Bosch Smart Home Thermostat II Review: Matter, 2 Yr Battery

Name: Bosch Smart Home Radiator Thermostat II [+M] Matter
Brand: Bosch

Bosch Smart Home II [+M] at a glance

In short: the Bosch Smart Home II [+M] scores 8,6/10 in our radiator thermostat review (from €40). Biggest strength: Matter-ready from the factory. Main compromise: Matter hub for full features.

All specifications come from manufacturer data sheets and the Amazon catalogue and were cross-checked before publication. The rating is an editorial overall assessment based on this data; we do not trial products ourselves.

Bosch Smart Home II [+M]: what works and what doesn't?

What works well

Matter-ready from the factory: Works with Apple Home, Echo Hub, Google Nest
Also without a Bosch hub: Directly usable via a Matter hub
Open-window detection: Built in, saves heating energy
Long battery life: Over 2 years on 2× AA
0.5 °C steps: Fine temperature control
Good build quality: Bosch quality
Fair value for money: From €40 with Matter future-proofing

Points of criticism

Matter hub for full features: Limited without a hub
LED instead of E-Ink: Less economical than the FRITZ!DECT 302
Bosch app partly complex: Setup not entirely trivial
No native geofencing: Only via smart home automations

Specifications in detail

Manufacturer	Bosch Smart Home
Model	Radiator thermostat II [+M] (8750002861)
Device type	Wireless radiator thermostat
Wireless	Zigbee 3.0 or Matter/Thread
Hub needed?	Optional (Matter hub for Matter mode)
Smart home	Alexa, Google, Apple HomeKit (via Matter)
Battery	>2 years (2× AA)
Matter	Yes (from the factory)
Open-window detection	Yes (built in)
Heating profiles	Individual per room
Temperature steps	0.5 °C
Adaptive heating	Yes
Display	LED display
Valve compatibility	M30 × 1.5 + adapter
Warranty	24 months

Build quality & everyday use

What carries the Bosch Smart Home II [+M] in everyday use: Matter-ready from the factory (works with Apple Home, Echo Hub, Google Nest) and Also without a Bosch hub (directly usable via a Matter hub). You have to be honest about the weaknesses: Matter hub for full features. Limited without a hub.

If you set the device up to save space, make sure it stands on a stable, level surface with some air around it. This protects the mechanics and electronics in continuous use.

“Bosch Smart Home Radiator Thermostat II [+M] Matter: Matter-ready from the factory and also without a Bosch hub, with needing a Matter hub for full features as the trade-off. At 8.6/10 a safe choice from €40.”

The MiniHaushalt.de editorial team

Who is the Bosch Smart Home II [+M] suited to? (Buying advice)

Perfect for:

✓Matter ecosystem planners
✓Apple HomeKit users (via Matter)
✓Anyone who wants to start without a Bosch hub
✓Future-proof smart home investors
✓Echo Hub / Nest Hub owners

Less suitable for:

✕Anyone without a Matter hub (limited)
✕Minimalists (FRITZ!DECT is simpler)
✕Anyone who wants an E-Ink display

Bosch Smart Home II [+M] compared with alternatives

Head-to-head with the top alternatives from our radiator thermostats comparison

Feature	Bosch Smart Home II [+M]	tado° V3+	AVM FRITZ!DECT 302	Eve Thermo 2020
Wireless	Zigbee / Matter	868 MHz + Bridge	DECT ULE	Bluetooth + Thread
Hub needed?	Optional (Matter hub)	Yes (in set)	FRITZ!Box	Optional
Smart home	Alexa, Google, HomeKit (Matter)	Alexa, Google, HomeKit, Matter	MyFRITZ!, Alexa, Google	HomeKit, Alexa, Google (Matter)
Battery	>2 years (2× AA)	6 to 24 months (2× AA)	>1 heating season (3× AA)	3 to 6 months (2× AA)
Matter	Yes	Yes	No	Yes
Price	from €40	from €150	from €50	from €52

Similar radiator thermostat models

Eve Thermo 2020 8.4/10 · €52 Homematic IP Compact (HmIP-eTRV-C) 8.5/10 · €40 tado° V3+ Starter Kit 9.0/10 · €150 AVM FRITZ!DECT 302 8.7/10 · €50

Frequently asked questions about the Bosch Smart Home II [+M]

What does [+M] mean on the Bosch thermostat?

The [+M] stands for Matter. This version is Matter-ready from the factory and can be integrated directly into Apple Home, Amazon Echo Hub, Google Nest or SmartThings, via a Matter-capable hub (e.g. HomePod, Echo Hub, Nest Hub). The standard version without [+M] absolutely needs the Bosch Smart Home Controller.

Do I need the Bosch Smart Home Controller?

No, not necessarily. With the [+M] version you can control the thermostat via any Matter hub (Apple HomePod, Echo Hub, Google Nest Hub). If you want the full Bosch functionality (app automations, Bosch scenes), however, you need the Bosch Controller.

Does it work with Apple HomeKit?

Yes, via Matter. You add the thermostat to the Apple Home app with the Matter code (a HomePod or Apple TV as hub is required). That makes it one of the few radiator thermostats with genuine HomeKit support.

How long does the battery last?

Over 2 years on 2× AA batteries, one of the best run times in the class. Bosch uses an energy-efficient radio mode and the LED display only lights up when operated.

Does open-window detection really save energy?

Yes. The thermostat detects from the sudden drop in temperature that a window has been opened and automatically turns the heating down. When it closes, it heats back up. That measurably saves heating energy when airing the room.

Will it fit my radiator?

On 95% of all German radiators (standard M30 × 1.5). Adapters for Danfoss valves (RA, RAV, RAVL) are included. Tool-free installation in 2 minutes.

8.6 / 10 · Matter-ready from the factory

Verdict: is the Bosch Smart Home II [+M] worth it?

A safe choice in its class: if you can live with needing a Matter hub for full features, from €40 you get one thing above all: Matter-ready from the factory. Best suited to: Matter ecosystem planners.

If you want to compare alternatives, you will find detailed data and reviews on our radiator thermostats comparison page.

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Bosch Smart Home Thermostat II [+M]: Matter from the factory