White Quest 225 high-efficiency overhead dehumidifier showing the air intake filter and digital control panel.

Quest 225 208/230V High Efficiency Overhead Dehumidifier - 225 Pints/Day

Q: 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.

by Quest

$3,999.95 - $3,999.95

$3,999.95

$3,999.95 - $3,999.95

$3,999.95

Qualifies for multi unit discounts

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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.

With M-CoRR Technology, 208/230V flexibility, and compact design, the Quest 225 delivers efficient dehumidification with easy installation and digital controls.

Slash energy costs and control humidity with this high-capacity overhead dehumidifier designed for sealed grow rooms and hydro setups.

The Quest 225 208/230V Grow Dehumidifier is designed for commercial grow operations, offering industry-leading energy efficiency, powerful moisture removal, and flexible installation options. This high-performance unit removes excess humidity while keeping energy costs low, thanks to Quest’s patented M-CoRR Technology, which recycles heat instead of wasting it. That means less heat output, lower A/C usage, and reduced operational costs—a game-changer for any grow space.

Built to integrate seamlessly into large-scale sealed grow rooms, hydroponic setups, and commercial greenhouses, the Quest 225 features digital controls, a flexible 208/230V voltage range, and an advanced MERV-13 filtration system to maintain a clean, stable grow environment. Plus, with integrated lift and hang points, you get versatile placement options to maximize space efficiency.

Features

Compact unit – For mobility and a small footprint that won’t interfere with operations.
Overhead or ground placement – Built to fit what works for your space.
UL rated and ETL listed – The highest safety standard.
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.
Integrated handles & hanging points – For easier movement and installation.
Plug-n-play – No installation required.
High efficiency – No dehumidifier is more efficient.
Auto restart – Unit automatically defaults to prior settings in the event of a power outage.
Widest operating range – Of temperature and relative humidity.
Long power cord – For extended reach.
Digital control – Digital control interface with external control option.

What's Included?

Dehumidifier
4 x Feet
Drain Hose
Drain Adapter ¾” NPT PVC to 5/8” Hose Barb
4 x Rivnut Plugs

Download Resources

Specifications

SKU: QUE4046100

Part Number: 4046100

Dehumidifier Type: Refrigerant Dehumidifier

Water Removal:

@ 80°F | 60% RH: 225 Pints/Day

@ 75°F | 50% RH: 130 Pints/Day

Efficiency:

@ 80°F | 60% RH: 7.6 Pints/kWh

@ 75°F | 50% RH: 4.7 Pints/kWh

Energy Factor:

@ 80°F | 60% RH: 3.6 Liters/kWh

@ 75°F | 50% RH: 2.2 Liters/kWh

Current Draw:

@ 80°F | 60% RH: 5.5 Amps @ 230V / 6.1 Amps @ 208V

@ 75°F | 50% RH: 5.0 Amps @ 230V / 5.5 Amps @ 208V

Power Consumption: 1230 Watts

BTU Ratings:

Total: 14,400 BTU

Heat of Condensation: 10,200 BTU

Motor Load: 4,200 BTU

California Title 24 Compliance:

Ducted Energy Factor: 6.3 Pints/kWh @ 73°F | 60% RH

CFM (Airflow): 630

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

Supply Voltage: 208-230V

Unit Dimensions: 26.8” L × 23.6” W × 20.9” H

Unit Weight: 130 lbs

Control Type: Onboard digital controls with low voltage terminal block

Air Filter:

MERV Rating: MERV 13

Dimensions: 18” × 18” × 2”

Recommended Breaker Size: 15

Power Cord / Plug: 14/3, SJTW (6’) / NEMA 6-15P

Refrigerant Type: R454B

Refrigerant Amount: 3 lbs 4 oz

Drain Port Connection: 3/4” Threaded NPT

Fans: Single Speed Impeller

Warranty: 5-Year Limited

Freestanding dehumidifier unit with digital display and water tank

Freestanding Installation (On the Ground)

For ground installation, place the Quest 225 dehumidifier on a stable, level surface, ensuring it is elevated at least 6 inches above the secondary drain pan to allow proper drainage. Use the included plugs to seal hanging locations on the top of the unit.

Ceiling-mounted dehumidifier unit with grille and control panel

Overhead Installation

The unit can be mounted overhead using 3/8" threaded rods or steel hangers/straps attached to structural members. Do not suspend the unit from its sides or ends. If mounted in the air, cover the base pan holes with the included plugs to ensure stability.

White PVC P-trap plumbing drain pipe under sink

P-Trap Requirements

A P-trap with a 2-inch water seal is required to prevent air from being pulled through the condensate drain. Ensure the drain line is sloped downward, with an open vent 4 inches above the trap to prevent airlocks. The unit must be elevated 6 inches above the drain pan to accommodate the P-trap.

Grow Light Central expert advice for indoor growing equipment

Who Should Use This Dehumidifier?

Commercial growers optimizing humidity control with high energy efficiency.
Facility managers reducing operational costs with M-CoRR heat recycling.
Health-conscious environments benefiting from MERV-13 air filtration.
Installers needing flexibility with a 208/230V voltage range for more options.

Best Applications

Grow rooms and large facilities maintaining stable humidity with minimal heat output.
Climate-sensitive spaces using MERV-13 filtration to prevent mold and mildew.
Energy-conscious operations meeting California Title 24 compliance.
Scalable setups with integrated lift and hang points for easy installation.

Why Shop with Grow Light Central?

“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.