Commercial Dehumidifier | Manufacturer 50–156 L/day

Core Engineering Features Across Our Dehumidifier Range

The four features below are standard across our compressor dehumidifier series. Specifications vary by model — refer to each product page for the exact configuration.

All-Copper Condenser and Evaporator in Thickened Sheet Metal Housing

Both the condenser and evaporator in the GDH commercial portable range and the GDH-CE ceiling-mounted range use copper tubing. Copper provides higher thermal conductivity than aluminum and better resistance to corrosion under the continuous high-humidity operation typical of commercial dehumidifiers. Cabinets are fabricated from thickened sheet metal at our Jiaxing facility with moisture-proof surface treatment, suitable for tropical, coastal, and basement environments. The GDH-CE ceiling-mounted series adds titanium foil fins on the coil for chemically active environments such as indoor pools and kitchen back-of-house.

LCD Touchscreen Control with Intelligent Humidity Sensing

All commercial models ship with an LCD touchscreen control panel and a built-in humidity sensor for real-time monitoring and target humidity setting. Operators set the target RH, operating mode, and timer functions directly on the panel. The same control board and humidity sensor used on our larger industrial GDH and GDH-CE range are fitted to the commercial models — interface and field service procedures are consistent across the entire dehumidifier catalog.

Automatic Defrosting and Continuous Drainage

All compressor dehumidifiers in the commercial range include automatic defrosting to prevent frost buildup on the evaporator coil during low-temperature operation. Drainage is by water tank with optional drain hose on the smaller GDH portable units, and by direct continuous hose drainage on the GDH-CE ceiling-mounted range — suitable for unattended 24-hour operation in basements, server closets, and ducted ceiling installations.

Fault Self-Protection

Each commercial unit includes fault self-protection circuitry covering compressor overload, refrigerant leakage detection, electrical leakage protection, and water-overflow shutoff on water-tank models. These protections are standard across the GDH and GDH-CE commercial range and match the protection profile on our larger industrial units.

Our Commercial Dehumidifier Range

We manufacture four series of dehumidification equipment, organized by application and installation type. Click any series below to view full model specifications.

Series

High Capacity Dehumidifier (GDH-156E)

Capacity & Application

The GDH-156E is a high capacity dehumidifier delivering 156 L/day extraction in a two-wheel handle-cart format. 49 kg net weight, 520 × 630 × 1260 mm cabinet, 1800 W rated power, 1200 m³/h airflow, and recommended coverage of 140–160 m².

Series

Indoor Swimming Pool Dehumidifier (GDH-60E / 90E / 138E / 156E Anti-Corrosion)

Capacity & Application

60-156 L /day. 220V / 50Hz. It features a hassle-free direct drain and a premium, chlorine-resistant stainless steel cabinet with a 100% copper condenser for ultimate rust protection. Enjoy smart, zero-maintenance humidity control for heavy-duty spaces. Model: GDH-60E,90E,138E,156E.

Series

GDH-CE Ducted Dehumidifier Series (GDH-CE90 / CE138 / CE156 / CE168)

Capacity & Application

90-168 L/day. 220V/50V. Concealed ceiling installation; ideal where floor space is limited. Direct hose drainage. Models: GDH-CE90,CE138,CE156,CE168

Series

Compact Desiccant Dehumidifier

Capacity & Application

Capacity 0.8-0.83 kg/h. Voltage 220V. Target Archives, precision storage and cool process rooms. This compact desiccant dehumidifier bridges the gap between portable and industrial units, delivering efficient deep drying down to -20°C with plug-and-play setup and a G4 pre-filter. Models: XR-200XF-01 / XR-200XF-02 / XR-200XF-03.

In addition to dehumidifiers, we also manufacture:

• UH-DS Ultrasonic Humidifiers (2 kg/h to 30 kg/h) — UH-DS-02E through UH-DS-30E

• DXHW Floor-Standing Temperature & Humidity Control Unit (2 kg/h to 20 kg/h) — DXHW-3 through DXHW-70

• DXSL Integrated Humidifier & Dehumidifier Units (3 kg/h to 40 kg/h) — DXSL-60 through DXSL-480

Applications We Serve

View All Applications →

Commercial Basement Dehumidifier

Commercial basements — under retail buildings, restaurants, office towers, gyms — accumulate moisture from infiltration through foundation walls, condensation on cold surfaces, and lack of air exchange. Sustained humidity above 65% RH drives mold growth and structural decay. For a typical 100–200 m² commercial basement, a GDH-90E or GDH-138E with continuous drain hose is the standard specification.

