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Quest Dual 150 Overhead Dehumidifier
Quest Dual 150 Overhead Dehumidifier

Quest Dual 150 Overhead Dehumidifier

Brand: Quest Climate
Item Number: 700816

Regular price $1,824.95 $1,824.95 On Sale

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Why Buy From GrowLight Heaven

If space is an issue, choose the Dual 150. The Quest Dual 150 Overhead Dehumidifier will move dry, hot air throughout your greenhouse and indoor gardening space and removes up to 150 pints of water under standard operating (AHAM) conditions (80-F, 60%) while the onboard dehumidistat carefully monitors indoor humidity conditions.

Product Features


  • Extremely Energy Efficient: The Dual 150 was designed to provide improved value while still offering solid performance and energy efficiency. The Quest Dual 150 performs at over 4.9 pints per kWh compared to the Dual 155 at 7.3 pints per kWh.

  • Small and Compact: If space is an issue for you, then choose this dehumidifier. Only 26" long  and 19.4 inches high this unit is powerful yet compact.

  • Hands-Free Monitoring of Indoor Humidity: Unlike other dehumidifiers, this overhead Quest unit has an onboard dehumidistat and operates via three humidity levels – dry, normal, and humid. Depending on the settings, the unit will kick on when the humidity rises above the preset and will turn off when the humidity is reduced 4 – 6% relative humidity.

  • Overhead or Floor Installation: Unlike traditional dehumidifiers, the Quest Dual 150 Dehumidifier can be mounted overhead, freeing up floor space for a variety of growing needs. This installation can be completed via the Quest hanging bracket with chains, allowing for more room. While overhead installation is recommended, the Quest 150 can easily be installed on the ground floor for growers whose needs may change on a day-to-day basis.

  • Ideal for Mid Sized Areas: This unit is ideal for mid sized spaces where regulating humidity is really important. Before purchasing, consider the facility square footage, frequency of feeding, and water net usage for selecting the right Quest dehumidifier. To get answers to any specific questions about your facility and which unit is right for you, please reach out to us directly to have an expert contact you with all the information you need. 

  • Easy Installation- Plug & Play: In addition to overhead installation, the Quest 150 Dehumidifier is a plug and play dehumidifier, requiring no intricate installation process with circuits and wiring for ground or floor installation. The units feature an on-board low voltage terminal block that makes it easy to wire to external controls.

  • Dual Air Distribution – Features the Quest Dual Air Distribution for optimal dry air circulation throughout spaces.

  • Low Amp Usage – Environmentally-friendly and good on energy, this unit only uses 11.6 amps.

  • Made in the USA: The Quest Dual 150 is proudly made in the USA.

  • Long Lasting- 5 Year Warranty: These dehumidifiers are extremely strong and durable. Quest will back up your purchase with a 5-Year Warranty on the sealed system, and a 1-Year Warranty on Parts and Labor.

Included In Your Package

  • Quest Dual 150 Overhead Dehumidifier

  • Owners Manual

  • 2 Filter Doors

  • 4 Feet

  • 2 Compressor Plugs

  • 1 Drain Hose

  • 1 Drain Adaptor

Ducting Options

The Dual 150 can be ducted to suit an indoor grower. For optimal performance, we do not recommend ducting. However, there are the below options:

1. Ducted Return and Supply: Return dry, warm air back into your grow room or space with a ducted return and supply. Simply allow humid air to flow into the Quest inlet and duct the cool, dry air back out into the growing space. For optimal performance, be sure to draw in humid air from the ceiling.

2. Remote Area with Return Only: This method of dehumidification simply ducts humid air into the unit, and releases the dry, hot air into the isolated or remote room where the unit is located. (ex. in the crawlspace). Use this kit for this application.

3. Ducted Supply in Remote Area: Supply dry, warmer air back into the room without the dehumidifier in the space. Draw air from the same space as the unit, and release warm, dry air back into the grow space or greenhouse. Use this kit for this type of application.

Additional Add-On Options

We offer our customers additional add-on options if you so wish. In order to select your add-on options, use the drop-down menu by the "Add-To-Cart" button above.

1. Optional External Humidistat: You can choose the Remote wall mounted humidistat made by Honeywell. It is adjustable from 20%–80% RH humidity with positive On and Off settings. 

2. Optional Condensate Pump Kit: Condensate pump kit for the Quest Dual 110 and 150 models only. Kit includes pump, custom bracket that attaches to unit and flexible hoses. Pump requires 115 V outlet.

3. Standard replacement Filter: MERV-8 filter that measures 14 in x 17-1/2 in x 2 in. Fits Quest Dual 110 and 150 Dehumidifiers.

Duct Kits Are Available For Purchase Separately Here


Product Specifications

  • Industrial Use: Indoor Gardening / Greenhouse
  • Pint Capacity: 150 pints
  • Low Temperature Operation (41 degrees F and Under): No
  • Low Grain Refrigerant (LGR): No
  • Desiccant: No
  • Internal Condensate Pump: No
  • Auto-Restart: Yes
  • Color: Cream
  • Filter Type: MERV-8
  • Continuous Drain Capable: Yes
  • Drain Hose Diameter: 0.75 or 0.625 in.
  • Safety Certifications: ETL
  • Drain Hose Included: Yes
  • Wi-Fi Capable: No
  • Controls: Manual
  • Weight: 95 lbs.
  • Ductable: Yes
  • Drain Hose Length: 8 ft.
  • Bluetooth Capable: No
  • Water Container: No
  • Maximum Amperage: 11.6 Amps
  • Fan Operation Can Run Continuously or Only When Dehumidifying
  • Number of Fan Speeds: 1
  • Casters: No
  • Maximum Cubic Feet per Minute (CFM): 430 CFM
  • Depth: 26 in.
  • Energy Star: No
  • Full Bucket Indicator/Auto Shutoff: No
  • Maximum Wattage: 1300 W
  • Refrigerant Type: R-410A
  • Energy Factor: 2.29 L/kWh
  • Voltage: 110-120 V
  • Width: 14.5 in.
  • Height: 21 in.
  • Automatic Defrost: Yes
  • Power Cord Length: 10 ft.
  • Humidistat: Yes
  • Lowest Operating Temperature: 56 degrees
  • Number of Filters: 1

Free Shipping. Free Returns. All the time.

