Quest Dehumidifiers & Accessories
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EFB005 MERV-13 Replacement Filter - 20" x 18" x 2" - Compatible with Quest 506 (Case of 12) -
EFB007 MERV-11 Replacement Filter - 20" x 16" x 2" - Compatible with Quest 105, 155, 165, 205, 225 (Case of 12)
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EFB028 MERV-13 Replacement Filter - 22" x 20" x 2" - Compatible with Quest 335 (Case of 12)
Details
Quest dehumidifiers are the industry standard for high-capacity, energy-efficient moisture control in commercial and horticultural environments. Designed and built in the USA, the Quest product line spans from compact 70-pint units to powerful 876-pint machines—delivering reliable humidity management for grow facilities, greenhouses, warehouses, and other demanding applications.
Core Features Across the Line
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High-Capacity Performance: With capacities from 70 to 876 PPD (pints per day), Quest offers targeted solutions for every environment size, from small rooms to large-scale commercial grows.
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Energy Efficiency: Many Quest models lead the category in moisture removal per kWh, helping operators reduce utility costs and meet sustainability benchmarks.
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Versatile Installation: Units are available in freestanding and overhead configurations with flexible ducting options, making integration seamless regardless of space constraints.
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Robust Construction: Designed for continuous operation in tough conditions, Quest dehumidifiers feature durable chassis, corrosion-resistant coils, and washable filters for long-term reliability.
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Precise Environmental Control: High static pressure ratings, integrated humidistat options, and optional digital controls allow for fine-tuned environmental regulation.
Product Range Overview
| Model | Capacity (PPD) | Airflow (CFM) | Power (W) | Voltage | Dimensions (in) | Weight (lb) |
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| Quest 70 | 70 | 150 | 580 | 115V | 9 × 12 × 1 | 55 |
| Quest 100 | 105 | 280 | 540 | 115V | 12 × 14 × 1 | 60 |
| Quest Dual 110 | 110 | 365 | 787 | 115V | 14.5 × 19.4 × 26 | 85 |
| Quest Dual 150 | 150 | 430 | 1300 | 115V | 14.5 × 21 × 26 | 95 |
| Quest Dual 155 | 155 | 500 | 750 | 115V | 26.8 × 20.9 × 23.6 | 130 |
| Quest Dual 205 | 205 | 526 | 1525 | 120V | 20.25 × 21.75 × 37.88 | 150 |
| Quest Dual 225 | 225 | 526 | 1500 | 220–240V | — | 160 |
| Quest 225 | 225 | 630 | 1230 | 208/230V | 26.8 × 20.9 × 23.6 | 130 |
| Quest 335 (240V) | 345 | 900 | 1700 | 277V | 20 × 22 × 2 | 215 |
| Quest 335 (277V) | 345 | 900 | 1700 | 277V | 20 × 22 × 2 | 215 |
| Quest 506 (277V) | 500 | 1150 | 2250 | 277V | 44.7 × 27.4 × 29 | 275 |
| Quest 506 (240V) | 506 | 1350 | 2700 | 220–240V | 44.8 × 28.9 × 29.0 | 280 |
| Quest 746 | 746 | 1750 | 4300 | 480V 3ϕ | 44.8 × 28.9 × 29.0 | 340 |
| Quest 876 | 876 | 1850 | 5500 | 230V | 44.8 × 28.9 × 29.0 | 340 |
Applications
Quest dehumidifiers are ideal for:
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Indoor cultivation
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Controlled environment agriculture (CEA)
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Dry storage and warehouse operations
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Food processing and specialty manufacturing
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Commercial and industrial drying systems
Why Quest
Trusted by growers and commercial operators nationwide, Quest dehumidifiers combine rugged performance with unmatched efficiency and flexibility. Backed by strong technical support and a leading warranty program, Quest products are built for the long haul—and built in the USA.