Smart AC Controllers & Thermostats
Bosch Ii Smart Thermostat
$102.32lowest, at Amazon AU
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Buy at Amazon AUAbout this product
The Bosch Room II is a wall-mounted smart thermostat for heating and cooling control via app. It uses ZigBee connectivity, features adaptive learning and scheduling, and works with Google Assistant, Amazon Alexa, and Apple Home. Battery-powered with temperature and humidity sensors, it includes child protection and mounting hardware.
Highlights
- Power SourceBattery
- Wireless TechnologyZigbee
- Display TypeLED
- Control InterfaceApp
- LearningAdaptive learning
- ProgrammableYes (scheduling)
Features and specifications in this description are as the brand describes them.
The Bosch Room II is a compact smart thermostat designed to manage room temperature across heating and cooling systems. It connects to your smart home network via ZigBee, a low-power wireless protocol used by many smart home sensors and bulbs, and communicates with voice assistants including Google Assistant, Amazon Alexa and Apple Home. The brand describes it as suitable for different environments, with dimensions of 86 mm width, 28 mm depth and 87 mm height.
The thermostat features an LED display measuring 70 by 40 mm and includes sensors for both humidity and temperature. It supports scheduling for heating control and remote adjustment of heating via the app from another location. It runs on AAA batteries and comes with wall-mounting hardware for installation. The device includes child protection features and the brand claims it supports adaptive learning, though the sources do not detail how this works or what it learns.
Before purchasing, confirm your heating and cooling systems are compatible with ZigBee-based control, and check that your chosen voice assistant ecosystem matches your wider smart home setup. The sources do not specify battery life, the learning mechanism, or how the remote app features differ between heating and cooling control.
Key features
- ZigBee wireless connection to smart home networks
- Remote heating adjustment via companion app
- Built-in temperature and humidity sensors
- Compact wall-mounted design with LED display
- Adaptive learning capability
Setting it up
- Install the companion app on your smartphone or tablet
- Power the thermostat with AAA batteries
- Mount the device to a wall using the supplied hardware
- Add the thermostat to your ZigBee network following the app prompts
- Connect it to your chosen voice assistant through the app
Good to know
- It is designed for room temperature control in various settings; confirm compatibility with your specific heating and cooling system before buying
- A compatible ZigBee smart home hub or bridge is needed for the device to function; check that you have one in your setup
- Voice assistant integration supports Google Assistant, Amazon Alexa and Apple Home, so verify your ecosystem
- The sources do not state battery life or how often you will need to replace the AAA batteries
- The brand mentions adaptive learning for heating, but does not explain what data it uses or how to configure it
Research-based: compiled from the manufacturer's information and Australian retailer listings. NXT Smart Home has not tested this product.
Best for: Smart home enthusiasts running Zigbee or Bosch ecosystems who manage European-style heating setups and need wall-mounted climate monitoring.
Pros
- Equipped with an LED matrix display and built-in sensors for temperature and relative humidity according to Bosch.
- Operates without subscription fees for schedules, automations, and app control per manufacturer specifications.
- Supports Matter, Apple Home, Google Assistant, and Alexa via the Bosch Smart Home Controller, as well as direct Zigbee integration with Home Assistant.
- Offered as a battery-powered model running on four standard AAA batteries or as a hardwired 230 V model.
Cons
- Not officially sold or supported by Bosch in Australia, leaving grey-market imports without local warranty support.
- Designed for European radiator and underfloor heating setups rather than standard Australian 24 V ducted or reverse-cycle HVAC systems.
- Lacks built-in Wi-Fi and requires a separate Bosch Smart Home Controller or Zigbee 3.0 coordinator to function.
The Bosch Smart Home Thermostat II (models BTH-RM and BTH-RM230Z) is a wall-mounted climate interface fitted with internal temperature and humidity sensors. According to Bosch, the thermostat features an LED matrix display and an integrated status light band. It communicates via Zigbee 3.0 across 2.4 GHz rather than Wi-Fi. The device is produced in two distinct hardware versions: a standalone battery model powered by four AAA alkaline batteries, and a flush-mounted 230 V mains unit designed for wall-box installation. Both versions monitor room conditions and transmit data to a connected platform, though neither provides standalone smart features without a compatible controller or Zigbee hub.
Who it suits
This device suits advanced smart home users who manage a Zigbee coordinator—such as Home Assistant via Zigbee2MQTT or ZHA—and want a clean, wall-mounted display for environmental data. It also suits Australian properties fitted with imported hydronic heating, European-style water underfloor heating, or radiator valves compatible with Bosch switching relays. If you already operate a Bosch Smart Home Controller II, the unit integrates into Apple Home, Amazon Alexa, Google Home, and Matter ecosystems.
