Quest 155 High-Efficiency Dehumidifier - 120V - R454B (SKU 4046120)

Quest 155 High-Efficiency Dehumidifier - 120V - R454B - QU6483

Quest

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Model

QU6483

199388

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Product Features

Removes up to 155 pints of moisture daily
Energy-efficient design lowers operating costs
Overhead installation saves valuable floor space
Captures dust, pollen, and mold particles.

Description

The Quest 155 is a high-efficiency overhead dehumidifier designed to control excess humidity in basements, grow rooms, crawl spaces, and other moisture-prone areas. With its compact, ceiling-mounted design, powerful 155-pint per day moisture removal capacity, and ability to be attached to a duct, it's ideal for maintaining a dry and healthy environment in both residential and commercial settings.

High Efficiency

The Quest 155 dehumidifier is perfect for small spaces in commercial or agricultural environments due to its high efficiency. Weighing 130 pounds and measuring 23.6 inches wide, this unit emphasizes efficiency and size. The new M-CoRR Technology is a patented multi-coil design that ensures the highest efficiencies available. Equipped with a 2-inch MERV-11 filter, one of the most efficient filters, the Quest 155 provides superior moisture control. Additionally, the use of the new refrigerant, R454B, makes the Quest 155 more environmentally friendly, further enhancing its standing as one of the best dehumidifiers on the market.

Versatile Applications

This high-efficiency dehumidifier adapts to any environment, providing excellent filtration and moisture removal in warehouses, offices, restaurants, and growing operations.

Hanging or Freestanding Installation: The unit can be installed as a freestanding dehumidifier with a corrosion-resistant base or suspended overhead if you don’t have floor space to spare.
Industry Usage: The Quest 155 is ideal for industries such as agriculture, distribution, food and beverage, manufacturing, science and technology, and sports.
Operation Range: The Quest 155 operates within a wide range of temperatures, from a minimum of 56°F to a maximum of 95°F.

Get Started Right Away

The Quest 155 features a plug-in design and comes with a 10 ft power cord, making it easy to start removing moisture immediately. Whether placed overhead or on the floor, the only requirement is a 110-120V outlet with a plug face type of 5-15P.

Bonus Features

Safety Certified: The Quest 155 is UL rated, ETL listed, and California Title 24 compliant for both ducted and non-ducted installations.
Advanced Control Panel: Take full command with a user-friendly manual digital display that offers accurate settings, built-in diagnostics, and a low light “Dark Mode” for discreet operation. It also includes a humidistat.
Automatic Defrost: The Quest 155 comes with an automatic defroster installed, ensuring reliable performance in various conditions.
Drain Hose: This dehumidifier comes with an 8-foot long drain hose for easy water removal.

Warranty

The Quest 155 is backed by a 5-year warranty, which includes a 1-year overall warranty and 4 years of parts coverage (condenser, evaporator, and compressor).

Product Specifications

More Information
Quest 155 High-Efficiency Dehumidifier - 120V - R454B (SKU 4046120)
Feature	Spec
SKU	QU6483
Weight (in lbs)	140.000000
Brand/Manufacturer	Quest
Additional Information	Auto-Restart
Additional Information	Number of Fan Speeds: 1
Additional Information	Energy Factor: 3.5 L/kWh
Additional Information	Safety Certified: UL rated, ETL listed
Heating BTU	7,100
Maximum CFM	391 CFM
Refrigerant	R454B
Capacity	155 pints
Wattage	920 W
Max Breaker Size	8 Amps
Height	21.75"
Width	20.25"
Depth	37.8"
Pint Capacity	151-199
Usage	Ducted, Indoor Growing/Greenhouses, Kennels/Stables, Repair Shops/Garages, Barn/Shed
Additional Info	Cabinet Width: 23.6"
Warranty	1-Year Parts and Labor \| 5-Year Sealed Refrigerant System
Resources	Catalog Specifications Sheet Owner's Manual You will need Adobe® Acrobat® Reader to view PDF documents.
Safety Information	PROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.

Reviews

Questions and Answers

Customer Questions

Who Makes Quest?

Quest dehumidifiers are proudly manufactured in the United States, specifically in Madison, Wisconsin. This is the home base of Therma-Stor LLC, the company behind the Quest brand. Therma-Stor has built a strong reputation in the HVAC and indoor air quality industries for producing high-performance, durable, and energy-efficient dehumidification systems.

Is installation difficult or do I need a professional?

While many Quest units are plug-and-play, larger models or those requiring overhead mounting may need a professional HVAC technician for safe and proper installation.

How do I know which Quest dehumidifier model is right for my space?

Start by measuring the square footage and ceiling height of your space. Then, consider moisture levels and how often the area is in use. Quest offers models with capacities ranging from around 70 to over 500 pints per day, so there’s an option for everything from small grow rooms to large industrial spaces.

What kind of maintenance is required?

Routine maintenance includes checking and replacing filters regularly, inspecting drainage lines, and cleaning the coils periodically. Most users find the upkeep simple and manageable.

How often do I need to clean or change the filter?

Most customers check the filter every 1–3 months. Depending on dust levels and usage, you may need to clean or replace it quarterly.

What is the warranty on Quest dehumidifiers?

Quest dehumidifiers come with a 5-year warranty on parts and refrigerant system components, offering long-term reliability and peace of mind.

How noisy are Quest dehumidifiers?

Noise levels vary by model, but most units are quiet enough for use in occupied commercial spaces. For grow rooms and workspaces, the sound is often comparable to a running HVAC system.

Can I run the dehumidifier continuously?

Yes, most Quest dehumidifiers are built for continuous operation. They include features like automatic defrost and humidity set points to maintain consistent performance without constant supervision.