LEIZIG LG335 Dehumidifier – 335 Pints/Day – 480V

The LEIZIG LG335 Dehumidifier delivers 335 pints of moisture removal per day on a 480V three-phase circuit, making it a purpose-built solution for large commercial grow rooms and warehouse-scale cultivation facilities that already run three-phase power infrastructure. With built-in RS485 MODBUS communication, galvanized steel construction, and four flexible mounting configurations, the LG335 integrates directly into professional environmental control systems without requiring additional hardware.

LEIZIG LG335 Dehumidifier Specifications

The LG335 is rated at AHAM standard test conditions. The 480V three-phase variant is designed for facilities with industrial electrical infrastructure, delivering the same 335-pint removal capacity as the 208-277V single-phase variant but with the improved load balancing and amperage efficiency that three-phase power provides. The specifications below are sourced from Leizig product listings and retailer data confirmed across multiple sources.

Specification	Value
Dehumidification Capacity	335 pints/day (at AHAM standard conditions)
Energy Efficiency	6.8 pints/kWh
Airflow	900 CFM
Noise Level	70 dB(A)
Voltage / Phase	480V, three-phase
Communication Protocol	RS485 (MODBUS) — built-in standard
Remote Input	Dry contact input for external environmental controllers
Filtration	MERV-8 pre-filter / MERV-13 secondary filter (field-replaceable)
Construction	Galvanized steel with corrosion-resistant surface coatings
Installation Configurations	Ceiling-suspended, wall-mounted, floor cabinet, freestanding
Model	LG335
Supplier SKU	ENV-LEI-D335480

Physical dimensions, shipping weight, refrigerant type, and operating temperature range were not published in any publicly available source at the time of writing. The LG335 specs image available on the supplier page likely contains these details; contact the supplier or Leizig directly for dimensional drawings before planning a ducted installation.

Why Choose the LEIZIG LG335

The LG335 is aimed at operators who need reliable, large-scale moisture removal and who already have, or are specifying, a three-phase 480V electrical service. Here is what the research surfaced as the unit’s distinguishing characteristics compared to single-phase alternatives in the same capacity class:

• Native 480V three-phase compatibility. Most commercial dehumidifiers in the 300–400 pint range are designed for single-phase 208/230V circuits. The LG335 480V variant connects directly to three-phase distribution panels common in warehouse and industrial-converted grow facilities, eliminating the need for step-down transformers or dedicated single-phase sub-panels.
• MODBUS RS485 built in on every unit. Leizig ships the RS485 MODBUS interface as a standard feature, not an upgrade. This means you can wire the LG335 into a Trolmaster, IntelliClimate, Argus, or any MODBUS-compatible environmental controller on day one, with no aftermarket communication modules required.
• Dual-stage MERV-8/MERV-13 filtration. The two-stage filter stack — a MERV-8 pre-filter catching coarse particulates and a MERV-13 secondary filter handling fine particles including mold spores — protects the coil and internal components from the biological and chemical aerosols present in active grow environments. Filters are sized for quick field replacement and the manufacturer recommends inspection every 30–60 days.
• Corrosion-resistant galvanized steel housing. Grow rooms are chemically aggressive environments. The LG335 uses a galvanized steel enclosure with specially treated surface coatings engineered to resist corrosive substances, extending the service life of the unit compared to painted-steel alternatives that can develop rust pitting in humid, nutrient-spray conditions.
• Four installation configurations. The LG335 can be ceiling-suspended (hoisted), wall-mounted, set up as a floor cabinet, or used freestanding. This flexibility matters in retrofits and multi-room builds where ceiling clearance, floor space, or structural capacity varies by zone. It is also compatible with ducting systems for targeted delivery of dehumidified air to specific canopy zones.
• Industrial heritage and manufacturing experience. Leizig (LeiZig Climate) has been manufacturing industrial thermal management equipment since 1990, holds 10 invention patents plus 40 additional utility-model and appearance patents, and has a R&D team with a high proportion of advanced-degree engineers. Their products are deployed in demanding industrial environments including all 30 Budweiser production facilities in China.

