VPD-Optimized Climate Control for Maximum Yield
Anden engineered every dehumidifier specifically for horticulture environments where standard HVAC equipment fails. The challenge isn't just removing moisture—it's maintaining the 0.8-1.2 kPa VPD range that drives transpiration without triggering stress responses. VLGR technology solves this by extracting moisture efficiently while minimizing temperature fluctuations that destabilize atmospheric conditions.
VLGR Technology Delivers Precision Moisture Control
Variable Low Grain Refrigerant technology represents Anden's core advantage over generic dehumidifiers. This system removes moisture at low temperature differentials, preserving the stable climate required for optimal VPD throughout all growth phases.
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Consistent VPD Across Growth Stages: Standard dehumidifiers cycle aggressively, creating temperature swings of 5-8°F that push plants outside optimal VPD ranges. The
A320 V3 with VLGR maintains stable extraction, removing up to 340 pints daily while preserving the narrow climate band that maximizes photosynthetic efficiency.
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Late-Flower Performance: When flower density peaks and transpiration drops, traditional units struggle to extract the remaining moisture without overcooling. Anden units respond with precise modulation—the digital interface allows growers to dial in exact humidity targets and monitor real-time removal rates.
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Flexible Installation Options: Every model supports suspended, freestanding, or ducted configurations. The
A210 V1 delivers 525 CFM airflow that integrates seamlessly with HVAC ducting, eliminating hot spots and maintaining uniform conditions across large canopies.
Size Your System to Match Cultivation Scale
Proper dehumidification capacity prevents the two most common failures: undersized units that run continuously without achieving targets, and oversized systems that short-cycle and waste energy. Calculate requirements based on plant count, canopy density, and late-flower transpiration rates.
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Small Tents and Personal Grows (70-130 Pints/Day): The
A70 handles concentrated 4x4 spaces where a single light generates moderate moisture loads. For 5x5 to 8x8 tents during late flower, the
A130 prevents the humidity creep that triggers powdery mildew in dense canopies. Both units feature intuitive digital interfaces for quick setpoint adjustments.
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Medium Commercial Operations (210-340 Pints/Day): Multi-light rooms require commercial-grade capacity. The
A210 V1 removes 210 pints daily with MERV 11 filtration and 2.9 liters per kilowatt-hour efficiency. Step up to the
A320 V1 for larger facilities—863 CFM airflow provides the circulation needed for 10-20 light rooms where stagnant air creates microclimate variations.
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Large-Scale Facilities (710 Pints/Day): When managing warehouse-scale cultivation, the
A710 V1 becomes essential infrastructure. Available in 208-240V or 277V configurations, these units handle the extreme moisture loads generated by dense canopies under hundreds of lights. Pair with
environmental controllers for automated VPD management across multiple zones.
Optimize Performance Through Strategic Integration
Installing powerful dehumidifiers doesn't guarantee proper climate control. Effective systems combine adequate capacity with intelligent placement, proper drainage, and complementary airflow.
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Position for Uniform Coverage: Suspended installation places dehumidifiers at canopy height where transpiration occurs, preventing the stratification that creates humid pockets near dense flowers. Ducted configurations distribute dry air evenly, eliminating the hot spots and cold zones that stress plants and create uneven VPD across the grow space.
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Maintain Continuous Drainage: All Anden units support gravity drainage or pump connections. During peak flower when plants can transpire 2-4 gallons per light daily, manual reservoir emptying interrupts climate control and risks overflow. Connect drain lines directly to waste systems for uninterrupted operation.
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Supplement with Humidity Addition: VPD management requires bidirectional control. When late-flower dehumidification drops RH too low during dark periods, the
AS150 Steam Humidifier adds up to 1,200 pints daily through clean electrode technology. The Vapor-logic controller enables web-based RH management across both humidification and dehumidification equipment.
Precise climate control separates high-yield facilities from operations that struggle with mold, hermaphroditism, and inconsistent quality. Anden's grow-optimized engineering addresses the specific challenges cultivation environments present. Compare dehumidifier capacity options and installation configurations across
all grow room climate control equipment.
Frequently Asked Questions
What makes Anden dehumidifiers better for cultivation than standard HVAC units?
