 277 Volt High-Efficiency Dehumidifier (with M-CoRR)

Powerful and efficient, the Quest 506 277V dehumidifier is a high-capacity, high-efficiency unit which features out patented technology.

M-CoRR Technology

The Quest 506 277V boasts our unique patented M-CoRR technology. This multi-coil refrigeration design recycles excess heat to provide the highest efficiencies available on the market, while reducing heat (BTUs) output into your space.

Just like our original 506 230V units, the 506 pint capacity makes it one of the most powerful commercial dehumidifiers on the market.

The 277V voltage provides low amp draw, freeing up electricity for other equipment. Best of all these units can be installed on 277V without the additional installation of buck-boost transformers and the associated costs of wiring.

Quest 506 277 Volt Specifications

@ 80° F/60% RH

Water Removal 506 Pints/Day	Efficiency 8.1 Pints/kWh	Energy Factor 3.8 Liters/kWh	Current Draw 10 Amps
Power 2,700 Watts	BTU (Total) 31,900	BTU (Heat) 23,000	BTU (Motor Load) 8,900

@ 75° F/50% RH

Water Removal 349 Pints/Day

Efficiency 6.2 Pints/kWh

Energy Factor 2.9 Liters/kWh

Current Draw 10.2 Amps

Additional Specifications for Quest 506 277 Volt

Quest 746 High-Efficiency Dehumidifier (with M-CoRR)

The Quest 746 480V dehumidifier features our patented M-CoRRTM technology. This multi-coil design reuses refrigeration allowing Quest to provide industry leading efficiencies. It frees up electricity while using less amperage at a higher voltage.

M-CoRR Technology

The Quest 746 dehumidifier boasts our unique patented M-CoRR technology. This multi-coil refrigeration design recycles excess heat to provide the highest efficiencies available on the market, while reducing heat (BTUs) output into your space.

The Quest 746 480V dehumidifier is engineered and assembled in Madison, Wisconsin. It’s backed by a 5-year warranty. In addition, this unit meets California Title 24 requirements for both ducted (whole-home) and non-ducted (portable) installations.

Quest 746 Specifications

@ 80° F/60% RH

Water Removal 746 Pints/Day	Efficiency 7.3 Pints/kWh	Energy Factor 3.5 Liters/kWh	Current Draw 6.5 Amps
Power 4,266 Watts	BTU (Total) 48,400	BTU (Heat) 33,900	BTU (Motor Load) 14,500

@ 75° F/50% RH

Water Removal 530 Pints/Day

Efficiency 5 Pints/kWh

Energy Factor 2.4 Liters/kWh

Current Draw 6.25 Amps

Additional Specifications for Quest 746

Quest 876 High-Efficiency Dehumidifier (with M-CoRR)

Powered by patented coil technology that isn’t available anywhere else, the Quest 876 dehumidifier is designed to work round-the-clock with maximum energy efficiency and flexibility. Featuring integrated handles and hang points, this powerhouse machine can be suspended overhead, freeing up valuable floor space.

M-CoRR Technology

The Quest 876 dehumidifier boasts our unique patented M-CoRR technology. This multi-coil refrigeration design recycles excess heat to provide the highest efficiencies available on the market, while reducing heat (BTUs) output into your space.

The Quest 876 is engineered and assembled in Madison, Wisconsin, USA. It’s backed by a 5-year warranty providing confidence in your purchase. In addition, this unit meets California Title 24 requirements for ducted (whole-home) installation.

Quest 876 Specifications

@ 80° F/60% RH

Water Removal 876 Pints/Day	Efficiency 6.6 Pints/kWh	Energy Factor 3.1 Liters/kWh	Current Draw 24.7 Amps
Power 5,500 Watts	BTU (Total) 58,200	BTU (Heat) 39,600	BTU (Motor Load) 18,600

@ 75° F/50% RH

Water Removal 614 Pints/Day

Efficiency 5.2 Pints/kWh

Energy Factor 2.5 Liters/kWh

Current Draw 22.4 Amps

Additional Specifications for Quest 876