Skip to main content

(360) 800-5535 · Mon–Fri 9am–5pm PST

Login
0 Cart { % include 'bold-options-hybrid-cart-item-count' % }
Login
Mon-Fri 9am-5pm PST
(360) 800-5535 Email Us
Search
0 Cart
(360) 800-5535

Send Us a Message

Search

Quest 746 industrial dehumidifier with white casing, green handles, and dual air filters.
Quest industrial dehumidifier with dual pleated filters, green handles, and digital control panel.
Black dehumidifier control panel with power, filter reset, and mode buttons next to a pleated air filter.
Quest 746 industrial dehumidifier with white casing, green handles, and dual air filters.
Quest industrial dehumidifier with dual pleated filters, green handles, and digital control panel.
Black dehumidifier control panel with power, filter reset, and mode buttons next to a pleated air filter.

Quest 746 480V Industrial Dehumidifier — 746 Pints/Day

Official Quest Dealer Model: 4046320
$12,999.95 USD$10,999.00 USD$12,999.95 USD
 $12,999.95 USD
starting from 0% interest financing from /mo.

Payment Options

Options:Pay in Four, Pay Monthly
Amount:Up to $1,500 (Pay in 4)
Up to $10,000 (Monthly)
Schedule:Bi-weekly to Monthly
Term:6 weeks, 12 or 24 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Schedule:Bi-weekly to Monthly
Term:6 weeks, 6 or 12 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Finance up to:$4,000
Must apply on a desktop device.
Schedule:Flexible
Term:Up to 36 months
Interest:Processing fee + interest
Lease-to-Own?Yes
Amount:$500 to $10,000
Looking to finance equipment under your corporation? Learn more about Business Financing
  • 746 pints of moisture removal per day
  • Patented M-CoRR technology achieves 7.3 pints/kWh efficiency
  • 480V three-phase configuration draws only 6.5 amps
  • 5-year warranty
  • View More Details
Order today, ships between June 25 - July 9, 2026

Earn 10,999 points for shopping and get $109.99 off your next order. Join Harvest Club for free.
Questions? Talk to a specialist. Mon–Fri, 9am–5pm PST
(360) 800-5535 Live Chat Available now
Free Shipping On Most Items* To the lower 48
Transparent Pricing Backed w/ price match guarantee
4.8/5 Rating 1938+ verified reviews
Secure Checkout SSL encrypted payments

Send Us a Message
REBATE PROGRAM

Commercial Rebate Program

Licensed operations may qualify for up to a 60% rebate on qualifying equipment.

Rebate & Commercial Inquiry

Contact Information
THROUGH THE Cultivator's LENS Hands-On Evaluation

Who This Is For

  • You are scaling up your facility because your current dehumidifiers are maxing out your electrical panel capacity
  • You are setting up a large commercial space because you need to hit Title 24 energy standards to stay compliant

What We Found

  • We found the integrated handles are positioned perfectly for a two-person lift onto an overhead mounting rack.
  • Mounting this overhead is the way to go since it frees up floor space and keeps the drainage lines out of the way.

What Users Say

  • Operators who switched to this unit say they finally stopped worrying about humidity swings during the night cycle.
  • Facility managers say the low amp draw allowed them to add more equipment without upgrading their main panel.

Quest 746 480V | High-Efficiency 730 PPD Industrial Dehumidifier

The Quest 746 480V provides high-capacity moisture removal for commercial facilities with 480V 3-phase power infrastructure. This industrial dehumidifier extracts 730 pints of water per day while maintaining an efficiency rating of 8.3 pints per kWh. It utilizes patented M-CoRR technology to recycle energy during the dehumidification process, reducing the thermal load on your existing cooling systems.

Quest 746 480V High Capacity Dehumidifier in use
730Pints/DayWater removal capacity
8.3Pints/kWhOperating efficiency
1,650CFMTotal airflow
4.9AmpsCurrent draw at 480V

In Detail

Quest 746 480V digital control interface

The Quest 746 is engineered for precise environmental management in large-scale agricultural and industrial settings. It features an onboard digital control panel that allows for relative humidity setpoints in 1% increments. The unit is built for versatile installation, supporting both overhead hanging and ground placement to maximize floor space in tight mechanical rooms. Self-diagnostics and maintenance notifications ensure the system operates at peak performance without constant manual oversight.

  • Patented M-CoRR technology recycles energy to maximize water removal per watt.
  • MERV 13 filtration captures mold, bacteria, and dust to protect sensitive crops.
  • Dark Mode reduces light pollution in sensitive agricultural environments.
  • Auto Restart function maintains all settings following a power interruption.
  • Low-GWP R454B refrigerant meets modern environmental compliance standards.

Features

M-CoRR Technology

This patented multi-coil system reuses energy within the unit to achieve industry-leading efficiency levels.

