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Quest New 335 Dehumidifier – 277V, 345 Pints/Day High-Efficiency Moisture Control for Commercial Use

by Quest
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Original Price $5,999.95
Current Price $5,699.95

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Description

Best commercial dehumidifier for grow rooms and industrial facilities

Take full control of your growing environment with this powerful commercial dehumidifier. Built for serious applications, it delivers 345 pints per day at 8.0 pints/kWh efficiency using patented M-CoRR™ technology. Whether you’re managing a large-scale grow, manufacturing floor, or warehouse — this unit provides unmatched efficiency and air quality in a 277V configuration.

Quick-Glance Benefits

Ultra-Low Amp Draw Uses only 6.3 amps at 277V to free up circuits
🌀 900 CFM Airflow Moves more air for faster, more efficient drying
🌡️ Widest Operating Range Performs in 56°F to 95°F environments
🧪 MERV-13 Filtration Captures more dust, mold, and allergens for cleaner air
🚚 Fast, Free U.S. Shipping Ships from Wisconsin with full warranty support

 

What’s Included

  • 1x Quest New 335 High-Efficiency Dehumidifier, 277V
  • 1x User Manual
  • Power Cable

Use It For

 Indoor Grow Rooms
 Manufacturing & Warehouses
Climate-Controlled Facilities
Distribution & Cold Storage

Key Features

Quest New 335 Dehumidifier – 277V features

🔁 Patented M-CoRR™ Tech Recycles heat to boost efficiency and reduce BTUs
🏗️ Overhead or Ground Mount Flexible placement with integrated handles
📋 California Title 24 Compliant Meets energy codes for ducted and non-ducted use
🔌 Plug-n-Play No complex installation — ready out of the box

Ready to upgrade your grow setup?

Order the Quest New 335 High-Efficiency Dehumidifier, 277V today and take full control of your growing environment—with smarter automation and reliable results.

Installation Options 

Freestanding dehumidifier

Quest New 335 Dehumidifier – 277V freestanding

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

Quest New 335 Dehumidifier – 277V hanging

P-Trap Requirements

Quest New 335 Dehumidifier – 277V p- trap

Quest New 335 High-Efficiency Dehumidifier, 277V Specifications

  • Moisture Removal: 345 Pints/Day @ 80°F, 60% RH

  • Energy Efficiency: 8.5 Pints/kWh

  • Voltage: 277V, 60 Hz

  • Amperage: 6.3 Amps

  • Wattage: 1,150 Watts

  • BTU Output: 14,155 BTU/hr

  • Dimensions (Unboxed): 26.8" L x 23.6" W x 20.9" H

  • Shipping Dimensions: 36.0" L x 28.0" W x 30.0" H

  • Weight (Unit): 130 lbs

  • Shipping Weight: 240 lbs

  • Filtration: MERV-13

  • Certifications: ETL Listed, Title 24 Compliant

  • UPC: 810017961597

  • Product Code: 4046210

Quest New 335 High-Efficiency Dehumidifier, 277V User Manuals

Quest 335 Dehumidifier – 277V, 345 Pints/Day High-Efficiency Moisture Control for Commercial Grow Environments Spec Sheet 

Quest 335 Dehumidifier – 277V, 345 Pints/Day High-Efficiency Moisture Control for Commercial Grow Environments Indoor Farming Brochure 

Quest 335 Dehumidifier – 277V, 345 Pints/Day High-Efficiency Moisture Control for Commercial Grow Environments Industrial Refrigeration Brochure 

Quest 335 Dehumidifier – 277V, 345 Pints/Day High-Efficiency Moisture Control for Commercial Grow Environments Quick Start Guide 

Quest 335 Dehumidifier – 277V, 345 Pints/Day High-Efficiency Moisture Control for Commercial Grow Environments User Manual 

Quest New 335 High-Efficiency Dehumidifier, 277V Warranty

  • Manufacturer Warranty: 5 Years
  • Covers defects in materials and workmanship
  • Support handled directly through manufacturer or our team

FAQ

Q: What’s the difference between the 208/230V and 277V models?
A: The 277V version draws less amperage (6.3A), making it more efficient in facilities that already use 277V circuits—common for commercial lighting setups.

