Mi 3 BAT instantaneous water heater, compact, hydraulically controlled, 3.5 kW / 230 V, with a two-handle faucet, wall-mounted above the sink 1500-17120

Tankless water heater that operates only when you need hot water

The unit turns on automatically when you open the tap – no standby mode, no energy losses. Water is heated on demand, without unnecessary storage tanks. This means you don't wait for heating, and at the same time you don't heat water you're not using.

The set includes a special above-sink faucet with a two-handle mixer and a swivel spout 16 cm long – all mounted directly onto the faucet. The spout is replaceable, and the water connections (G ⅜" to the unit, G ½" to the faucet) allow easy adaptation to most existing installations. It does not require network pressure – it works even at low pressure (from 1 bar), making it ideal for older buildings or locations with limited water supply.

Why it works better than a storage tank

The IES® heating element made of noble steel is unshielded – there is no cover that could accumulate limescale. This means: less maintenance, longer service life, and easy replacement of the heating cartridge without dismantling the entire unit. Water flows through it in an optimized manner – as a result, it activates at a flow rate of 1.3 l/min, and at 2.0 l/min it achieves a temperature 25°C higher than the inlet temperature (e.g., from 15°C to 40°C). The CSP 3 flow regulator (included in the set) adds air to the flow – the water foams gently without splashing, creating the impression of abundant flow.

Installation and safety

You can install it yourself: the unit is mounted on the faucet, the power cord has a Euro plug and is 65 cm long – simply plug it into a standard socket. A cable cross-section of 1.5 mm² is sufficient with a 16A protection device. The pressure safety device reacts immediately to installation failures – for example, if the pressure suddenly increases on the cold water side. The maximum outlet temperature is 55°C – safe for everyday use. Dimensions: 13.5 × 18.6 × 8.7 cm – fits under any sink without the need for furniture modifications.

The unit weighs only 1.5 kg – it does not overload the wall or the faucet. Energy class A – saves up to 85% of energy compared to traditional small 5-liter storage tanks.