Quest Dual 165 Overhead Dehumidifier - 220-240V

At only 3.4 amps, the Quest Dual 165 is one of the most energy-efficient commercial dehumidifiers on the market today. Removing 165 pints of water per day, this unit saves thousands in energy costs every year compared to the competition. Designed with flexibility to hang overhead or ducted the 165 is ideal for efficient commercial growing.

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Commercial & Large Grow Operations

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Additional Information

Name Quest Dual 165 Overhead Dehumidifier - 220-240V
Brand Quest
SKU 700945
UPC 859029004977
Weight (lbs) 140
Warranty Compressor 5 year, Parts 1 year
Dimensions 20.25" x 21.75" x 37.88"
Watts 980w
Voltage 220-240v
Amps 4.1A
UL Listed Yes
ETL Listed Yes
MSRP $2,370.95
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Quest Dual 165 is in fact the industry's first 230 volt commercial dehumidifier! Like all Quest products you have the option of placing it ground level for plug and play operation or hung overhead up and out of the way.

The Dual 165 is one of the most energy efficient dehumidifiers out right now performing using minimal amps (4.1) and maximum efficiency (6.8 pints/kWh).

Made in the USA for highest safety and environmental standards

The Quest Dual 165 is UL-listed and ETL certified. Manufactured in the USA and built to last, it comes with a five-year powertrain warranty. The Dual 165 uses environmentally-friendly R410A refrigerant. Created using high environmental standards allows the Quest Dual 165 to create reusable water that's safe to use on consumable plants.

Produces Reusable Water

Quest dehumidifiers produce very low TDS water with neutral pH. This water is safe to reuse for all plants, even consumable ones. (With Best Practices)

Best Practices to Reuse Condensate Water

Run your dehumidifier if it's been idle first
If your dehumidifier has been sitting idle, run it for three days before using any condensate water from it. (Dehumidifiers that are allowed to sit for more than a couple of days should be dried out as completely as possible, to discourage mold growth.)

Test condensate: Be sure it's free of contaminates
Contaminate levels should be low enough and well within acceptable limits as long as your dehumidifier is in good working order and has proper filtration. It is always a good idea to test condensate water for heavy metals, nitrates, and bacteria – and state law may require you to if you are a commercial grower.

Keep your dehumidifier and filter clean
Quest dehumidifiers will produce condensate water that can be used as-is, as long as you keep the filter in place and clean regularly. Dust, bacteria, and other pollutants can contaminate condensate water if the dehumidifier's filter is absent or not maintained properly.

Keep your dehumidifier running continuously and recycling water
Why? Because just using and reusing condensate water over and over again keeps it clean. Only if you always use a high-quality, clean air filter during operation, the constant recycling of the dehumidifier's condensate water discourages mold growth. Keep the filter in place, and follow the filter guidelines for it; clean or replace the filter as directed.


  • 165 pints per day at 80°F/60% RH
  • 4.1 amps
  • 230V Power with 24V pigtail control wiring
  • 6.8 pints/kWh
  • 24V control
  • Proudly made in the USA

Blower (with dust collars on):
391 CFM @ 0.0” WG
363 CFM @ 0.2” WG
337 CFM @ 0.4” WG
Power (Watts): 980
Supply voltage: 220-240 VAC - 1 Phase - 60 Hz.
Current Draw (Amps): 4.1
Energy Factor: 3.2 L/kWh
Operating Temp: 56°F - 95°F
Water Removal (Pints/Day): 165
Efficiency (Pints/kWh): 6.8
Air Filter (MERV-11 Nominal): Size: 16" x 20" x 2"
Power Cord: 10’ 14/3 SJTW w/6-15P Plug
Drain Connection: 3/4” Threaded NPT
Refrigerant Type: R410A
Refrigerant Amount: 2lb. 3oz.

Dimensions: Unit Shipping
Width: 20.25" 25"
Height: 21.75" 29"
Length: 37.88" 42"
Weight: 140 lbs 160 lbs

Warranty: 1 year parts and labor. 5 year compressor and refrigerant system. GrowersHouse has no role in providing technical support or warranty fulfillment on Quest Dehumidifiers. Contact Quest directly for service or support.

There is an optional condensate pump and ducting kit that provides the most in flexibility for challenging space restrictions and specialized applications. MERV-11 filtration is standard on these units, capturing particles (including mold spores) down to 1 micron in size.