Best Uses for the LEIZIG LG335

The LG335 480V variant is a specialty unit. Its three-phase power requirement means it is not suitable for smaller operations running residential or light commercial single-phase service, but it excels in the environments described below.

• Large commercial cultivation facilities with three-phase power. Warehouse conversions, purpose-built indoor farms, and vertical farming operations that have three-phase 480V service already distributed throughout the building can integrate the LG335 into existing electrical infrastructure without new transformer installations.
• Multi-room grow operations requiring centralized humidity management. Facilities running multiple flower rooms, veg rooms, and propagation areas benefit from a consistent, high-capacity dehumidification platform. The MODBUS interface allows a single environmental controller to monitor and adjust multiple LG335 units across zones from one dashboard.
• Facilities integrating VPD-based climate automation. The LG335 supports real-time VPD (Vapor Pressure Deficit) automation via its controller integration. Operators targeting tight VPD windows — typically 0.8–1.2 kPa during flowering — can have the environmental controller adjust dehumidification output in response to live temperature and humidity sensor readings.
• Ducted zone dehumidification. In large rooms where a single centrally placed unit cannot achieve uniform humidity distribution, the LG335’s ducting compatibility allows dehumidified air to be directed to defined canopy zones through duct runs, reducing humidity stratification across the canopy.
• Supplemental humidity control in large agricultural buildings. Greenhouse-attached processing buildings, large propagation bays, and commercial drying facilities running three-phase service can use the LG335 as a primary or supplemental dehumidification unit where the 335-pint removal rate is appropriately sized for the moisture load.
• Operations scaling up from smaller Leizig units. Growers already running the LG195 or LG228 models in smaller rooms who are expanding to larger rooms or moving to a new facility with three-phase power can stay within the Leizig ecosystem, reusing their MODBUS wiring conventions and controller configurations.

LEIZIG LG335 vs Quest 335 Dehumidifier

The Quest 335 is the most direct competitor to the LG335 in the 335-pint commercial dehumidifier class. Both units target large indoor cultivation rooms, but they differ in meaningful ways that affect which one is the right choice for a given facility.

Capacity and efficiency. The Quest 335 removes 345 pints/day at 80°F / 60% RH and achieves 8.2 pints/kWh efficiency. The LEIZIG LG335 removes 335 pints/day at AHAM conditions and is rated at 6.8 pints/kWh. The Quest 335’s higher efficiency rating means it will use less electricity to remove the same amount of moisture over time, which can represent meaningful savings in a facility running dehumidifiers around the clock. Operators in states with high electricity rates should factor efficiency into their total cost of ownership calculations.

Power supply requirements. This is where the LG335 480V has a clear advantage for a specific set of buyers. The Quest 335 is offered in 208/230V single-phase configurations and draws approximately 1,565 watts at those voltages. The LG335 480V connects to three-phase 480V distribution, which is the standard in industrial and warehouse buildings. If your facility has three-phase 480V panels, the LG335 plugs into existing infrastructure; running the Quest 335 would require a sub-panel or transformer to step down to single-phase — additional cost and a single point of failure.

Controls and integration. The Quest 335 features a variable-speed fan and filter compensation technology that adjusts performance as filter loading increases. The LG335 ships with RS485 MODBUS as a standard built-in protocol and dry contact inputs. If your environmental controller uses MODBUS natively, the LG335 integrates without additional hardware. The Quest 335 also offers controller integration but through its own control system.

Filtration. The Quest 335 uses MERV-13 filtration throughout. The LG335 uses a two-stage system with a MERV-8 pre-filter and MERV-13 secondary, which extends the MERV-13 element’s service life by catching coarser particles at the first stage. Both approaches protect the coil effectively in a grow-room environment.

Warranty and certifications. The Quest 335 carries a published 5-year warranty and is certified to California Title 24 requirements. Warranty terms and certifications for the LG335 were not available in publicly published sources at the time of writing; contact your supplier or Leizig directly to obtain current warranty documentation before purchasing.

Summary. If your facility runs single-phase power and energy efficiency is a top priority, the Quest 335 may be the stronger choice. If your facility has three-phase 480V infrastructure and you need a unit that connects directly to that service without additional electrical work, the LG335 480V is the purpose-built option in this capacity class.