Anden units use VLGR (Variable Low Grain Refrigerant) technology engineered specifically for maintaining stable VPD in grow environments. Standard dehumidifiers cycle aggressively, creating 5-8°F temperature swings that destabilize atmospheric conditions. VLGR extracts moisture at low temperature differentials, preserving the narrow climate band required for optimal transpiration. The digital interfaces provide precise humidity targeting rather than the wide deadbands found in residential equipment, and all models support suspended, ducted, or freestanding installation to match cultivation facility layouts.
How do I calculate the right dehumidifier capacity for my grow space?
Calculate based on light wattage, plant count, and growth stage. A general baseline: 50-70 pints per day capacity for each 1000W of lighting during vegetative growth, increasing to 80-120 pints per 1000W during peak flower when transpiration maximizes. Dense canopies under LED produce higher moisture loads than sparse plants under HPS. For a 4x4 tent with 480W LED and moderate plant density, the A70 (70 pints/day) handles vegetative stages while the A100 or A130 prevents late-flower humidity spikes. Commercial facilities should size for peak flower loads then run units at partial capacity during veg to maintain efficiency.
What's the difference between V1 and V3 versions of Anden dehumidifiers?
The primary difference is voltage configuration. V1 models operate on standard 208-240V power commonly found in commercial buildings, while V3 versions run on 277V—the voltage supplied by 480V three-phase systems when using a single phase to neutral. If your facility already has 277V circuits for commercial lighting, the V3 models integrate directly without requiring transformers. Both versions deliver identical moisture removal capacity and VLGR performance; voltage compatibility determines which model fits your electrical infrastructure.
Can Anden dehumidifiers operate in cold environments like sealed CO2 rooms?
Yes, VLGR technology performs effectively at the lower temperatures common in sealed rooms running CO2 enrichment (68-75°F). Traditional dehumidifiers struggle below 65°F as refrigerant efficiency drops and coils freeze. Anden units maintain consistent extraction down to temperatures that would incapacitate standard equipment. However, during lights-off periods when rooms drop into the 60s, consider cycling dehumidification with lighting schedules or using the units' built-in defrost modes if temperatures approach the lower operating limits.
How does VPD relate to humidity control during different growth stages?
VPD (Vapor Pressure Deficit) measures the difference between moisture in the air and moisture plants can hold internally—essentially the driving force for transpiration. Seedlings thrive at 0.4-0.8 kPa (higher humidity, 65-75% RH), vegetative growth optimizes at 0.8-1.2 kPa (55-65% RH), and flowering requires 1.0-1.5 kPa (45-55% RH) to prevent mold while maintaining nutrient uptake. Anden dehumidifiers maintain these precise humidity targets as temperature fluctuates throughout the day. The digital interfaces allow growers to adjust setpoints as plants transition between stages, ensuring VPD remains in the optimal range for each phase.
Should I install my dehumidifier suspended, freestanding, or ducted?
Suspended installation at canopy height provides the best performance for most grows, placing moisture extraction where transpiration occurs and preventing stratification. Ducted configurations work best for large rooms where a single unit needs to serve multiple zones—the high CFM output on models like the A210 and A320 supports ductwork that distributes conditioned air evenly. Freestanding placement suits smaller operations where floor space isn't constrained and mobility benefits seasonal repositioning. For commercial facilities, suspended or ducted installation maximizes floor space for plant canopy while eliminating the floor-level cold zones that freestanding units create.
What maintenance do Anden dehumidifiers require?
Weekly maintenance includes checking and cleaning air intake filters—clogged filters reduce efficiency by 30% or more. Monthly tasks involve inspecting drain lines for clogs and verifying condensate drainage flows properly. Quarterly or between grow cycles, clean condenser coils with approved HVAC coil cleaner to maintain heat exchange efficiency. The MERV 11 filters on commercial models should be replaced every 2-3 months in heavy-use environments, more frequently if operating in dusty conditions. Unlike residential dehumidifiers, Anden units use sealed refrigerant systems that don't require periodic recharging under normal operation.
Can I use multiple smaller dehumidifiers instead of one large unit?
Yes, distributed dehumidification often performs better than centralized capacity in large or irregularly shaped spaces. Multiple A130 or A210 units positioned throughout a facility eliminate the hot and cold zones that single large units create. This approach also provides redundancy—if one unit fails during critical late flower, the remaining capacity prevents catastrophic humidity spikes. However, distributed systems require more installation labor, additional electrical circuits, and coordinated setpoint management. For rectangular rooms under 2,000 square feet, a single appropriately sized unit with proper airflow usually delivers better cost-efficiency than multiple smaller units.