Crawl Space Dehumidifier

Crawl space dehumidification is a major application in North American climates — moisture from soil and infiltration causes wood rot, pest entry, and air quality issues in living spaces above. For an encapsulated crawl space (with 6-mil vapor barrier installed on ground and walls), a 50–90 L/day commercial unit typically maintains 50–55% RH. If your crawl space is not encapsulated, expect to size up — moisture infiltration without a vapor barrier can exceed the capacity of an undersized unit.

Warehouse Dehumidifier

Warehouses up to about 200 m² floor area, single-zone, with normal ceiling height fall into commercial dehumidifier capacity range. Above this size, or with double-height ceilings, move to industrial floor-standing units (180 L/day and up). For mixed inventory warehouses, target 50–60% RH to prevent corrosion on metals and mold on cardboard packaging.

Garage and Workshop

Garage applications — vehicle storage, small workshops, restoration shops — see high search volume because garage humidity damages stored equipment and accelerates rust on tools and parts. A GDH-60E or GDH-90E with continuous drainage routed to a floor drain handles a typical 60–100 m² garage. Ambient temperature in unheated garages can drop below 5°C in winter, at which point compressor dehumidifier performance falls off — if your garage sees winter temperatures below 5°C regularly, consider a desiccant dehumidifier instead.

Switchgear Room and Server Closet

Electrical equipment rooms and small server closets need humidity control to prevent condensation on cold metal surfaces (relays, busbars, server chassis). Target 40–60% RH. Compact ceiling-mounted GDH-CE units are common here because floor space is often occupied by equipment racks.

Archives, Document Storage, Wine Cellar

Document archives, museum back-of-house, and commercial wine storage typically target 45–55% RH with tight tolerance. The selection here is less about capacity and more about control precision — a smaller commercial unit (GDH-50E or GDH-CE38) running with a precise humidistat is usually preferable to an oversized unit short-cycling.

Retail Back-of-House and Stockroom

Retail back-of-house, stockrooms, and supply closets in office and commercial buildings face seasonal humidity that affects packaging, paper goods, electronics, and stored consumables. A GDH-58E or GDH-90E with continuous drain hose handles a typical 60–150 m² stockroom. For retail spaces where the dehumidifier must be hidden from customer-facing areas, the GDH-CE ceiling-mounted range installs above suspended ceilings and ducts the dry air to the storage zone.

Gym Storage and Small Production Floor

Gym storage, equipment rooms, and small production floors share a common profile — moderate floor area (100–200 m²), mixed equipment loads, and a need to control humidity for both occupant comfort and equipment protection. The GDH-90E or GDH-138E (portable) and GDH-CE90 or GDH-CE138 (ceiling-mounted) sit in this capacity range. For production floors with process moisture sources, plan for one capacity step up from the floor-area baseline.

How to Size a Commercial Dehumidifier

Sizing depends on three things: the space volume, the moisture load, and the target humidity. Floor area alone is a rough indicator. For accurate sizing, you also need the ceiling height, the moisture sources (infiltration, occupancy, internal water), and the current vs. target RH.

Quick Sizing Table — Starting Point

Space Type	Floor Area	Recommended SHISHUO Model
Small commercial basement, encapsulated crawl space	Up to 60 m² (~650 sq ft)	GDH-50E or GDH-CE38
Standard commercial basement, retail back-of-house	60–100 m² (650–1,080 sq ft)	GDH-58E / GDH-60E or GDH-CE56
Mid-size warehouse, workshop, gym storage	100–140 m² (1,080–1,500 sq ft)	GDH-90E or GDH-CE90
Large commercial space, small production area	140–200 m² (1,500–2,150 sq ft)	GDH-138E / GDH-156E or GDH-CE138 / CE156
Open commercial floor up to ~220 m²	Up to 220 m² (2,400 sq ft)	GDH-CE168 (ducted) or two portable units

The table assumes a standard 2.8–3.2 m ceiling and normal moisture infiltration. Increase capacity by one model if any of the following apply:

• Ceiling height above 3.5 m (the air volume to treat is bigger than the floor area suggests)

• Frequent door openings, loading dock, or other significant air infiltration

• Internal water source — laundry, kitchen, pool, planted area, irrigation

• Target humidity below 50% RH (more moisture must be removed)

• Operating temperature below 18°C (compressor capacity drops below rated values)

AHAM and DOE Rating vs. Our Catalog Rating

Three rating standards are commonly used in commercial dehumidifier specifications, and the same physical machine will publish three different capacity numbers depending on which standard the test uses.

