Xiaomi has launched its newest smart gas water heater in China with AI controls, HyperOS connectivity and zero-cold-water performance — a feature aimed at cutting water waste and delivering instant hot showers even in large homes.
The Mijia Smart Gas Water Heater 2 Zero Cold Water 18L went up for reservation this week at 2,499 yuan (about $353) and will officially go on sale on December 15 through JD and other major retail platforms.
Bigger Capacity and More Intelligent Heating
Xiaomi’s newest heater follows the earlier 16-liter version released last month, adding more output capacity for homes that need stronger hot-water performance. The 18L model uses natural gas and is designed for stable combustion even when household gas pressures fluctuate.
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Hot water is steady. No sudden temperature shocks.
The unit delivers a rated heat load of 34 kW — enough power to sustain multiple taps or showers during winter. A minimum heat load of 3 kW allows gentler heating for low-flow conditions, helping users avoid scalding or unstable temperatures.
Xiaomi says the wide supported water-pressure range (0.02 MPa to 0.85 MPa) makes the heater suitable for both low-rise apartments and high-rise buildings that face inconsistent supply.
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Flexibility matters for Chinese housing layouts.
Booster Pump Designed for Big Homes
Xiaomi equipped the heater with an 8100 rpm TSI booster pump engineered to increase circulation speed and improve hot-water delivery for large or multi-floor households.
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The company claims water output can improve by 170%.
The system supports a 120-meter circulation loop and a 15-meter lift, which can push water throughout duplexes, villas or extended pipe networks without delay.
Hot-water production reaches 18 kilograms per minute with a 25°C rise, according to Xiaomi, making it capable of handling multiple outlets — kitchen, bathroom and washroom — without loss of temperature.
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That’s aimed at families tired of cold tap surprises.
Better Energy Modes for Daily Use
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The heater runs in different power modes.
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48W during normal shower operation
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66W when running the booster pump
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80W in antifreeze mode
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Up to 114W in boosted shower mode
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Energy use depends on home layout and climate.
The antifreeze option helps protect internal water lines in colder regions, where winter temperatures can cause low-pressure flow or pipe freezing.
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Homes in northern China will see value here.
Zero-Cold-Water System Cuts Waste
One of the standout features is zero-cold-water functionality, which preheats water already inside the pipes before the shower is turned on. Instead of waiting several seconds — or even minutes — for hot water to travel through a long pipe network, the system begins circulation ahead of time, reducing wasted water.
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This is popular in cities where water costs are rising.
Xiaomi says circulation is quiet enough for daily routines, including early-morning or late-night showers without pipe noise.
Connectivity Gets an Upgrade With HyperOS
The heater supports Wi-Fi (2.4 GHz) and integrates into HyperOS, Xiaomi’s expanding multi-device operating system. Users can control temperature, schedule heating, check pump status, or automate routines through the Mijia app.
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Remote control feels normal once you try it.
Smart scenarios enable interactions such as:
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Door-lock linked preheating — when someone enters the bathroom, the heater prepares hot water
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Coordination with Xiaomi bathroom heaters, ventilation systems, or smart switches
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Routine scheduling, like automatic preheating early in the morning or before bedtime
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Xiaomi wants the heater to feel as connected as a smart speaker or a robot vacuum.
AI Chip Adjusts Temperature in Real Time
Xiaomi added an AI chip that monitors inlet water temperature and adjusts combustion output continuously. The company claims temperature accuracy within ±0.5°C, reducing the sudden spikes or drops that happen when multiple people use taps at the same time.
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Kids and elderly users benefit from safer temperature stability.
The AI controller analyzes real-time flow, gas output, and water conditions so that users don’t have to tweak knobs manually. It helps avoid the classic scenario: hot water turning lukewarm when someone opens a kitchen tap or runs a washing machine.
Compact and Modern Aesthetic
The heater measures 575 × 365 × 184 mm, with a full-glass front panel that fits modern kitchen or bathroom designs. Xiaomi emphasizes minimal protrusion, making the unit blend into home interiors rather than feel like a bulky mechanical box.
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The design makes sense for apartment renovations.
Homes with limited space can mount the heater vertically without losing access to service ports or gas lines.
Where It Fits in Xiaomi’s Smart Home Strategy
Xiaomi has steadily expanded the Mijia smart appliance lineup, connecting everything from robot vacuums to induction cookers to smart climate products under HyperOS.
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Each appliance becomes part of a shared digital environment.
Compared to traditional heaters, Xiaomi’s connected models allow app-based automation, voice control and predictive behaviour — making the heater an active part of the home rather than a passive unit mounted on a wall.
Analysts say Xiaomi is positioning smart home water systems as the next mass consumer category, where energy efficiency, automation and instant hot water matter as much as phones or TVs.
Early Market Reception
Pre-sales opened with moderate consumer interest on JD and Xiaomi Mall, with many buyers attracted by zero-cold-water functionality and intelligent temperature control.
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Reviews will depend heavily on winter performance.
Some users in northern provinces prefer devices with stronger antifreeze durability, while large coastal apartments value circulation lift and rapid hot-water response.
The company expects demand to rise near year-end renovation and heating season, especially among families replacing older gas heaters after long-term use.