Compatibility & Operating Range

The LG335 480V requires a dedicated three-phase 480V electrical circuit. This is a hard requirement, not a preference — the unit cannot be run on single-phase power or on voltages outside its rated input. Verify that your facility’s electrical service includes a three-phase 480V panel with available circuit capacity before ordering. Consult a licensed electrician to confirm available ampacity; the exact amperage draw for the 480V variant was not published in available sources, though three-phase efficiency typically means lower per-phase current than single-phase equivalents of the same wattage.

MODBUS and dry contact integration. The LG335 includes RS485 MODBUS built in, making it compatible with any commercial environmental controller that supports the MODBUS RTU or MODBUS TCP protocol over an RS485 bus — including Trolmaster Hydro-X Pro, IntelliClimate, Priva, and Argus systems. The dry contact input allows direct wiring to basic humidity controllers or relay-based triggers for simple on/off control without a full MODBUS setup.

Ducting. The LG335 is compatible with standard HVAC round and rectangular duct fittings for both inlet and discharge connections. Duct diameter and static pressure limits were not published in available specs; consult the LG335 technical documentation from Leizig for duct sizing guidance before designing a ducted installation.

Operating environment. The LG335 is designed for the chemically aggressive and high-humidity environment of active grow rooms. Its galvanized steel enclosure with corrosion-resistant coatings and dual-stage filtration make it suited for continuous operation in spaces where nutrients, pesticides, and biological aerosols are present in the air. Published operating temperature range was not available in sourced data; contact Leizig or your supplier for low-temperature and high-temperature operating limits before deploying in rooms with extreme climate swings.

Lineup context. The LG335 sits in the middle of the Leizig dehumidifier range. Below it are the LG195 (195 pints/day, 110–240V single-phase) and LG228 (228 pints/day, 240V or 208–277V). Above it are the LG508 (508 pints/day, 240V or 208–277V) and LG880 (880 pints/day, 480V three-phase). If your moisture load calculations call for a different capacity, Leizig’s lineup covers a wide range from small single-room installations to multi-room warehouse operations. If you are running a grow tent or smaller enclosed space, take a look at some of the smaller-footprint solutions we carry, such as the Grow Shop Outlet 48x48x78 grow tent, which pairs with a smaller dehumidifier more appropriately sized for that footprint.

Usage Guidelines

Sizing a dehumidifier for a grow room involves two calculations: the moisture load the room generates and the capacity the dehumidifier must remove to keep relative humidity within target range. The LG335 is rated at 335 pints per day under AHAM standard conditions (80°F, 60% RH inlet air). Real grow-room conditions vary, and actual removal rate will depend on your room temperature, incoming air humidity, and plant transpiration rate.

Estimating moisture load. Transpiration from plants is the dominant moisture source in a sealed or semi-sealed grow room. As a rough baseline, a mature cannabis plant in full flower can transpire 1–3 liters of water per day depending on canopy size, lighting intensity, and VPD target. A 335-pint (approximately 158-liter) daily removal capacity can theoretically service a room with a very large plant count, but real-world factors — room leakage, HVAC cycling, and incoming fresh air moisture — reduce effective capacity. Growers typically size dehumidification at 1.5–2x calculated moisture load to provide headroom during high-transpiration phases and to allow for filter fouling over time.

Target humidity and VPD settings. Most commercial indoor cultivation targets relative humidity in the 40–60% range during vegetative growth and 40–50% during flowering to reduce mold and powdery mildew risk. VPD targets typically fall between 0.8 and 1.2 kPa during flowering. When using the LG335 with a MODBUS-capable controller, configure the dehumidifier setpoint in the controller software rather than on the unit itself to allow the controller to adjust output based on live sensor readings.

Filter maintenance. The MERV-8 pre-filter should be inspected every 30–60 days and replaced when visibly loaded. A clogged pre-filter restricts airflow through the MERV-13 secondary element and reduces dehumidification efficiency. Keep replacement filters on hand to avoid gaps in filter coverage during maintenance windows. Log filter replacement dates so you can establish an accurate service interval for your specific environment — facilities with higher airborne particulate loads will need more frequent changes.

