Quest 225 Commercial Overhead Dehumidifier, 225-Pint | 208/230V | R454B

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Quest

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Model

QU14856

ID

199390

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Product Features
  • Capacity : 225 Pints/Day
  • Airflow: 630 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 facilities, warehouses, greenhouses, basements, mechanical rooms, manufacturing areas, storage facilities, or restoration projects

OVERVIEW

The Quest 225 High-Efficiency Dehumidifier (Model 4046100) is a commercial-grade, high-performance moisture control system designed for large residential, industrial, and controlled-environment applications. It delivers strong dehumidification capacity while maintaining high energy efficiency on 208/230V electrical service.With a capacity of up to 225 pints per day, this unit is engineered for demanding environments such as warehouses, indoor agriculture, restoration projects, and other large enclosed spaces requiring consistent humidity control. It uses R454B refrigerant and Quest’s high-efficiency multi-coil system to maximize moisture removal while minimizing energy consumption and heat output.

The Quest 225 is designed for continuous operation and supports ducted or standalone installation. Its integrated controls and high airflow performance allow for stable humidity regulation across large areas, making it a widely used solution for professional-grade dehumidification applications.

Key Features

  • 225 PPD Moisture Removal Capacity: High-output dehumidification for large commercial and industrial spaces.
  • 208/230V Operation: Flexible voltage compatibility for professional installations.
  • R454B Refrigerant System: Modern refrigerant designed for efficient and environmentally improved performance.
  • M-CoRR Multi-Coil Technology: Enhances efficiency and reduces heat output during operation.
  • High Airflow Design: Supports effective humidity control in large-volume spaces.
  • Continuous Duty Operation: Built for 24/7 use in demanding environments.
  • Integrated Digital Controls: Allows precise humidity setpoint management and monitoring.

Control Options

The Quest 225 High-Efficiency Dehumidifier features simple and convenient control options for efficient moisture management. It includes an integrated onboard control interface for easy adjustment of humidity settings and operating modes. The unit is also compatible with external control devices such as remote humidistats and condensate pump safety switches for added installation flexibility.

Warranty information

The Quest 225 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.


High-Capacity Moisture Control for Demanding Environments

The Quest 225 High Efficiency Dehumidifier is a premium commercial-grade dehumidification system engineered for powerful moisture removal, exceptional energy efficiency, and reliable environmental control in demanding applications. At the core of the Quest 225 is Quest’s patented M-CoRR® multi-coil refrigeration technology, engineered to maximize moisture removal while minimizing energy consumption. With efficiency ratings reaching up to 8.9 pints per kWh, the Quest 225 delivers industry-leading performance that helps significantly reduce electricity usage compared to conventional dehumidifiers. Indoor air quality is another major advantage of the Quest 225. The system includes premium MERV-13 filtration, which helps capture airborne contaminants such as dust, pollen, mold spores, and other particulates before recirculating air throughout the environment. For simplified operation and maintenance, the Quest 225 includes onboard digital controls with self-diagnostics, auto restart functionality, integrated humidistat compatibility, and easy-access service panels. Designed and assembled in the USA, the Quest 225 is built for long-term durability and dependable commercial performance.


Why Choose Quest 225 High Efficiency Dehumidifier

  • Helps Prevent Mold & Moisture Damage: Controls excess humidity to protect structures, inventory, and equipment.
  • Energy-Efficient Performance: Helps reduce long-term electricity expenses during continuous operation.
  • Improved Indoor Air Quality: MERV-13 filtration helps maintain cleaner and healthier indoor environments.
  • Ideal for Large Commercial Applications: Designed for grow rooms, warehouses, greenhouses, restoration projects, and industrial spaces.
  • Professional-Grade Operation: Engineered for demanding environments requiring reliable humidity control.
  • Flexible Space-Saving Installation: Overhead mounting capability helps maximize available floor space.
  • Easy Maintenance & Service: Accessible panels and onboard diagnostics simplify upkeep and operation.
  • Trusted Quest Engineering: Known for dependable and energy-efficient dehumidification performance.
More Information
Quest 225 Commercial Overhead Dehumidifier, 225-Pint | 208/230V | R454B
FeatureSpec
SKUQU14856
Weight (in lbs)130
Size225 Pints
Brand/ManufacturerQuest
UPC810017961573
Included ItemsDehumidifier (1), feet (4), drain hose (1), drain adapter (3/4” NPT PVC to 5/8” hose barb), rivnut plugs (4)
Additional InformationAuto-Restart
Additional InformationCertifications: cETLus
Additional InformationEnergy Factor: 3.9 L/kWh
Heating BTU10,200
Maximum CFM630 CFM
Square Foot4,000+
Speed1 Speed
RefrigerantR454B
Capacity225 pints
Electrical208-230V, 60 Hz
Wattage1150 W
Max Breaker Size5.3 Amps
Length26.8"
Height20.9"
Width23.6"
Pint Capacity200+
Additional InfoCabinet Width: 23.6"
Warranty1-Year Parts and Labor | 5-Year Sealed Refrigerant System
Resources You will need Adobe® Acrobat® Reader to view PDF documents.
Safety InformationPROPOSITION 65 WARNING
Top reviews
  1. Quest 100
    Quality
    100%
    Service
    100%
    Price
    100%
    Using 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.

    Review by

    Posted on

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.
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