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Quest Dual 105 Overhead Dehumidifier

In stock


Contact us at [email protected] or (707) 588-8844 for freight quote.

Quest Dual 105 Overhead Dehumidifier

Contact us at [email protected] or (707) 588-8844 for freight quote.

The Quest Dual 105 is the world’s most energy efficient dehumidifier: Using only 4.9 amps, the Quest Dual 105 removes 105 pints of water per day. It gives you the flexibility to hang the unit overhead or use ductwork and keep the dehumidifier in a different space entirely.

MERV 11 Filtration

Captures dangerous airborne particles


Intake and exhaust kits are available

UL Rated And ETL Listed

The highest safety standard

High Efficiency Performance

No dehumidifier is more efficient

Insulated Cabinet

For quieter operation


Quest Duals require no installation

Overhead Or Ground Placement

Built to fit what works for your space

Made in the USA

Built to last

Supply fresh, dry air to your indoor grow room, warehouse, or greenhouse with the Quest Dual 105 Overhead Dehumidifier. The Quest 105 is a versatile and money-saving overhead dehumidifier that can also be on the ground.

Its onboard dehumidistat carefully monitors humidity in the room while the Quest 105 removes 105 pints of water at standard AHAM (80 F/60% RH) conditions to prevent structure damage and mold accumulation on plants. Other features include the option to daisy chain up to six models together, efficient and money-saving design, and multiple set up and ducting options.

Onboard Dehumidistat for Improved Humidity Control

This overhead Quest unit has an onboard dehumidistat and operates via three humidity levels – dry (20% - 30% RH), normal (50% RH), and humid (80% - 90% RH).

When your humidity levels rise above your pre-set, the dehumidifier will automatically start, running until the humidity levels drop 4% - 6% below your presets. Once this is achieved, the unit will automatically shut down.

Ducting Options

As with any dehumidifier, the Quest 105 can be ducted to suit an indoor grower. For optimal performance, no ducting is recommended for the dehumidifier. However, there are other options for ducting:
  • Ducted Return & 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.
  • 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). A Quest return collar can added for this application.
  • 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. A Quest supply collar can added for this application.

Easier Moisture Removal

Humidity can happen anywhere–not just next to a floor drain. Add the Quest Universal Condensate Pump move moisture horizontally and vertically. It offers the easiest moisture removal available and mounts directly to the unit, increasing flexibility in where your dehumidifier can be installed. The pump features a low profile to fit the unit's horizontal design. It is long-lasting, unobtrusive, and provides multiple options for the location of the dehumidifier.

Plug & Play Overhead + Floor Installation

Unlike traditional dehumidifiers, the Quest 105 can be mounted overhead, freeing up floor space for a variety of growing needs. This installation can be completed via 2 Quest hanging brackets and chains.

While overhead installation is recommended, the Quest 105 can easily be installed on the ground floor for growers whose needs may change on a day-to-day basis. Simply place the dehumidifier on the ground with a 2.5” clearance between the bottom of the unit and the ground for sufficient gravity drainage of condensate.

When installing on the ground level, allow for 2.5” clearance between the bottom of the unit and the ground for gravity draining of condensate.

Additional Features:

  • Daisy Chain Option:

    Wire up to six of these models together for use in large warehouse spaces. All six will be running off the same sensor on the Quest DEH 3000 R, so all models must be in the same room.
  • Fan Only Runs When Dehumidifying:

    The fan only runs when the compressor is running and the unit is dehumidifying.
  • Low Amps:

    Low amp usage of 4.9.
  • Operation Temperature:

    Operates in temperatures between 56 – 95 degrees Fahrenheit.
  • MERV 11 Filter:

    The MERV 11 removes particles as small as 1 micron.
  • Gravity Drain:

    Can be drained via gravity drain to an outside source or acceptable indoor drain.
  • Dual Exhaust Vents:

    Dual exhaust vents allow for capturing more air and ducting options.
  • Auto Restart:

    During a power outage, the unit will automatically resume operation.
  • Simple Wiring:

    Featuring a low voltage terminal block, the Quest 105 is simple to wire to an external control such as the Honeywell H46C 1166 Wall Mounted Humidistat.


More Information
SKU cc_ac_104
UPC 859029004236
Manufacturer Part Number 4032270
Distributor Part Number HGC700819, 700819