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Free Shipping on most orders over $175 | Sales Tax in NJ only
Free Shipping on most orders over $175 | Sales Tax in NJ only
Quest 506 high-capacity dehumidifier with a large black intake grill featuring a hexagonal pattern, green handles on top, and the Quest logo.

Quest 506 High-Capacity Dehumidifier - 506 Pints/Day

by Quest
$8,659.95 - $8,659.95
$8,659.95
$8,659.95 - $8,659.95
$8,659.95

Qualifies for multi unit discounts

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SAVE BIG! Contact us for Bulk Pricing and Rebate Eligibility, or call us at (973) 206-7590.

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Full Manufacturer’s Warranty

You buy it, we back it! Your purchase is fully covered with a manufacturer’s warranty. More details here.

The Quest 506 277V removes 500 pints/day with M-CoRR™ Technology, R-454B eco-friendly refrigerant, and low amp draw for energy savings.

Cut energy use and control humidity precisely with a dehumidifier engineered for high-volume grow operations.

The Quest 506 Grow Dehumidifier is built for large-scale cultivation, hydroponics, and controlled agricultural facilities, delivering 500 pints per day of moisture removal at an industry-leading 9.2 pints per kilowatt hour (at 80°F, 60% RH).

Designed for 277V or 208/230V power compatibility, this model allows direct installation into existing electrical setups without needing costly buck-boost transformers or rewiring. Its low amp draw frees up electricity for lighting, ventilation, and automation systems, making it the smartest choice for energy-conscious operations.

With patented M-CoRR™ Technology, onboard digital controls, and a streamlined, space-saving design, the Quest 506 is built to maximize efficiency, reduce excess heat, and maintain precise humidity control—no compromises, no wasted power.

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-conscious 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.

What's Included?

  • Quest 506 Dehumidifier

Download Resources

Specifications

SKU: QUE4036610

Dehumidifier Type: Refrigerant Dehumidifier

Water Removal:

@ 80°F | 60% RH: 500 Pints/Day

@ 75°F | 50% RH: 320 Pints/Day

Efficiency:

@ 80°F | 60% RH: 9.2 Pints/kWh

@ 75°F | 50% RH: 6.8 Pints/kWh

Energy Factor:

@ 80°F | 60% RH: 4.4 Liters/kWh

@ 75°F | 50% RH: 3.2 Liters/kWh

Current Draw:

@ 80°F | 60% RH: 8.2 Amps

@ 75°F | 50% RH: 7.9 Amps

Power Consumption: 2,250 Watts

BTU Ratings:

Total: 30,500 BTU

Heat of Condensation: 22,800 BTU

Motor Load: 7,700 BTU

California Title 24 Compliance:

Non-Ducted Energy Factor: 6.7 Pints/kWh @ 65°F | 60% RH

Ducted Energy Factor: 7.9 Pints/kWh @ 73°F | 60% RH

CFM (Airflow): 1,150 @ 0.0” WG

Operating Temperature Range: 56°F Min – 95°F Max

Supply Voltage: 277V or 208/230V

Unit Dimensions: 44.8” L × 28.9” W × 27.4” H

Unit Weight: 275 lbs

Control Type: Onboard Digital Controls with Low Voltage Terminal Block

Air Filter:

MERV Rating: MERV 13

Dimensions: 18” × 20” × 2”

Power Cord: NEMA L7-20P

Refrigerant Type: R454B

Refrigerant Amount: 3 lbs 14 oz

Drain Port Connection: 3/4” Threaded NPT

Warranty: 5-Year Limited

Storage cabinet featuring dual doors and raised corner supports

Freestanding Unit

The Quest 506 Dehumidifier must be installed indoors in a dry, flood-protected space. Place it on a stable, level surface with enough clearance for maintenance. Ensure the unit is positioned at least 6 inches above the secondary drain pan for proper drainage and P-trap installation.

Isometric illustration of an industrial cabinet mounted overhead using suspension rods

Overhead Dehumidifier

The unit can be mounted overhead using 3/8" threaded rods attached to structural supports. It must not be suspended from the sides or ends. If installed in the air, use the included plugs to cover base pan holes for stability and proper sealing.

Drain trap diagram highlighting vented section and water seal depth

P-Trap Requirements

A P-trap with a 2-inch water seal is required to prevent air from being drawn through the condensate drain. The drain line should have a downward slope, with an open vent positioned 4 inches above the trap to avoid airlocks. Ensure the unit is elevated 6 inches above the drain pan for proper clearance.

Grow Light Central expert advice for indoor growing equipment

Who Should Use This Dehumidifier?

  • Large-scale growers needing high-capacity moisture removal with 500 pints/day.
  • Commercial facilities benefiting from 9.2 pints/kWh efficiency.
  • Operators using 277V power reducing installation costs without rewiring.
  • Sustainable businesses choosing low-GWP R-454B refrigerant for eco-friendly operation.

Best Applications

  • High-moisture environments requiring maximum efficiency with minimal energy use.
  • Overhead installations utilizing a compact, space-saving design.
  • Climate-controlled facilities benefiting from onboard digital controls for precision.
  • Energy-conscious setups meeting California Title 24 compliance for efficiency standards.

Why Shop with Grow Light Central?

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

Grow Light Central is a grow equipment solution provider connecting you to 100+ brands and 60+ suppliers trusted and used in the best grow facilities across the country.

Anthony, the owner and operator, personally ensures every order is handled right. No passing you off, no runaround, just the expert service and advice you deserve.

FAQs

What is the ideal humidity level for bud growth, and how can a humidifier help?

Seedlings thrive at 60-70% RH, vegging plants prefer 40-50% RH, and flowering needs 30-40% RH. A dehumidifier helps dial in these levels, preventing mold, mildew, and bud rot while keeping your plants healthy and maximizing yield.

What size dehumidifier do I need for my grow setup?

It depends on your grow tent or room size and how much moisture you need to pull. A 30-pint unit is great for small setups, while 50+ pint models work better for larger spaces. If you're running a big operation, go for a high-capacity unit with a built-in humidistat for full control.