Quick Verdict
- Daily dishwashing with stable temperature: choose a storage under-sink heater.
- Temporary rental use, warm hand-washing only: an instant faucet is enough.
Three Dimensions
| Dimension | Storage Heater | Instant Faucet |
|---|---|---|
| Heating | Tank storage, preheated | On-the-fly, no tank |
| Power / wiring | 1200-2200W, 10A socket | 2000-3000W, mostly 16A |
| Stability | Stable, 5-15 min continuous | Fluctuates with pressure |
| Lifespan | 5-8 years (enamel tank) | 2-4 years typical |
| Price | 300-1000 CNY | 100-300 CNY |
Safety
Faucet heaters pass water over a live element and demand excellent isolation; cheap units carry higher leakage risk. Storage heaters ship with RCD plugs and dry-burn protection.
How to Choose
With budget and under-sink space, go storage. For a stopgap faucet, insist on 3C certification, an RCD plug and a grounded socket.