AHAM (Association of Home Appliance Manufacturers): 80°F / 60% RH (≈ 26.7°C / 60% RH). Most North American brands — AlorAir, Aprilaire, Santa Fe, Dri-Eaz — publish PPD ratings under this condition.

DOE 2019 (US Department of Energy): 65°F / 60% RH (≈ 18.3°C / 60% RH). Cooler test condition; produces a smaller published number, used for Energy Star qualification.

• Our catalog: 30°C / 80% RH. A warmer and more humid test condition, common in Chinese and European dehumidifier specifications. Produces the largest published number of the three because air at this temperature and humidity holds the most moisture for the unit to extract.

Approximate conversion ratios (based on absolute humidity between test conditions):

Our rating × 0.62 ≈ AHAM rating (in L/day). Multiply that by 2.11 to get PPD.

Our rating × 0.39 ≈ DOE 2019 rating (in L/day).

Example: GDH-60E is rated 60 L/day under 30°C / 80% RH. The equivalent figure under AHAM conditions is approximately 37 L/day, or about 78 PPD. Under DOE 2019 conditions it's approximately 23 L/day. This is normal compressor refrigerant dehumidifier physics — extraction capacity tracks the absolute moisture content of the inlet air, which falls sharply as temperature and humidity drop. The same effect applies to every brand on the market; what differs is which test condition each brand chooses to publish.

How Our Commercial Dehumidifiers Are Built — and Why Source Direct from the Factory

Every SHISHUO commercial unit ships with the same core hardware as our industrial dehumidifier range — the difference is the cabinet size, capacity, and 220V power supply, not the internal component quality.

Heat Exchanger

Condenser and evaporator both use copper tubing. Copper has higher thermal conductivity than aluminum, and resists corrosion under continuous high-humidity exposure better than aluminum fin alternatives. The GDH-CE ceiling-mounted series adds titanium foil fins on the coil for environments with chemically active air (pools, kitchens, coastal humidity).

Cabinet and Surface Treatment

Cabinets are fabricated from thickened sheet metal at our Jiaxing facility — we operate in-house CNC sheet metal cutting, punching, bending, and forming workshops, so cabinet quality is controlled directly rather than sourced from third-party suppliers. Surface treatment is moisture-proof coating to resist cabinet corrosion in tropical and coastal environments.

Refrigerant Options

Different models use different refrigerants depending on capacity and target market: R290 (propane, low GWP, preferred for EU markets), R134a (in lower-capacity models), and R32 (newer EU/Asia-Pacific standard). The refrigerant for each specific model is shown in the product matrix tables above. For OEM projects, refrigerant choice can be adjusted to match destination market regulations.

Control and Drainage

LCD touchscreen control panel with built-in humidity sensor on all models. Operators set target humidity, mode, and timer directly on the panel. Drainage: water tank with optional drain hose on portable models; direct continuous hose drainage on ceiling-mounted models. Automatic defrosting on all compressor units. Fault self-protection: compressor overload, refrigerant leakage, electrical leakage, water-overflow shutoff.

Manufacturing and Quality Control

All production takes place at our Jiaxing facility. Three workshops per catalog: Production Workshop (CNC sheet metal, punching, bending, forming, mechanical press), Condenser Production Workshop (fin pressing, copper tube brazing, condenser assembly and inspection), Assembly Workshop (main unit assembly line, component installation, refrigeration system assembly). Functional testing and final inspection take place before packaging per our 6-step customization flow.

Why Source Commercial Dehumidifiers Directly from a Factory

Most commercial dehumidifier brands sold in North America and Europe (AlorAir, Aprilaire, Santa Fe, Dri-Eaz, Ebac) are either US-engineered units assembled overseas, or Chinese-OEM products with a brand markup. Sourcing directly from the manufacturer changes the economics:

OEM and ODM with Real Engineering Support

If you are a distributor, contractor specifying for repeat projects, or a private-label brand: SHISHUO supports OEM (your branding on our standard hardware) and ODM (custom hardware — adjusted voltage, refrigerant, dimensions, color, control interface). The 6-step process is documented in our catalog: requirement analysis, solution and model selection, specification confirmation, production and assembly, testing, packaging and shipping.