Q: What is M-CoRR technology and why does it matter?
A: M-CoRR is a patented multi-coil refrigeration system that recycles heat for greater energy efficiency and reduced room heat output.

Q: Can this unit be ducted?
A: Yes, it supports both ducted and freestanding installations and meets Title 24 requirements for either setup.

Q: What kind of filtration does it use?
A: It uses a MERV-13 filter, which captures mold, mildew, viruses, and other particulates without affecting airflow performance.

Q: Where is the Quest 335 manufactured?
A: It is engineered and assembled in Madison, Wisconsin, ensuring top-tier build quality.

Q: What warranty does the unit include?
A: It comes with a 5-year warranty on the compressor and coils, and 1 year on parts and labor.

Why Buy From US

Who We Are

At Garden GrowShop, we're not a faceless online retailer. We're a small, family-run business with real roots in the growing community. Every product we carry has been carefully chosen to meet the needs of both home growers and commercial operators — because we’ve walked in your shoes.

Personal, Knowledgeable Support
When you reach out to us, you’re not getting a canned reply or being passed between departments. You're talking to someone who actually knows the products, understands your challenges, and is here to help you succeed.

Transparent Pricing — No Gimmicks
We believe in fair, honest pricing. No inflated markups, no bait-and-switch tactics. If you ever find a better price on the same item, let us know — we’ll match it without the hassle.

Fast, Dependable Shipping
We ship directly from warehouses across the U.S. to get your order to you quickly and reliably. No inflated delivery timelines, and no surprise shipping fees — just smooth, on-time delivery you can count on.

A Partnership, Not a Transaction
Our customers stick with us because we treat them like partners. Whether you're outfitting a small indoor setup or managing a large-scale operation, we’re here to grow with you — not just sell you equipment.

Our Commitment
If something goes wrong, we don’t pass the buck. We work with you directly to make it right. That’s how we’ve built our business, and that’s how we plan to keep it.

Shipping/ Returns

Shipping Policy

Free Shipping Within the Continental U.S.
We offer free shipping on all orders shipped to addresses within the continental United States. There are no hidden fees, minimum order requirements, or handling charges. The price you see at checkout is the final price you pay.

Order Processing
Orders are typically processed within 1–2 business days (Monday–Friday). If an item is temporarily backordered or delayed, we’ll notify you by email with an updated shipping estimate.

Shipping Confirmation & Tracking
Once your order has shipped, we’ll email you a shipping confirmation that includes tracking information. You can use this to monitor the delivery status of your package in real time.

Estimated Delivery Time
Most orders arrive within 3–7 business days of shipping, depending on your location and the item’s warehouse origin. Freight items and oversized packages may take additional time.

Shipping Carriers
We use trusted carriers such as FedEx, UPS, USPS, and professional freight delivery services for large or heavy items. Depending on the size of your order, it may arrive in multiple packages or from multiple warehouses.

Delivery and Moving Disclaimer
Please note: We do not offer moving or installation services. For freight shipments or large items, carriers are only responsible for curbside delivery. Drivers are not required to move items inside your home, up stairs, or to specific locations. We strongly recommend having assistance available at the time of delivery for heavy or bulky shipments.

Address Accuracy & Order Changes
Please ensure your shipping address is correct at the time of checkout. Once an order has shipped, we are unable to change the delivery address or reroute the shipment. If you need to make changes to your order, contact us immediately after placing it.

Damaged or Lost Shipments
If your order arrives damaged or appears to be lost in transit, contact us within 48 hours of delivery (or expected delivery). We will work with the carrier to resolve the issue as quickly as possible.

Shipping Restrictions
We currently ship only to addresses within the continental United States. We do not ship to Alaska, Hawaii, U.S. territories, or international destinations.

Questions?
If you have questions about your order, delivery, or shipping process, feel free to reach out to us through our Contact Us page or via email. We’re here to help.

Start of Returns section 

Easy Returns, No Surprises

At Garden GrowShop, we stand behind the quality of every product we carry. But we also understand that sometimes things just don’t work out — and that’s okay. If you change your mind or the item isn’t quite what you expected, we’ve got you covered.

