2.5 – 4 mm² cable tolerance
A wider cable range than the rest of the series, so the same unit suits installations specified at either the minimum or the next gauge up.
A 140 × 60 × 180 mm unit with the control panel running vertically — the same footprint as the GB-21, laid out for wall mounting beside a sink or basin. 3,500–5,500 W across 110 V and 220 V, copper inlet and outlet, and a cable tolerance of 2.5 to 4 mm².
MOQ 100 pcs for custom panel colour, pattern and logo · 1,000 pcs for custom packaging. Samples from 1 pc — the sample price is higher than the bulk price, and we refund the difference once you place a bulk order within 30 days of receiving the sample. Prices are quoted per order, EXW Shanghai — tell us your quantity and destination port and we will reply within one working day.
Why this model
Wider cable tolerance — 2.5 to 4 mm².
A wider cable range than the rest of the series, so the same unit suits installations specified at either the minimum or the next gauge up.
Mounts beside a kitchen sink or a bathroom basin. Water reaches temperature in about two seconds and nothing is stored.
1 kg and 140 mm wide. 24 pieces to a 26 kg carton — the densest packing in the series.
Copper inlet and outlet, rotary knob, and a circular LED showing the live outlet temperature.
Specifications
Every unit is pressure-tested and function-tested before packing. Custom panel finish and power connection available for OEM orders.
| Rated power | 3,500 / 5,500 W |
|---|---|
| Rated voltage | 110 / 220 V ~ · 50 / 60 Hz |
| Heating element | Stainless steel cup, 5.5 kW |
| Heating time | ≈ 2 seconds |
| Temperature range | 30 – 55 °C |
| Control | Rotary knob with LED temperature display |
| Water ports | Copper inlet and outlet |
| Power cable | ≥ 2.5 – 4 mm² copper core |
| Power connection | Plug standard to order (EU / US / UK / AU / Africa) |
| Protection | Water–electricity separation · Over-temperature protection · Dry-heat protection · Leakage protection |
| Waterproof rating | IPX4 |
| Certification | CE · RoHS |
| Unit size | 140 × 60 × 180 mm |
|---|---|
| Inner box | 240 × 100 × 200 mm |
| Pcs per carton | 24 pcs |
| Carton size | 565 × 485 × 390 mm |
| Gross weight | 26 kg |
| Loading | LCL and FCL both available |
OEM & ODM
We build for importers, wholesalers and own-brand retailers — from a panel colour change to a fully customised product and gift box.
Body colour and front panel in your colour and pattern, with your logo printed or laser-etched. Artwork proof before mass production.
MOQ 100 pcsCustom printed inner box and master carton, colour or gift box, barcode and retail labelling. Export cartons are drop-tested.
MOQ 1,000 pcsPlug standard (EU / US / UK / AU / Africa) and cable length matched to your market. Shower set included or optional as listed above.
No extra MOQCE and RoHS test reports, product photos, specification sheets and packing lists for your own listings and customs clearance.
Ready to shareSamples & price protection
Every model is available as a sample, and every price step you reach is paid back to you — the sample itself included.
Order a single unit to test it, open it up and show your own customers. No minimum quantity, any model in the range, shipped with its CE and RoHS test reports.
MOQ 1 pcA single unit is charged above the bulk price, because of one-off handling and air freight. Place a bulk order for the same model within 30 days of receiving the sample and we refund the difference.
30-day rebateOur four price tiers — 10–99 / 100–999 / 1,000–9,999 / 10,000+ pcs — are counted cumulatively over the 30 days after you receive the goods. Reach a higher tier and we refund the difference on the units you have already shipped.
Cumulative over 30 daysTell us which model you want to test and we will send the sample invoice the same working day.
Send us your quantity, destination port and power connection requirements — we will come back with prices and lead time within one working day.
Browse the full range — instant water heaters, hot water taps and bathroom & desk heaters — in one PDF.