Voltage Flexibility for Global Markets

Our standard commercial units run on 220V/50Hz. For markets requiring 110V/60Hz (most of North America for plug-in commercial), 240V/50Hz (UK, parts of Asia), 220V/60Hz (Korea, parts of Latin America), or other configurations, we can adjust the electrical specification at the project level.

Refrigerant Choice by Destination Market

Different markets have different refrigerant regulations. The EU F-gas rules increasingly favor R290 and R32 with low GWP; North America has been moving toward R-454B for residential and some commercial. We can specify the refrigerant for your project based on where the units will ship.

Frequently Asked Questions

What size commercial dehumidifier do I need for a 100 square meter basement?

For a standard 100 m² commercial basement with a 2.8–3.0 m ceiling and normal infiltration, the GDH-58E (58 L/day) or GDH-90E (90 L/day) is the typical specification. Choose GDH-58E if the basement is dry-sealed with low moisture infiltration; choose GDH-90E if there are foundation moisture issues, frequent door openings to outside, or internal moisture sources (laundry, water utility). For ducted installation through HVAC, GDH-CE56 or GDH-CE90 from our ceiling-mounted line is the equivalent.

Can I install a SHISHUO commercial dehumidifier in a crawl space?

Yes. Crawl space dehumidifier installation is a major application for our portable GDH series — GDH-50E or GDH-58E handles encapsulated crawl spaces up to about 100 m². For installation in a non-encapsulated crawl space (no 6-mil vapor barrier on the ground), size up by one model because moisture infiltration from the soil will be continuous. Direct the unit's drain hose to a sump pump or exterior gravity drain — do not leave condensate to accumulate in the crawl space.

How is a commercial dehumidifier different from a residential one?

Three differences: (1) Duty cycle — commercial units run continuously through the moisture season; residential cycle on/off through the day; (2) Power — commercial uses 220V single-phase (in some markets 110V/60Hz for OEM); residential uses standard household 110V/240V at lower current draw; (3) Drainage — commercial offers continuous drain hose connection for unattended operation; residential uses a tank you empty. SHISHUO commercial units are built for the first specification — continuous duty with continuous drainage.

What is the PPD rating of your commercial dehumidifiers?

Our catalog publishes capacity in L/day at 30°C / 80% RH test conditions, which is a warmer and more humid condition than the AHAM standard (80°F / 60% RH = 26.7°C / 60% RH) used by most North American brands. To convert: multiply our L/day figure by approximately 0.62 to get the equivalent AHAM L/day, then by 2.11 to get PPD. For example, GDH-60E rated 60 L/day in our catalog corresponds to about 37 L/day or 78 PPD at AHAM conditions. Under the cooler DOE 2019 standard (65°F / 60% RH), the figure drops further to about 23 L/day. We publish both numbers in our product matrix tables so you can compare directly with AHAM-rated competitors. This temperature-dependence applies to all compressor refrigerant dehumidifiers — not just ours.

Do you supply commercial dehumidifiers as a manufacturer for resale or private label?

Yes. SHISHUO is a manufacturer of commercial dehumidifiers, not a trading company. We support OEM (your branding, packaging, manual on our standard hardware) and ODM (modified hardware to your specification). The OEM/ODM process follows our standard 6-step flow: requirement analysis, solution and model selection, specification confirmation, production and assembly, testing and 100% final inspection, packaging and shipping. Voltage, refrigerant, color, controls, and packaging are all adjustable at the project level.

What refrigerants are used in your commercial dehumidifiers?

Four refrigerants are used across the range, depending on model and market: R290 (propane, low GWP, preferred for EU), R134a (used in some lower-capacity models), and R32 (newer EU and Asia-Pacific standard). For OEM projects to specific markets, we can specify the refrigerant to match local regulation.

What is the operating temperature range?

All compressor refrigerant commercial dehumidifiers in the GDH and GDH-CE range operate between 5°C and 38°C ambient. Below 5°C, the evaporator coil cannot stay above frost point even with automatic defrost, so capacity falls off sharply. If you need extraction below 5°C — cold storage rooms, unheated winter garages, refrigerated logistics — choose a desiccant unit from our ROD series instead, which extracts moisture by adsorption rather than condensation and is not temperature-limited the same way.

Can I install commercial dehumidifiers in a wall-mounted configuration?