30-Day Return Guarantee

You have 30 days from the date of delivery to request a return for any reason. To start a return, simply email us at sales@gardengrowshop.com with your order number and we’ll walk you through the process.

Here’s what to expect:

  • You’ll receive clear return instructions from our team.

  • Once your item is received and inspected, we’ll issue a refund to your original payment method.

  • Items must be returned in “like new” condition, with all original packaging and accessories.

  • Return shipping costs are the responsibility of the customer.

“Like new” means no visible wear, damage, or missing parts. Items showing signs of use or misuse may not qualify for a refund.


Damaged or Defective Orders

If your order arrives damaged or defective, don’t worry — we’ll take care of it.

Here’s what to do:

  • Note any damage with the delivery driver when signing for the package.

  • Email photos and a description of the issue to sales@gardengrowshop.com on the same day you receive it.

  • We’ll cover the cost of return shipping and make sure a replacement is sent out quickly.

Please keep all original packaging in case a return is needed. This helps speed up the process and ensures a smooth resolution.


Order Cancellations

If you need to cancel your order, please contact us as soon as possible at sales@gardengrowshop.com or by phone.

  • Cancellations before shipment receive a full refund.

  • Cancellations after shipment will follow our standard return policy and may be subject to return shipping costs.


Important Return Notes:

  • Certain products may have brand-specific return restrictions, which will be noted on the product page.

  • Products purchased for temporary or single-use purposes (e.g. trade shows, promotional events) are not eligible for return.


We’re Here to Help

Our goal is to make returns and exchanges as easy as possible — with no stress and no surprises. If you’re unsure whether your order qualifies or just want to ask a question, don’t hesitate to reach out. We’re here to make sure you feel confident before and after your purchase.

Why Garden GrowShop?

We’re an authorized dealer for every brand we sell—so you’ll always get full manufacturer warranties, premium support, and authentic gear direct from the source.

✅ Fast, tracked shipping on all orders
✅ 100% safe and secure checkout
✅ No restocking fees on returns
✅ Friendly U.S.-based support when you need it

Have questions? We're here to help. Whether you're just getting started or scaling up a full grow, our experts can guide you to the right gear.

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Description

Best commercial dehumidifier for grow rooms and industrial facilities

Take full control of your growing environment with this powerful commercial dehumidifier. Built for serious applications, it delivers 345 pints per day at 8.0 pints/kWh efficiency using patented M-CoRR™ technology. Whether you’re managing a large-scale grow, manufacturing floor, or warehouse — this unit provides unmatched efficiency and air quality in a 277V configuration.

Quick-Glance Benefits

Ultra-Low Amp Draw Uses only 6.3 amps at 277V to free up circuits
🌀 900 CFM Airflow Moves more air for faster, more efficient drying
🌡️ Widest Operating Range Performs in 56°F to 95°F environments
🧪 MERV-13 Filtration Captures more dust, mold, and allergens for cleaner air
🚚 Fast, Free U.S. Shipping Ships from Wisconsin with full warranty support

 

What’s Included

  • 1x Quest New 335 High-Efficiency Dehumidifier, 277V
  • 1x User Manual
  • Power Cable

Use It For

 Indoor Grow Rooms
 Manufacturing & Warehouses
Climate-Controlled Facilities
Distribution & Cold Storage

Key Features

Quest New 335 Dehumidifier – 277V features

🔁 Patented M-CoRR™ Tech Recycles heat to boost efficiency and reduce BTUs
🏗️ Overhead or Ground Mount Flexible placement with integrated handles
📋 California Title 24 Compliant Meets energy codes for ducted and non-ducted use
🔌 Plug-n-Play No complex installation — ready out of the box

Ready to upgrade your grow setup?

Order the Quest New 335 High-Efficiency Dehumidifier, 277V today and take full control of your growing environment—with smarter automation and reliable results.

