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Today's Hours 8am - 11pm estQuest 155 Commercial Overhead Dehumidifier, 155-Pint | 120V - R454B (SKU 4046120)
By
Quest
In stock
Model
QU6483
ID
199388
Was $3,667.00 Your Low Price Special Price $3,299.95
Product Features
- Capacity : 155 Pints/Day
- Airflow: 500 CFM
- Controls: Digital control interface with external control option
- Dimension: 26.8″ L x 23.6″ W x 20.9″ H
- Air Filter: MERV 13
- Application: Grow rooms, warehouses, basements, crawl spaces, storage facilities, greenhouses, and commercial workspaces
Quest 155 High-Efficiency Commercial Dehumidifier
The Quest 155 High-Efficiency Dehumidifier (Model 4046120) is a commercial-grade moisture control system designed for residential, industrial, and controlled-environment applications. It delivers strong dehumidification performance while maintaining high energy efficiency and operating on standard 110–120V power. With a capacity of up to 155 pints per day, this unit is engineered for medium to large spaces such as basements, warehouses, grow rooms, restoration sites, and other humidity-sensitive environments. It uses R454B refrigerant and Quest’s advanced M-CoRR multi-coil technology to maximize efficiency while reducing heat output and operating costs.
The Quest 155 is built for continuous-duty operation and supports flexible installation as either a standalone unit or ducted system component. Its integrated digital controls and high airflow design ensure consistent humidity management in demanding applications.
Key Features
- 155 PPD Moisture Removal Capacity: High-output dehumidification for medium to large environments.
- 110–120V Operation: Standard voltage compatibility for simplified installation.
- R454B Refrigerant System: Efficient refrigerant technology for improved environmental performance.
- M-CoRR Multi-Coil Technology: Enhances efficiency and reduces heat output during operation.
- High Airflow Design: Supports effective humidity control in larger spaces.
- Continuous Duty Operation: Built for 24/7 performance in demanding environments.
- Integrated Digital Controls: Allows precise humidity setpoint adjustment and monitoring.
Installation Options
Set up the Quest 155 wherever it works best for your space.
- Overhead: Hang the unit from the ceiling to keep your floor clear. Use the Quest overhead hanging bracket and secure it with chains.
- Floor: Set it on the ground for easy access to the onboard controls day to day.
- Ducted: Connect ductwork to the inlet and outlets to pull humid air from other rooms or send dry air where you need it.
Drain Water Anywhere
No floor drain nearby, or mounting the unit overhead? Add a condensate pump kit to move water up and out to a sink or drain line, so you never have to empty anything by hand.
Controller Options
The Quest 155 includes an onboard control panel for adjusting humidity settings and operating modes right at the unit. It also works with external controls like remote humidistats and condensate pump safety switches.
Mounting overhead or running more than one unit? The Quest DEH 3000R Digital Control lets you set and monitor humidity from a convenient spot, and it comes with a remote sensor so you're reading conditions where they actually matter.
Keep It Running Clean
A clean filter keeps dust off the coils and helps the unit run efficiently. Keep a spare MERV-13 replacement filter on hand so swaps are quick.
Warranty Information
The Quest 155 is backed by a dependable 5-Year Limited Warranty for long-term reliability and peace of mind. The warranty includes 1 year of coverage on parts and labor, along with extended coverage on the sealed refrigerant system components from years 2 through 5. Refer to official Quest documentation or an authorized dealer for complete warranty details.
Commercial-Grade Humidity Control with Industry-Leading Efficiency
At the heart of the Quest 155 is Quest’s patented M-CoRR® multi-coil refrigeration technology, which maximizes moisture removal while minimizing energy consumption. With an efficiency rating of up to 8.5 pints per kWh, the Quest 155 delivers industry-leading energy performance that helps reduce long-term operating costs while maintaining reliable humidity control. Designed for installation flexibility, the Quest 155 can operate as either a freestanding unit or an overhead-mounted system using its integrated lift-and-hang points. Its compact footprint—approximately 20% smaller than previous Quest Dual 155 models—allows it to fit into tighter spaces while maximizing usable floor area. Indoor air quality is another major advantage of the Quest 155. The system includes premium MERV-13 filtration, helping remove airborne contaminants such as dust, pollen, mold spores, bacteria, and other particulates before recirculating air throughout the space. This makes the unit ideal for environments where both humidity control and cleaner air are important.
Why Choose Quest 155 High Efficiency Dehumidifier
- Helps Prevent Mold & Moisture Damage: Maintains optimal humidity levels to protect structures, inventory, and equipment.
- Energy-Efficient Performance: Industry-leading efficiency helps reduce long-term electricity costs.
- Improved Indoor Air Quality: MERV-13 filtration helps remove airborne contaminants for cleaner indoor environments.
- Ideal for Commercial Applications: Designed for grow rooms, warehouses, greenhouses, basements, and industrial spaces.
- Flexible Space-Saving Installation: Overhead mounting capability helps maximize usable floor space.
- Easy Plug-and-Play Setup: Operates on a standard 120V outlet for simplified installation.
- Built for Continuous Professional Use: Durable corrosion-resistant construction supports long-term reliability.
- Trusted Quest Engineering: Known for dependable humidity control, efficiency, and long service life in demanding environments.
Top reviews
- Quest 100Using in unfinished basement on floor. The shipping pallet is useful as a stand and the screw in legs allow to slant the unit to aid drainage. It is quiet and its smaller size and weight are huge positives relative to alternatives. Quickly and efficiently reduced humidity to desired level. So far so good.
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