Dark Mode Operation

The digital display can be dimmed or disabled to prevent light leaks in light-sensitive grow cycles.

MERV 13 Filtration

High-grade pleated filters remove airborne contaminants to maintain superior indoor air quality.

Eco-Friendly Refrigerant

The R454B refrigerant reduces global warming potential by 78% compared to traditional commercial alternatives.

Compare the Quest Line

Capacity
Efficiency
Voltage
Best For
Quest 100Quest 100
100 PPD
7.5 Pints/kWh
110-120V
Small grow rooms or residential basements.
Hi-E Dry 140Hi-E Dry 140
135 PPD
7.2 Pints/kWh
110–120 VAC, 1 Phase, 60 Hz
Portable use in flood restoration or logistics.
Quest 155Quest 155
155 PPD
8.5 Pints/kWh
110-120 VAC, 1 Phase, 60 Hz
High-efficiency moisture control for mid-sized rooms.
Hi-E Dry 195Hi-E Dry 195
195 PPD
6.1 Pints/kWh
110–120 VAC, 1 Phase, 60 Hz
Large portable moisture removal for industrial sites.
Next-Gen 225Next-Gen 225
225 Pints/Day
7.6 Pints/kWh
208-230V
Commercial facilities with standard 240V power.
Quest 335Quest 335
345 PPD
8.2 Pints/kWh
208–230 VAC, 1 Phase, 60 Hz
Professional growers needing high efficiency at 230V.
Quest 335 277VQuest 335 277V
345 Pints/Day @ 80 F | 60% RH
8.2 Pints/kWh @ 80 F | 60% RH
277V
Industrial applications with 277V lighting circuits.
Quest 506Quest 506
500 PPD
9.2 Pints/kWh
208V-230V
Large commercial operations with 230V infrastructure.
Quest 506 277VQuest 506 277V
500 PPD
9.2 Pints/kWh
277V
High-capacity removal for facilities with 277V power.
Quest 746 480VQuest 746 480VYou're viewing
730 PPD
8.3 Pints/kWh
480V
Maximum capacity for industrial sites with 480V 3-phase power.

Technical Specifications

PERFORMANCE
Capacity730 Pints/Day
Efficiency8.3 Pints/kWh
Energy Factor3.9 Liters/kWh
CFM1,650
Operating Temperature56 F Min–95 F Max
BTU (Total)45,700
ELECTRICAL
Supply Voltage480V – 3 Phase
Current Draw4.9 Amps
Power3,665 Watts
Power CordHardwire Only
FILTRATION & REFRIGERANT
Air Filter MERV RatingMERV 13
Air Filter Dimensions18″ x 20″ x 2″
Refrigerant TypeR454B
Refrigerant Amount6 lb 8 oz
DIMENSIONS
Drain Port Connection3/4″ Threaded NPT
Part Number4046320

Warranty

The Quest 746 comes with a 5-year limited warranty, providing protection for your long-term investment in commercial climate control. This coverage ensures reliability in demanding industrial environments where consistent moisture removal is critical for operational success. Trimleaf is an authorized Quest retailer; this unit ships with the full manufacturer warranty, valid for the original purchaser.

Owner's Manual

Product Manual

Frequently Asked Questions

Can this unit be plugged into a standard 120V outlet?

No, this unit requires a 480V 3-phase power supply and is designed for hardwire installation only. It will not operate on residential or light commercial single-phase circuits.

What type of maintenance is required for the MERV 13 filters?

Filters should be inspected regularly and replaced when the onboard digital control panel triggers a filter change notification. The MERV 13 rating ensures high-efficiency filtration of mold and bacteria, which is essential for agricultural hygiene.

Does the unit produce visible light during operation?

The Quest 746 includes a Dark Mode feature that allows you to dim or turn off the digital display. This is specifically designed for light-sensitive environments where total darkness is required during certain cycles.

How does the unit handle power outages?

The Auto Restart function ensures the dehumidifier resumes operation with your previous settings as soon as power is restored. This prevents environmental drift in facilities that are not monitored 24/7.

What is the benefit of R454B refrigerant?

R454B is a next-generation refrigerant with a significantly lower global warming potential than R410A. It allows facilities to meet stringent environmental regulations without sacrificing moisture removal performance.

Can I hang this unit from the ceiling to save floor space?

Yes, the unit features integrated hanging points and handles specifically for overhead installation. This allows facility managers to clear floor space for other equipment or traffic.

Happy To Help

Questions About This Product?

Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)

Call (360) 800-5535

Why Trimleaf

Equipping home growers, craft producers, and commercial operations across North America since 2016.

10+
Years of Specialist Knowledge
4.8★
Over 1,900 Verified Reviews
50,000+
Growers Served
120+
Top Equipment Brands in Stock

You may also like