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Quest 155 Overhead 155 Pint Dehumidifier - 120V
Quest 155 Overhead 155 Pint Dehumidifier - 120V

Quest 155 Overhead 155 Pint Dehumidifier - 120V

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SKU: 4046120

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The Quest 155 Overhead Dehumidifier - 120V stands out as a versatile and efficient solution for managing humidity in medium-sized spaces. This robust unit, designed to operate on a standard 120V power supply, excels in removing up to 155 pints of moisture per day, making it highly effective for environments like medium-sized grow rooms, offices, or storage areas. Its overhead installation design is a significant space-saver, allowing for unobtrusive placement while maintaining maximum dehumidifying efficiency. The Quest 155 is known for its energy efficiency, reducing operating costs without compromising on performance. With its durable construction, easy-to-use interface, and reliable performance, the Quest 155 Overhead Dehumidifier is an excellent choice for those seeking to maintain optimal humidity levels and protect their spaces from the adverse effects of excess moisture.
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Quest 155 Overhead 155 Pint Dehumidifier - 120V
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Quest 155 Overhead 155 Pint Dehumidifier - 120V

Improve humidity control with the Quest 155, a compact high-efficiency dehumidifier delivering 155 pints per day at 8.3 pints/kWh. Redesigned 20% smaller than its predecessor, it plugs into a standard 120V outlet and includes onboard digital controls, self-diagnostics, auto restart, MERV 13 filtration, integrated hanging points, and a removable service panel. Engineered and assembled in Madison, Wisconsin, it supports efficient overhead or ground installation across demanding commercial environments.

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Warranty Policy

Product Overview

The redesigned Quest 155 delivers dependable moisture control from a footprint 20% smaller than its predecessor. It connects to a standard 120V outlet and combines onboard digital controls, self-diagnostics, auto restart, integrated hanging points, and accessible maintenance. Freestanding or overhead placement helps facilities protect valuable space while maintaining precise, energy-efficient humidity management.

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

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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 design recycles energy throughout the refrigeration process, helping the Quest 155 remove more moisture while consuming less power. This advanced approach supports excellent efficiency, reduced heat output, and dependable performance across demanding operating environments.

M-CoRR technology enables the Quest 155 to deliver 155 pints per day at 8.3 pints/kWh, lowering utility demand and supporting a strong long-term return on investment.

The multi-coil system is designed to perform across a broad range of temperature and humidity conditions while using recovered energy to improve moisture removal. For facility operators, this means efficient dehumidification, less unnecessary heat added to the space, and lower operating costs throughout the equipment's service life.

How Does Quest's M-CoRR Technology Work?

Quest's M-CoRR Technology: Efficient Moisture Removal Quest's patented multi-coil refrigeration system uses a pre-evaporator, evaporator, and recovery coil to improve moisture extraction. The pre-evaporator begins cooling incoming air, the evaporator removes water, and the recovery coil recycles energy that would otherwise be lost, helping the system operate more efficiently across changing environmental conditions.

This process allows the Quest 155 to remove more water with less energy, reduce unnecessary heat output, and maintain reliable humidity control within a compact commercial dehumidifier.

Highlighted features of M-CoRR

High Efficiency.
Lower Operating Costs

Rated at 8.3 pints per kilowatt-hour, the Quest 155 removes substantial moisture while reducing electricity demand and supporting lower long-term operating expenses.

Reduced Heat Output

Efficient M-CoRR operation limits wasted energy that would otherwise become added heat. This reduces the burden placed on cooling equipment while helping facilities maintain more stable environmental conditions throughout continuous dehumidification.

Compact Design,
Flexible Placement

The redesigned Quest 155 is 20% smaller than its predecessor and includes integrated hanging points for straightforward overhead installation or convenient freestanding placement.

Quest 155 High-Efficiency Dehumidifier

The redesigned Quest 155 removes 155 pints of moisture per day at 80°F and 60% relative humidity while delivering 8.3 pints/kWh efficiency. Its compact cabinet is 20% smaller than the previous Dual 155 and plugs into a standard 110-120V outlet. Onboard digital controls provide precise humidity management, an optional external control connection, self-diagnostics, and easy operation across commercial applications.

Integrated hanging points support overhead installation without a separate hanging kit, while the removable access panel simplifies maintenance even when suspended. The unit also includes MERV 13 filtration, auto restart, a long power cord, and flexible ground or overhead placement. Engineered and assembled in Madison, Wisconsin, it meets California Title 24 requirements for ducted and non-ducted installations.

Installation Options For 208/230V

Freestanding

Overhead

P-Trap Requirements

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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
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FAQ Section

What is the Quest 155's moisture-removal capacity?
The Quest 155 removes 155 pints of water per day at 80°F and 60% relative humidity. At those conditions, it delivers an efficiency rating of 8.3 pints per kilowatt-hour.
Can the Quest 155 be installed overhead?
Yes. Integrated hanging points allow straightforward overhead installation without requiring a separate hanging kit. It may also be placed on the ground, depending on the facility layout and airflow requirements.
What functions are available through the digital controls?
The onboard digital interface supports precise humidity management, self-diagnostics, and an external control option through the low-voltage terminal block for compatible facility-control configurations.
How does the Quest 155 handle power interruptions?
The auto-restart function restores the unit to its previous settings after a power outage, helping maintain continuous humidity control without requiring the operator to manually reconfigure the system.
What electrical connection does the Quest 155 require?
The unit operates on 110-120 VAC, single-phase, 60 Hz power and uses a nine-foot 14/3 SJTW cord with a standard NEMA 5-15P plug.
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 155 Specifications

@ 80° F/60% RH
Water Removal 155 Pints/Day
Efficiency 8.3 Pints/kWh
Energy Factor 4.0 Liters/kWh
Current Draw 6.9 Amps
Power 750 Watts
BTU - Total 9,700
BTU - Heat of Condensation 7,100
BTU - Motor Load 2,600
@ 75° F/60% RH
Water Removal 90 Pints/Day
Efficiency 5.6 Pints/kWh
Energy Factor 2.6 Liters/kWh
Current Draw 5.7 Amps
Additional Specifications Quest 155
Part Number 4046120
Dehumidifier Type Refrigerant Dehumidifier
CFM 500
Operating Temperature 56° F Min-95° F Max
Supply Voltage 110-120 VAC, 1 Phase, 60 Hz
Unit Dimensions 26.8" L x 23.6" W x 20.9" H
Unit Weight 130 lb
Control Type Digital Onboard Controls with Low Voltage Terminal Block
Air Filter MERV Rating MERV 13
Air Filter Dimensions 18" x 18" x 2"
Power Cord / Plug 14/3 SJTW (9') / NEMA 5-15P
Refrigerant Type R454B
Refrigerant Amount 3 lb 0 oz
Drain Port Connection 3/4" Threaded NPT
Non-Ducted Energy Factor 6.0 Pints/kWh @ 65° F/60% RH
Ducted Energy Factor 7.3 Pints/kWh @ 73° F/50% RH
Warranty 5 Year Limited

Items in the box

Quest 155 Dehumidifier Unit

9-Foot Power Cord

3/4" NPT Drain Port

MERV 13 Air Filter

Digital Control Interface

Warranty Policy

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