NEW!
Quest 506 277V
High Capacity Dehumidifier Series
Model #4046310
@ 80 F | 60% RH
- Capacity 500 Pints/Day
- Efficiency 9.2 Pints/kWh
- Supply Voltage 277V
- Current Draw 8.2 Amps

Quest 506 Overview
Taking innovation to the next level, we’ve improved on the design of the original Quest 506 277V dehumidifier. This newest generation of the 506 surpasses the Quest 335 as the world’s most energy-efficient dehumidifier on the market, removing 500 pints per day at an impressive 9.2 pints per kilowatt hour (at 80°F, 60% RH).
Just like our original 506 design, the 500-pint capacity makes it one of the most powerful commercial dehumidifiers on the market. The 277V voltage provides a low amp draw, freeing up electricity for other equipment on your breaker. Best of all, these units can be installed on 277V without the additional installation of buck-boost transformers or the associated costs of rewiring.
M-CoRR™ Technology
The impressive energy efficiency is a result of Quest’s patented M-CoRR™ technology. Our unique multi-coil refrigeration design recycles excess heat to provide the highest efficiencies available on the market, while reducing heat (BTU) output into your space.
Onboard Digital Controls
You’ve been asking for it and we delivered: the new generation of Quest 506 now features Quest’s onboard digital controls. This user-friendly control panel allows for easy set points, self-diagnostics, filter change notifications, and dark mode, limiting light pollution. Additionally, the user interface features a low-voltage terminal block to utilize a remote controller, ideal for overhead installations.
Streamlined Design
Built on years of real-world feedback and observation, it was clear that most of these high-capacity units were installed overhead and in tight spaces. That insight drove our engineers to rethink the design, eliminating the feet from the previous generation to create a more compact, space-saving solution. The result? The new Quest 506 277V dehumidifier fits seamlessly into your environment with less height, and without compromising performance.
Better for the environment
The Quest 506 now utilizes the environmentally friendly refrigerant R-454B. It boasts a significantly lower Global Warming Potential (GWP) compared to the previously used R-410A, and the common R-32 found in many competitor machines. Switching to R-454B represents a crucial step forward in reducing the environmental impact of the world, and your business. By choosing a dehumidifier with a lower GWP refrigerant, you’re not only improving air quality and moisture control but also contributing to a more sustainable future. Designed to meet stringent environmental standards while maintaining exceptional performance, our upgraded product line delivers the reliability you trust with the added benefit of reduced greenhouse gas emissions.
Straight from Madison, Wisconsin
Proudly engineered and assembled in Madison, Wisconsin, the Quest 506 277V is designed to deliver unmatched reliability and efficiency. Accordingly, this unit meets California Title 24 energy requirements for both ducted (whole-home) and non-ducted (portable) installations.
Not on 277-volt power?
View the new Quest 506 208/230V
Key Features

Widest operating range
Industry’s best performance at the widest temperature and dew point operating conditions

PATENTED MULTI-COIL TECHNOLOGY
Achieves highest efficiencies
available in the market

ONBOARD DIGITAL CONTROLS
Digital control panel for easy and precise setpoints, with a low-voltage terminal block for use with an optional external controller
Features
OVERHEAD OR GROUND PLACEMENT
Built to fit what works for your space
WIDEST OPERATING RANGE
Of temperature and relative humidity
UL RATED AND ETL LISTED
The highest safety standard
INTEGRATED HANDLES & HANGING POINTS
For easier movement and installation
LONG POWER CORD
For extended reach
MERV 13 FILTRATION
Superior filtration removes more harmful contaminants from the air such as dust, pollen and mold as well as bacteria and some viruses
ENVIRONMENTALLY-CONCIOUS REFRIGERANT
Reducing greenhouse gas emissions, R454B boasts a 78% lower GWP
INDUSTRY’S LOWEST AMP DRAW
More efficient units have less heat output and free up electricity for other equipment
Specifications
@ 80 F | 60% RH
Water Removal
500 Pints/Day
Efficiency
9.2 Pints/kWh
Energy Factor
4.4 Liters/kWh
Current Draw
8.2 Amps
Power
2,250 Watts
BTU (Total)
30,500
BTU (Heat of Condensation)
22,800
BTU (Motor Load)
7,700
@ 75 F | 50% RH
Water Removal
320 Pints/Day
Efficiency
6.8 Pints/kWh
Energy Factor
3.2 Liters/kWh
Current Draw
7.9 Amps
California title 24 compliant
Non-Ducted Energy Factor
6.7 Pints/kWh @ 65 F | 60% RH
Ducted Energy Factor
7.9 Pints/kWh @ 73 F | 60% RH
Part Number
4046310
Dehumidifier Type
Refrigerant Dehumidifier
CFM
1,150 @ 0.0″ WG
Operating Temperature
56 F Min–95 F Max
Supply Voltage
277V
Unit Dimensions
44.8″ L x 28.9″ W x 27.4″ H
Unit Weight
275
Control Type
Onboard Digital Controls with Low Voltage Terminal Block
Air Filter MERV Rating
MERV 13
Air Filter Dimensions
18″ x 20″ x 2″
Power Cord
NEMA L7-20P
Refrigerant Type
R454B
Refrigerant Amount
3 lb 14 oz
Drain Port Connection
3/4″ Threaded NPT
Warranty
5 Year Limited

Downloads
Literature
Operation
Installation Options

Freestanding unit

Can be mounted overhead with use of 3/8″ Threaded Rod

P-Trap Requirements
Sizing & Selection

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