Take control of humidity in your grow space with the Quest 70 Overhead Series Dehumidifier. Engineered for small-to-mid-size commercial environments, this compact powerhouse delivers 70 pints of moisture removal per day with industry-leading efficiency — so your plants thrive, your energy bills stay manageable, and your environment stays dialed in.
Why Quest 70
The Quest 70 stands apart from conventional dehumidifiers by combining commercial-grade performance with a compact overhead-mount design. While portable consumer units struggle with temperature swings and limited placement options, the Quest 70 is purpose-built for unconditioned commercial spaces — grow tents, greenhouses, and cultivation rooms where consistent humidity control is non-negotiable.
Engineered in Madison, Wisconsin and backed by a 5-year warranty, the Quest 70 meets California Title 24 requirements for both ducted (whole-home) and non-ducted (portable) installations. With one of the widest temperature and relative humidity operating ranges in the Quest lineup, it performs reliably where other units fall short.
Key Benefits
- High-Capacity Moisture Removal – Removes up to 70 pints (8.75 GPD) of moisture per day to maintain optimal grow room humidity.
- Exceptional Energy Efficiency – Rated at 5 pints/kWh, delivering more dehumidification per dollar of electricity than most competitors.
- Overhead Mounting Design – Saves valuable floor space and promotes even airflow distribution throughout the canopy zone.
- Wide Operating Range – One of the broadest temperature and RH operating ranges in the Quest lineup, ideal for variable-climate environments.
- California Title 24 Compliant – Meets requirements for both ducted and non-ducted installations, ensuring regulatory peace of mind.
- 5-Year Warranty – Backed by Quest's industry-leading warranty for long-term reliability and investment protection.
- ETL Listed – Safety-certified for commercial and residential use.
Use Cases
- Indoor Grow Rooms – Maintain precise VPD targets during vegetative and flowering stages to maximize yield and prevent mold.
- Grow Tents – Overhead mounting keeps the footprint small while delivering consistent humidity control in enclosed tent environments.
- Commercial Greenhouses – Handle the humidity loads of plant transpiration in small-to-mid-size greenhouse operations.
- Propagation Rooms – Protect cuttings and seedlings from excess moisture that can cause damping-off and root rot.
- Drying Rooms – Dial in post-harvest drying conditions for consistent cure quality and terpene preservation.
- Unconditioned Commercial Spaces – Ideal for warehouses, storage areas, or any space where HVAC humidity control is limited or absent.
Directions for Use
- Mount the unit overhead using the included hardware, ensuring adequate clearance for airflow intake and exhaust.
- Connect to a standard 120V / 60Hz outlet (5.1A draw — verify circuit capacity before installation).
- Set the target relative humidity using the onboard controls based on your crop's VPD requirements.
- Connect a drain hose to the condensate outlet for continuous drainage, or use the internal reservoir if continuous drainage is not available.
- Check and clean the air filter regularly (every 2–4 weeks in high-particulate environments) to maintain peak efficiency.
- Monitor ambient temperature — the Quest 70 performs optimally within its rated operating range; avoid placement near direct heat sources.
Specifications
- Capacity: 70 Pints/Day
- Efficiency: 5 Pints/kWh
- Voltage: 120V / 60Hz
- Current Draw: 5.1 Amps
- Rated Wattage: 580W
- Rated BTU/Hr: 5,000
- Airflow: ~150 CFM @ 0.0 SP
- GPD: 8.75 | GPH: 0.36
- Dimensions: 28"L × 12"W × 12"H
- Weight: 65 lbs
- Color: White
- Certifications: ETL Listed, California Title 24 Compliant
- Warranty: 5 Years
What Growers Are Saying
"The Quest 70 has been a game-changer for our flowering rooms. Humidity stays locked in and we've seen a noticeable reduction in mold pressure since switching."
— Marcus T., Commercial Grower
"Overhead mounting freed up so much floor space. Installation was straightforward and it's been running flawlessly for months."
— Sarah P., Greenhouse Grower
"The efficiency rating is no joke — my energy costs dropped noticeably after replacing my old unit with the Quest 70. Highly recommend."
— Daniel R., Home Grower
Frequently Asked Questions
What size grow room is the Quest 70 designed for?
The Quest 70 is ideal for small-to-mid-size commercial spaces and grow rooms up to approximately 500–800 sq ft, depending on heat load, plant density, and ambient conditions.
Can the Quest 70 be ducted?
Yes. The Quest 70 supports both ducted (whole-home) and non-ducted (portable) installations and meets California Title 24 requirements for both configurations.
What voltage and outlet does the Quest 70 require?
It operates on standard 120V / 60Hz power with a 5.1A current draw. A dedicated 15A circuit is recommended for continuous operation.
How do I drain the condensate?
The Quest 70 supports continuous gravity drainage via a standard drain hose connection. This is the recommended setup for unattended commercial operation to avoid overflow.
How should I store the unit during off-season?
Store in a clean, dry location. Drain all condensate, clean the filter, and cover the unit to prevent dust accumulation. Avoid storage in freezing temperatures.
What warranty does the Quest 70 carry?
The Quest 70 is backed by Quest's industry-leading 5-year warranty, covering manufacturing defects and component failures under normal operating conditions.
More about Quest 70 Overhead Series Dehumidifier, 120V:
Description
Specifications
Length: 28 Inches
Height: 12 Inches
Width: 12 Inches
Weight: 65 Lbs
Unit: Each
UL Registration: (ETL)
Rated Amperage (A): 5.1
Rated BTU Per Hour: 5000
Rated GPD: 8.75
Rate GPH: 0.36
Rated Wattage: 580
Frequency: 60
Voltage: 120
ETL Registration: Yes
Approximate CFM @ 0.0 SP: 150
Color: White
