Quest 155 Overhead Dehumidifier

The big brother to the Quest 70, the Quest Dual 155 is one of the most energy-efficient commercial dehumidifiers on the market today. This unit offers the flexibility to hang overhead or use ductwork and keep the dehumidifier in a different space entirely.

Like all Quest products, the Dual 155 is made in the USA using the very best components and materials available. This dehumidifier can remove up to 71 litres of water a day (3.74 litres/kWh @ 27°C, 60% RH), on a relatively low power demand.

Tried and tested in grow-room environments, Quest is a highly recognisable brand supporting horticultural operations in the USA. Quest expertise, efficiency and products deliver the most consistent and predictable grow room environments – critical for producing high-quality yields in the increasingly competitive CEA industry.



Able to handle high humidity in challenging grow-room environments. 

  • Alternative Grow environments: Hydroponics, Aeroponics, Tower gardens, Vertical farming, Aquaponics
  • Commercial grow operations
  • Controlled environment agriculture (CEA) facilities
  • Greenhouses and nurseries
  • Indoor farming
  • Seed warehouses and storage
  • Urban farming



  • Merv 13 filtration – captures dangerous airborne particles
  • Refrigerant dehumidification
  • Ductable – intake and exhaust kits are available
  • High efficiency performance
  • Insulated cabinet
  • Plug-and-play
  • Overhead or ground placement
  • 3 Year warranty
  • 3.74 litres/kWh



Water removal per day 71 L @ 26.7°C,60% RH
Power 800 W
Warranty 3 year
Air flow 705 m3/hr
Weight 61 kg
Dimensions (H x W x D) 56 x 96 x 51 cm


Download Spec Sheet



Why Choose Vertikit?

  • No bias and no bull. You'll always get a straight answer from our team on your best options, regardless of manufacturer.
  • Prepared for anything. Our collective history of working with both growers and industry means that whatever the size or complexity of your operation we'll have you growing in no time.
  • Vertikit source from many industries, we love to mix and match the best tech from a wide range of innovators from around the globe (yes, globe - we're scientists remember).

Real Industry Expertise

Don't be surprised to see the odd PhD knocking around our office. When you work with Vertikit you are choosing actual leaders of the field. We've got years of research experience and practical project knowledge to share.

Our Unique Approach

With our level of experience comes the ability to be really creative when it comes to product choices. Our curated product catalogue comes from the world's best suppliers of the specific technologies you need to succeed, regardless of whether they are farm-specific.