Order Confirmation:
As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase.  As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment.  If your item is on back-order or unavailable, we will void the pre-authorization and reach out to you via e-mail.  If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.
Order Shipment:
Usually, orders ship within If your order is stock and we process the charges to your credit card, it will ship within 1-3 business business days from the date of your order.  Depending on the supplier, it can take up to five business days for the order to ship. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, please follow up with us at
Customer service is everything to us. We want you to be 100% satisfied and that is why we placed an extremely easy returns process in place. Because we represent many different brands, please see below detailed return policy for each brand. For the brands that have return policies in place, we have a no-questions asked return policy based on their policy. 
Some brands also charge a re-stocking fee. This is an extra fee that they charge because they need to re-stock the item in their warehouse. If applicable, it is listed below by each manufacturer. GrowLight Heaven guarantees free returns even in these cases, so you have a risk-free purchase with free returns always.
Please note that in order to be eligible for a return and refund, the item must be unused and in it's original packaging, with all components present (cords, hangers, etc.)
Below are the return policies for each supplier:
  • Amare Technology: No Returns (unless damaged/defected)
  • Black Dog LED: 90 Day Returns (One return limit per customer)
  • California Lightworks: 90 Day Returns
  • G8LED: 90 Day Returns
  • GE Lighting: 90 Day Returns
  • The Green Sunshine Company: 100% refund & free return ship within 30 days, 120 day return policy w/ 15% restock fee
  • Gorilla Grow Tent: 30 Day Returns
  • Growers Choice: No returns (unless damaged/defected)
  • Kind LED: 90 days for K3 and K5 series; 30 days for bar lights. Only 2 Kind LED lights can be returned.
  • Mars Hydro: No returns (unless damaged/defected)
  • Matristar: 30 Day Returns with restocking fee
  • Spectrum King LED: 30 Day Returns
  • SuperCloset: 30 Day Returns
  • Toggled: No returns (unless damaged/defected)
  • TopGrow Lighting: No returns (unless damaged/defected)
  • TotalGrow: 90 Day Returns
  • Viparspectra: 30 Day Returns
Damaged/Defective/Incorrect Products:
If you receive a damaged, defective, or incorrect product(s), we will pay for the return shipping costs as well as pay for getting the product(s) to you. If damaged, please ensure you reject the item(s) and/or let the courier know that the product is damaged at delivery, otherwise a full refund may not be possible. GrowLight Heaven will not pay the return shipping charges for more than one product if it is not damaged/defective/incorrect. These shipping charges will be subject to the respective brand/companies prices and policy. Depending on where you live, the time it takes for your product(s) to reach you, may vary. Allow up to 2-3 weeks in rare cases.
In the event that the damged/defective/incorrect item was a gift, then please see below instructions regarding the gift scenario:
If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be mailed to you. If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a refund to the gift giver and he will find out about your return.
Cancellations & Refunds:
At GrowLight Heaven, we want our customers to be 100% satisfied with their orders. If you are not 100% satisfied with your order, you can AfteAll orders cancelled after 48 hours are subject to a $20 administration fee, whether or not your order has shipped.  If you order has shipped, you (the buyer) will also be responsible for actual return shipping charges. Refunds will only be issued to the original credit card that you use when placing your order.
Each brand that we work with has its own warranty that they stand behind. For your convenience, the length of the warranties for each brand are listed below:
  • Amare Technology: 5 year warranty
  • Black Dog LED: 5 year warranty
  • California Lightworks: SolarXtreme: 1 year warranty. SolarSystem: 5 year warranty
  • G8LED: 2 year warranty
  • GE Lighting: 5 year warranty
  • The Green Sunshine Company: 3 year warranty
  • Gorilla Grow Tent: 1 year warrany
  • Growers Choice: 3 year warranty
  • Kind LED: 3 year warranty
  • Mars Hydro:3 year warranty
  • Matristar: 3 year warranty
  • Spectrum King LED: 3 years on the light engine to retain 90% or better of its original light output and 5 years on all other materials and workmanship.
  • SuperCloset: 3 year warranty
  • Toggled: 6 Years/Lifetime- Depending on the product
  • TopGrow Lighting: 5 year warranty
  • TotalGrow: 5 year warranty

Best Price Guarantee means Best Price Guarantee.

At Grow Light Heaven, we work very hard to ensure that we offer the absolute best prices online.  If you find another online store that offers a lower price then us within six months of your purchase date please let us know and we will refund your original payment for the difference.  We want you to feel confident that you are getting the absolute best price for the product you are ordering.  If you find that our own website has a lower price for the same item you have ordered within six months of your purchase date will refund the difference as well.
To request your partial refund simply e-mail us a link to the same product on our website, or on our competitors website within six months from the date of your order and we will process the credit accordingly.
Our 100% Price Guarantee has some limitations:
  • You must purchase the item from our website before requesting your Price Match Guarantee
  • Promotions such as rebates and buy one, get one free offers are not eligible
  • The item must be in stock on the competitors website
  • The competitor must be an online store, they may not have a retail location
  • The website can not be a discounter or auction website (ie; eBay, overstock, etc..)
  • The competitor must be an Authorized Retailer of the product in question
  • The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax

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