Condensate drainage. The LG335 removes moisture from the air by condensing it into liquid water. Ensure the condensate drain line is properly routed to a floor drain or sump, pitched continuously downward with no low spots that could trap water, and clear of obstructions. Blocked condensate drains can cause the unit to fault or overflow, potentially causing floor flooding in the grow room. Check and flush the drain line at each filter inspection.

Placement and airflow distribution. Position the unit so that its discharge air — or the ducted supply if ducting is used — is directed across the canopy evenly. Avoid placing the unit in a corner where recirculated air creates a dead zone on the opposite side of the room. In large rooms, two smaller units placed on opposite ends often achieve better humidity uniformity than one large unit placed centrally, but at 900 CFM, the LG335 moves a substantial volume of air that can be directed effectively with duct distribution.

How to Install the LEIZIG LG335

Published installation instructions for the LG335 480V were not included in the supplier listing or on the brand site at the time of writing. The steps below are based on standard commercial dehumidifier installation practices and the installation configurations described in Leizig product documentation. Always refer to the unit’s included installation manual and consult a licensed electrician before making electrical connections on a 480V three-phase circuit.

1. Plan the installation configuration. Decide whether the unit will be ceiling-suspended, wall-mounted, installed as a floor cabinet, or used freestanding. For ceiling-suspended installations, verify that the ceiling structure can support the unit’s weight (consult Leizig for weight specifications) and obtain the appropriate rated hoist hardware. For wall-mounted configurations, locate studs or reinforced wall sections and use appropriate lag hardware rated for the unit weight.
2. Rough in electrical service. Have a licensed electrician run a dedicated three-phase 480V circuit from your distribution panel to the unit location. The circuit must be sized to the LG335’s amperage draw plus a safety margin per NEC or local code requirements. Install a lockable disconnect within sight of the unit per code. Do not connect the unit to power until all other installation steps are complete.
3. Mount the unit. For ceiling-suspended installations, attach the mounting bracket or hoist points per the manufacturer’s hardware specification. Ensure the unit is level. For floor or wall configurations, position the unit so that its air inlet is unobstructed and its discharge is directed toward the target airflow path. Maintain minimum clearances around the unit per the installation manual for service access and airflow.
4. Connect condensate drainage. Route the condensate drain connection to a floor drain or sump using the appropriate drain hose diameter. Pitch the drain line consistently downward at minimum 1/4 inch per foot with no low points. Secure the drain line so it cannot be kinked or disconnected by vibration during operation. Test the drain path by pouring a small amount of water through the connection before commissioning.
5. Connect ducting (if applicable). If using the unit in a ducted configuration, connect the inlet and discharge duct collars using standard HVAC fittings and seal all duct joints with duct mastic or foil tape. Minimize duct run length and the number of bends to reduce static pressure and preserve airflow performance. Size duct runs based on the unit’s rated CFM and your system’s available static pressure budget.
6. Wire the control connections. Connect the RS485 MODBUS wiring to your environmental controller using a shielded twisted-pair cable. Follow the MODBUS wiring topology (daisy-chain with termination resistors at both ends of the bus) and your controller manufacturer’s wiring guide. If using dry contact control instead, connect the dry contact input terminals to the relay output of your humidity controller or timer.
7. Complete the electrical connection. Have the licensed electrician make the final 480V three-phase connection at the unit’s terminal block and at the disconnect. Verify that phase rotation is correct if the unit uses a compressor motor that requires a specific rotation direction (consult the installation manual). Torque all connections to specification.
8. Commission and test. Power on the unit and verify that the control panel displays correct operating parameters. Confirm MODBUS communication by checking that your environmental controller can read the unit’s sensor and status registers. Set the target humidity setpoint in your controller. Run the unit through a full dehumidification cycle and verify that condensate is flowing to the drain correctly. Check for abnormal vibration or noise during the first operating hour.

For reference on other grow-room equipment commissioning, including lighting setup such as the Sun Blaze T5 HO fixture or the Eye Hortilux 600W ceramic HPS bulb, see the respective product pages for installation and positioning guidance.

Sources & Further Reading