Ready for Anything
From large health spas, grow rooms, self-storage units to warehouse corners—whatever your space, the Quest 255 delivers. It’s built to thrive in a wide range of environments, and it never compromises on performance or reliability.
Ideal for: Perfect for health studios, supplement storage, red light therapy rooms, and indoor gardens, sports facilities, agriculture, manufacturing, distribution, food & beverage, logistics, self-storage, and more.
Smart Humidity Control with Filter Compensation
At the heart of the Quest 335 is Filter Compensation Technology—a smart feature using a pressure sensor and variable-speed fan to maintain consistent airflow. As the filter accumulates debris, the fan adjusts automatically to keep the humidity level steady and the air moving efficiently. Just set the fan to "Auto" to activate this function.
Control Onboard or Remotely
The built-in humidistat allows for easy programming with adjustable fan speeds (high, low, or auto). When set to auto, the system automatically adjusts fan speed in response to pressure changes, ensuring optimal performance.
Want even more control? Use the low-voltage terminal block to connect the unit to an external controller. This setup supports remote monitoring and control—and you can link up to three units for streamlined operation.
Performance Meets Sustainability
Now featuring the eco-friendlier R-454B refrigerant, the redesigned Quest 335 delivers exceptional performance with less environmental impact. It removes up to 8.5 pints of moisture per kilowatt-hour (at AHAM conditions), or 6 pints/kWh at 75°F and 50% relative humidity.
Ductable Design for Flexible Placement
When in-room placement isn’t feasible, you can easily duct the Quest 335 into your space using a separately available supply and return duct kit.
Extra Features That Matter
Drainage: A ¾-inch threaded NPT port supports gravity drainage, with an optional pump kit available.
Filter & Defrost Alerts: Indicator lights notify you when the filter needs replacing or the auto-defrost is running.
Dark Mode: Keeps lights off during plant "sleep" cycles—lights stay on for only 20 seconds after activation.
Built-In Handles: For easy moving and repositioning.
Flexible Installation: Hang it overhead or set it on the floor.
Long Reach: Comes with a 10-foot power cord to give you more placement options
Built in the USA, Trusted Everywhere
Proudly engineered and manufactured in Wisconsin, the Quest 335 is the choice for gyms, health and wellness centres, Spas, indoor agriculture, food and beverage facilities, storage centers, and more. When clean, dry air matters—you can count on Quest.
Built for Growth. Designed for Peace of Mind. Whether you're running a humid gymnasium-swimming pool set up, storing materials, or managing climate-sensitive processes, the Quest 335 delivers reliable moisture control—without compromising energy efficiency or simplicity. It’s time to elevate your indoor environment with a dehumidifier designed to meet your unique needs.