Installation Options 

Freestanding dehumidifier

Quest New 335 Dehumidifier – 277V freestanding

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

Quest New 335 Dehumidifier – 277V hanging

P-Trap Requirements

Quest New 335 Dehumidifier – 277V p- trap

Quest New 335 High-Efficiency Dehumidifier, 277V Specifications

  • Moisture Removal: 345 Pints/Day @ 80°F, 60% RH

  • Energy Efficiency: 8.5 Pints/kWh

  • Voltage: 277V, 60 Hz

  • Amperage: 6.3 Amps

  • Wattage: 1,150 Watts

  • BTU Output: 14,155 BTU/hr

  • Dimensions (Unboxed): 26.8" L x 23.6" W x 20.9" H

  • Shipping Dimensions: 36.0" L x 28.0" W x 30.0" H

  • Weight (Unit): 130 lbs

  • Shipping Weight: 240 lbs

  • Filtration: MERV-13

  • Certifications: ETL Listed, Title 24 Compliant

  • UPC: 810017961597

  • Product Code: 4046210

Quest New 335 High-Efficiency Dehumidifier, 277V User Manuals

Quest 335 Dehumidifier – 277V, 345 Pints/Day High-Efficiency Moisture Control for Commercial Grow Environments Spec Sheet 

Quest 335 Dehumidifier – 277V, 345 Pints/Day High-Efficiency Moisture Control for Commercial Grow Environments Indoor Farming Brochure 

Quest 335 Dehumidifier – 277V, 345 Pints/Day High-Efficiency Moisture Control for Commercial Grow Environments Industrial Refrigeration Brochure 

Quest 335 Dehumidifier – 277V, 345 Pints/Day High-Efficiency Moisture Control for Commercial Grow Environments Quick Start Guide 

Quest 335 Dehumidifier – 277V, 345 Pints/Day High-Efficiency Moisture Control for Commercial Grow Environments User Manual 

Quest New 335 High-Efficiency Dehumidifier, 277V Warranty

  • Manufacturer Warranty: 5 Years
  • Covers defects in materials and workmanship
  • Support handled directly through manufacturer or our team

FAQ

Q: What’s the difference between the 208/230V and 277V models?
A: The 277V version draws less amperage (6.3A), making it more efficient in facilities that already use 277V circuits—common for commercial lighting setups.

Q: What is M-CoRR technology and why does it matter?
A: M-CoRR is a patented multi-coil refrigeration system that recycles heat for greater energy efficiency and reduced room heat output.

Q: Can this unit be ducted?
A: Yes, it supports both ducted and freestanding installations and meets Title 24 requirements for either setup.

Q: What kind of filtration does it use?
A: It uses a MERV-13 filter, which captures mold, mildew, viruses, and other particulates without affecting airflow performance.

Q: Where is the Quest 335 manufactured?
A: It is engineered and assembled in Madison, Wisconsin, ensuring top-tier build quality.

Q: What warranty does the unit include?
A: It comes with a 5-year warranty on the compressor and coils, and 1 year on parts and labor.

Why Buy From US

Who We Are

At Garden GrowShop, we're not a faceless online retailer. We're a small, family-run business with real roots in the growing community. Every product we carry has been carefully chosen to meet the needs of both home growers and commercial operators — because we’ve walked in your shoes.

Personal, Knowledgeable Support
When you reach out to us, you’re not getting a canned reply or being passed between departments. You're talking to someone who actually knows the products, understands your challenges, and is here to help you succeed.

Transparent Pricing — No Gimmicks
We believe in fair, honest pricing. No inflated markups, no bait-and-switch tactics. If you ever find a better price on the same item, let us know — we’ll match it without the hassle.

Fast, Dependable Shipping
We ship directly from warehouses across the U.S. to get your order to you quickly and reliably. No inflated delivery timelines, and no surprise shipping fees — just smooth, on-time delivery you can count on.

A Partnership, Not a Transaction
Our customers stick with us because we treat them like partners. Whether you're outfitting a small indoor setup or managing a large-scale operation, we’re here to grow with you — not just sell you equipment.

Our Commitment
If something goes wrong, we don’t pass the buck. We work with you directly to make it right. That’s how we’ve built our business, and that’s how we plan to keep it.

Shipping/ Returns

Shipping Policy

Free Shipping Within the Continental U.S.
We offer free shipping on all orders shipped to addresses within the continental United States. There are no hidden fees, minimum order requirements, or handling charges. The price you see at checkout is the final price you pay.