Conversely, standard Australian households should skip this thermostat. Bosch states it is tailored for European heating systems, meaning it is not directly compatible with standard Australian 24 V multi-stage ducted systems or common reverse-cycle split-system air conditioners. Buyers who do not own a compatible Zigbee bridge or Bosch hub will also find the smart automations inaccessible.
Australian notes
Bosch Australia does not officially distribute or market the Smart Home Thermostat II lineup locally. Mainstream Australian retailers do not stock the device, meaning units circulating locally are grey-market imports. Consequently, there is no official Australian manufacturer warranty available through local channels.
The wireless protocol uses Zigbee 3.0 on standard 2.4 GHz channels and does not connect directly to home Wi-Fi networks.
For anyone considering the mains-wired BTH-RM230Z version, Australian electrical compliance rules apply; check your state's electrical safety regulator regarding mandatory mains installation by a licensed electrician. Renters should opt against mains electrical modifications and review their local residential tenancy authority before affixing hardware to walls.
- Brand
- Bosch
- Model
- Ii Smart Thermostat
- Control Interface
- App
- Learning
- Adaptive learning
- Programmable
- Yes (scheduling)
- Remote Programming
- Yes (Heating can be adjusted via the app from a remote location)
- System Compatibility
- Control heating systems, Control cooling systems
- System Type
- Radiator thermostats
- Touchscreen
- No
- Display Type
- LED
- Wireless Technology
- Zigbee
- Power Source
- Battery
- Sensor Type
- Humidity, Temperature
- Mounting
- Wall mounting
- Mounting Hardware
- Yes
- Top Use Cases
- Smart homes
- Typical Users
- Office users (Büro), Homeowners (Wohnung/Haus)
- Shape
- Rectangular
- Cover Height
- 87 mm
- Cover Width
- 86 mm
- Energy Saving
- Yes
- Accessory Type
- Mounting plate
- Subtype
- Smart
Features
Assistant Support
- Google Assistant
- Amazon Alexa
- Apple Home
Safety Features
Child protection
Specifications are sourced from the manufacturer listing. Confirm details on the retailer's product page before purchasing.
- Brand
- Bosch
- Category
- Climate & Comfort
- Product type
- Smart AC Controllers & Thermostats
- SKU
- bosch-ii-smart-thermostat
- Catalogue ID
- 15832492802411858369
- Last Updated
- 22 October 2026
Prices are indicative and in Australian dollars — confirm on the retailer's site.We may earn a commission from links on this page, at no extra cost to you. Read our full disclosure.
- https://www.bosch-smarthome.com/at/de/produkte/heizung/raumthermostat/
- https://www.desertcart.com.au/products/526325025-bosch-smart-home-room-thermostat-ii-for-controlling-smart-radiator-thermostats
- https://www.ebay.com.au/itm/298692781561
- https://www.bosch-smarthome.com/de/de/support/hilfe/hilfe-zum-produkt/hilfe-zum-raumthermostat-2/
- https://www.bosch-smarthome.com/res/web/produkt/raumthermostat2_230/pdf/8-750-002-893_RT_II_230V_OM_11L_V001_240205.pdf
- https://www.bosch-smarthome.com/gb/en/eu-data-act/
- https://www.reichelt.com/de/en/shop/product/room_thermostat_ii_230v-369237
- https://www.bosch-smarthome.com/gb/en/support/help/product-help/room-thermostat-2-help/
- https://tt-smarthome.resource.bosch.com/nrt/web/produkt/raumthermostat2_230/pdf/BOSCH_22_0026_Raumthermostat_II_230V_EN_V003_Web.pdf
- https://www.zigbee2mqtt.io/devices/BTH-RM230Z.html
FAQs
Can I control the thermostat when I'm away from home?
Yes, the brand states that heating can be adjusted via the app from a remote location, allowing you to change temperature settings while away.
What voice assistants work with this thermostat?
The thermostat is compatible with Google Assistant, Amazon Alexa and Apple Home.
Does it work with both heating and cooling systems?
According to the specifications, the Bosch Room II can control both heating and cooling systems, though the sources do not detail whether all features like remote adjustment work equally for both.
What batteries does it use?
The thermostat is powered by AAA batteries.
Price history: Bosch Ii Smart Thermostat
Lowest price we recorded across Australian retailers, last 30 days.
- Now
- $102.32
- 30-day low
- $100.45
- 30-day high
- $102.32
- Change
- +$1.58
We began recording on 17 Oct, so this shows 12 days so far. Prices are checked on retailer pages and can change at any time; confirm on the retailer's site.
Where to Buy Bosch Ii Smart Thermostat in Australia
Compare stock availability and AUD pricing across verified Australian retailers. Prices checked 22 October 2026 — confirm on the retailer's site.
