What We Compared
Four measurable metrics: time to heat to 45°C, 24h standby loss, tank material & warranty, and street price per capacity.
Quick Verdict
- Best value: leading domestic brands, 6L enameled-tank models at 400-600 CNY with 3-year warranty.
- Best durability: premium brands offer 8-year tank warranties at roughly double the price.
- Renters: 300 CNY mechanical small-capacity units are enough and removable.
Warning
Instant (tankless) under-sink heaters draw 5500W+ — unusable on ordinary 10A kitchen circuits. Confirm your wiring first.