Order Processing
Orders are typically processed within 1–2 business days (Monday–Friday). If an item is temporarily backordered or delayed, we’ll notify you by email with an updated shipping estimate.

Shipping Confirmation & Tracking
Once your order has shipped, we’ll email you a shipping confirmation that includes tracking information. You can use this to monitor the delivery status of your package in real time.

Estimated Delivery Time
Most orders arrive within 3–7 business days of shipping, depending on your location and the item’s warehouse origin. Freight items and oversized packages may take additional time.

Shipping Carriers
We use trusted carriers such as FedEx, UPS, USPS, and professional freight delivery services for large or heavy items. Depending on the size of your order, it may arrive in multiple packages or from multiple warehouses.

Delivery and Moving Disclaimer
Please note: We do not offer moving or installation services. For freight shipments or large items, carriers are only responsible for curbside delivery. Drivers are not required to move items inside your home, up stairs, or to specific locations. We strongly recommend having assistance available at the time of delivery for heavy or bulky shipments.

Address Accuracy & Order Changes
Please ensure your shipping address is correct at the time of checkout. Once an order has shipped, we are unable to change the delivery address or reroute the shipment. If you need to make changes to your order, contact us immediately after placing it.

Damaged or Lost Shipments
If your order arrives damaged or appears to be lost in transit, contact us within 48 hours of delivery (or expected delivery). We will work with the carrier to resolve the issue as quickly as possible.

Shipping Restrictions
We currently ship only to addresses within the continental United States. We do not ship to Alaska, Hawaii, U.S. territories, or international destinations.

Questions?
If you have questions about your order, delivery, or shipping process, feel free to reach out to us through our Contact Us page or via email. We’re here to help.

Start of Returns section 

Easy Returns, No Surprises

At Garden GrowShop, we stand behind the quality of every product we carry. But we also understand that sometimes things just don’t work out — and that’s okay. If you change your mind or the item isn’t quite what you expected, we’ve got you covered.

30-Day Return Guarantee

You have 30 days from the date of delivery to request a return for any reason. To start a return, simply email us at sales@gardengrowshop.com with your order number and we’ll walk you through the process.

Here’s what to expect:

  • You’ll receive clear return instructions from our team.

  • Once your item is received and inspected, we’ll issue a refund to your original payment method.

  • Items must be returned in “like new” condition, with all original packaging and accessories.

  • Return shipping costs are the responsibility of the customer.

“Like new” means no visible wear, damage, or missing parts. Items showing signs of use or misuse may not qualify for a refund.


Damaged or Defective Orders

If your order arrives damaged or defective, don’t worry — we’ll take care of it.

Here’s what to do:

  • Note any damage with the delivery driver when signing for the package.

  • Email photos and a description of the issue to sales@gardengrowshop.com on the same day you receive it.

  • We’ll cover the cost of return shipping and make sure a replacement is sent out quickly.

Please keep all original packaging in case a return is needed. This helps speed up the process and ensures a smooth resolution.


Order Cancellations

If you need to cancel your order, please contact us as soon as possible at sales@gardengrowshop.com or by phone.

  • Cancellations before shipment receive a full refund.

  • Cancellations after shipment will follow our standard return policy and may be subject to return shipping costs.


Important Return Notes:

  • Certain products may have brand-specific return restrictions, which will be noted on the product page.

  • Products purchased for temporary or single-use purposes (e.g. trade shows, promotional events) are not eligible for return.


We’re Here to Help

Our goal is to make returns and exchanges as easy as possible — with no stress and no surprises. If you’re unsure whether your order qualifies or just want to ask a question, don’t hesitate to reach out. We’re here to make sure you feel confident before and after your purchase.

Why Garden GrowShop?

We’re an authorized dealer for every brand we sell—so you’ll always get full manufacturer warranties, premium support, and authentic gear direct from the source.

✅ Fast, tracked shipping on all orders
✅ 100% safe and secure checkout
✅ No restocking fees on returns
✅ Friendly U.S.-based support when you need it

Have questions? We're here to help. Whether you're just getting started or scaling up a full grow, our experts can guide you to the right gear.