20LH Vertical Commercial Water Purifier

Ningbo Aofukang Intelligent Technology Co., Ltd. specializes in manufacturing water dispensers, holding CB and CE international certifications and implementing the ISO9001 management system. We also offer customized OEM services to meet global market demands. Our 20LH Vertical Commercial Water Purifier features high flow and efficient water output, ideal for commercial settings including offices, schools and factories to satisfy group drinking water needs. Equipped with an LED display, it clearly shows TDS value, filter replacement alerts and water temperature.

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Product Description

The E500 is a floor‑standing 20L/H Vertical Commercial Water Purifier assembled at Aofukang's ISO9001:2015‑certified facility in Cixi. It uses a 100‑GPD RO membrane paired with PP, CTO, and T33 pre‑ and post‑filters to produce up to 20 litres of purified water per hour for hot and cold dispensing. The body is galvanised steel with stainless steel panels; the internal hot‑water tank is 304‑grade stainless. A 4‑level temperature selector, LED digital readout showing TDS and water temperature, and a 3‑hour auto‑sleep function are built into the control interface. An 800 W heating element supplies hot water at approximately 90 °C, while a 90 W compressor delivers cold water at 5–10 °C. CE, CB, and RoHS documentation is maintained for this model.

Product Parameter

Model	E500
Filter	PP + CTO + RO + T33
Water Temperature	Hot / Cold
Water Spout	2
Child Lock	Yes
Cooling Method	Compressor Cooling
Rated Voltage / Frequency	220-240V 50/60Hz
Heating Power / Capacity	800W / 20 L/h (≈90℃)
Cooling Power / Capacity	90W / 2.0 L/h (5-10℃)
Purified Water Flow	100 GPD
Product Dimensions	320 × 390 × 1350 mm
Packing Dimensions	450 × 377 × 1385 mm
Package	5-Layer Brown Carton Box
Load Quantity (40HQ)	281 PCS
Body Material	Galvanised Steel + Stainless Steel
Display Type	LED Digital Screen

Filtration Performance & Water Efficiency

RO membrane and multi-stage filter assembly

The E500 employs a 4‑stage filtration train: PP sediment → CTO carbon block → RO membrane → post‑T33 carbon. The RO membrane is rated at 100 gallons per day and accounts for the bulk of contaminant rejection. Under typical municipal water pressure, the system removes between 95% and 99% of total dissolved solids, heavy metals, bacteria, and organic compounds. The wastewater ratio is tuned to approximately 1:1, meaning roughly one litre of concentrate is produced for every litre of purified water. This ratio balances purification thoroughness with water consumption and can be adjusted within the factory‑set range depending on feed‑water quality.

Display & Control Functions

LED digital display showing TDS and temperature

A front‑facing LED screen displays the current TDS value and outlet water temperature. Alongside these readouts, a filter‑change indicator tracks cumulative cartridge usage and prompts a replacement notification when the service interval is reached.

Water temperature is adjustable across four preset levels. Users select the desired level via a button on the control panel; the heater or compressor engages as needed to bring the water to the chosen setting. This arrangement accommodates straight drinking water, tea preparation, instant coffee, and other common commercial beverage tasks.

An automatic sleep function reduces power draw after three hours of inactivity. The heating and cooling circuits enter a low‑power standby state and resume normal operation when a dispense button is pressed or the screen is touched. This feature is intended to lower overnight and weekend energy consumption without requiring staff to switch the unit off manually.

Build & Internal Materials

The outer body is constructed from galvanised steel with stainless steel panels. The steel has been treated for rust resistance and finished with a spray coating that withstands routine cleaning with mild detergents. The 1350 mm height makes the dispense point accessible without bending, while the narrow 320 mm width conserves floor space in corridors, break rooms, or beside office cabinetry.

Internally, the hot‑water tank is fabricated from 304 food‑grade stainless steel. Tank seams are welded using automated argon‑arc equipment; the resulting joints are smooth and free of pits that could trap bacteria or scale. A 20‑litre‑per‑hour heating capacity supports continuous dispensing during peak morning and lunchtime demand in offices, retail backrooms, and similar commercial settings.

Suitability & Placement

The E500 is designed for locations where a plumbed‑in, floor‑standing purifier serves multiple people throughout the day. Typical installations include office break rooms, convenience store staff areas, small hotel lobbies, and educational staff rooms. A mains water connection and a standard 220–240 V outlet are the only utilities required.

Because the unit stands on the floor and vents from the rear, a clearance of at least 10 cm behind and on each side is recommended for compressor airflow. The front panel remains accessible for filter changes; all cartridges are reached by opening the lower door, and no tools are needed to unscrew the filter housings.

Certifications & Manufacturing

Each E500 passes a factory inspection covering water‑circuit sealing, electrical safety, RO membrane output verification, and heating/cooling cycle tests. Aofukang holds the certifications below; they are valid for this model and can be provided for import or tender documentation.

The Cixi factory spans 7,153 m², operates 6 assembly lines, and produces over 300,000 units annually across all categories. In‑house sheet‑metal fabrication and injection moulding provide direct control over the steel body and plastic internal components. Custom branding, voltage configurations, and packaging are available under OEM terms with a minimum order quantity.

Frequently Asked Questions

Q: Does this unit need a dedicated water line, or can it run on bottled water?

A: The E500 must be connected to a mains cold‑water supply. It is not designed for bottled water. A standard ¼‑inch or ⅜‑inch feed line is typically used, and a drain connection is required for the RO concentrate line.

Q: How often should the RO membrane and pre‑filters be replaced?

A: The PP and CTO pre‑filters are generally replaced every 6–12 months, and the post‑T33 carbon every 12 months. The RO membrane lasts 2–3 years under normal municipal water conditions. The built‑in filter‑change indicator provides a reminder based on actual usage rather than calendar time alone.

Q: Can the 3‑hour sleep timer be disabled or adjusted?

A: The sleep function activates automatically after three hours of inactivity. It cannot be disabled, but it does not affect the filtration side—water continues to be purified and stored. Touching any button wakes the unit within a few seconds.

Q: What is the typical lifespan of the galvanised steel body in a humid environment?

A: The body panels are treated with a rust‑resistant coating and have passed standard salt‑spray corrosion tests. In a normal indoor commercial setting, the finish is expected to remain intact for the service life of the appliance. Chips or deep scratches should be touched up to prevent localised corrosion.