Our GDH-CE ceiling-mounted models are designed for concealed overhead or in-plenum installation, ducted to the conditioned space. They are not designed for wall surface mounting in the way some North American residential dehumidifiers are configured. If your project requires wall-mounted dehumidifier installation specifically (for example, a slim profile mounted to a wall in a corridor), discuss this with us at the inquiry stage — wall-mounted enclosures can be designed under ODM.

Do you offer any humidifier and dehumidifier combo unit for commercial use?

Yes. Our DS-HS series is a humidifier + dehumidifier combo unit with integrated air filtration (activated carbon and ion sterilization). It serves applications that need bidirectional humidity control — archives, data rooms, GMP cleanrooms, museums, precision electronics manufacturing. Capacity range covers humidification 98–480 L/day and dehumidification 72–300 L/day. See our temperature and humidity control page for full specifications.

Technical Resources
Switch between the tabs below to learn more. Each tab links to a dedicated page.
AHAM, DOE 2019, and Catalog Rating — Reading Commercial Dehumidifier Specs Honestly
How the same physical unit publishes three different capacity numbers depending on which test condition is used (80°F / 60% RH AHAM, 65°F / 60% RH DOE 2019, 30°C / 80% RH catalog), and how to convert between the three so a spec sheet from any brand can be compared on a common basis.
Sizing Commercial Dehumidifiers by Space Type — Basement, Warehouse, Crawl Space
How floor area maps to capacity for the most common commercial applications, when ceiling height or air infiltration moves the recommendation up one model, and when to step from a single portable unit to either a ceiling-mounted ducted system or multiple portable units.
Refrigerant Selection by Destination Market — R290, R134a, R32
Comparison of the four refrigerants used across the GDH and GDH-CE commercial range: GWP values, EU F-gas regulation status, North American AIM Act compliance, and which refrigerant the OEM specification process selects for your destination market.
Portable GDH vs. Ceiling-Mounted GDH-CE — Installation and Maintenance Trade-Offs
When a wheeled portable unit with water tank is the right answer (renters, mobile use, intermittent applications) versus when a concealed ceiling-mounted unit with continuous hose drainage is the right answer (24-hour operation, hidden installation, occupied retail and office spaces), including filter access and condensate routing differences.

Commercial Dehumidifier — Portable and Ceiling-Mounted Units from a Chinese Manufacturer

Core Engineering Features Across Our Dehumidifier Range

All-Copper Condenser and Evaporator in Thickened Sheet Metal Housing

LCD Touchscreen Control with Intelligent Humidity Sensing

Automatic Defrosting and Continuous Drainage

Fault Self-Protection

Our Commercial Dehumidifier Range

High Capacity Dehumidifier (GDH-156E)

Indoor Swimming Pool Dehumidifier (GDH-60E / 90E / 138E / 156E Anti-Corrosion)

GDH-CE Ducted Dehumidifier Series (GDH-CE90 / CE138 / CE156 / CE168)

Compact Desiccant Dehumidifier

In addition to dehumidifiers, we also manufacture:

Applications We Serve

Commercial Basement Dehumidifier

Crawl Space Dehumidifier

Warehouse Dehumidifier

Garage and Workshop

Switchgear Room and Server Closet

Archives, Document Storage, Wine Cellar

Retail Back-of-House and Stockroom

Gym Storage and Small Production Floor

How to Size a Commercial Dehumidifier

Quick Sizing Table — Starting Point

AHAM and DOE Rating vs. Our Catalog Rating

How Our Commercial Dehumidifiers Are Built — and Why Source Direct from the Factory

Heat Exchanger

Cabinet and Surface Treatment

Refrigerant Options

Control and Drainage

Manufacturing and Quality Control

Why Source Commercial Dehumidifiers Directly from a Factory

OEM and ODM with Real Engineering Support

Voltage Flexibility for Global Markets

Refrigerant Choice by Destination Market

Need a Sizing Calculation for Your Greenhouse?

About SHISHUO

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Oem-Odm

Certifications

Frequently Asked Questions

What size commercial dehumidifier do I need for a 100 square meter basement?

Can I install a SHISHUO commercial dehumidifier in a crawl space?

How is a commercial dehumidifier different from a residential one?

What is the PPD rating of your commercial dehumidifiers?

Do you supply commercial dehumidifiers as a manufacturer for resale or private label?

What refrigerants are used in your commercial dehumidifiers?

What is the operating temperature range?

Can I install commercial dehumidifiers in a wall-mounted configuration?

Do you offer any humidifier and dehumidifier combo unit for commercial use?

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