AVM FRITZ!DECT 302 at a glance
In short: the AVM FRITZ!DECT 302 scores 8,7/10 in our radiator thermostat rating (from €50). Biggest strength: no extra hub. Main compromise: FRITZ!Box required.
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.
AVM FRITZ!DECT 302: what works and what doesn't
What works well
- No extra hub: uses your existing FRITZ!Box, saving €50 to €100
- Very inexpensive: from €50 the cheapest branded thermostat
- E-Ink display: battery-efficient, easy to read
- No cloud requirement: data protection: local via the FRITZ!Box
- DECT ULE very economical: battery lasts a whole heating season
- Boost + open window: all the important comfort features
- Made in Germany: AVM quality, German support
Points of criticism
- FRITZ!Box required: not usable at all without a FRITZ!Box
- No HomeKit: Apple users left out
- No Matter: not future-proof for Matter ecosystems
- No geofencing: schedules only, no location-based automation
Specifications in detail
| Manufacturer | AVM (Berlin) |
| Model | FRITZ!DECT 302 |
| Device type | Wireless radiator thermostat |
| Wireless | DECT ULE (via FRITZ!Box) |
| Hub needed? | Yes, but FRITZ!Box is enough |
| Smart home | MyFRITZ!, Smart Home app, Alexa, Google |
| Battery | >1 heating season (3× AA) |
| Display | E-Ink (energy-saving) |
| Heating profiles | Weekly schedule, 8 switching points/day |
| Boost function | Yes (quick heating) |
| Open-window detection | Yes |
| Offset correction | Yes (temperature adjustment) |
| Frost protection | Yes |
| Cloud requirement | No (local via FRITZ!Box) |
| Matter | No |
| Valve compatibility | M30 × 1.5 + adapter |
| Warranty | 24 months |
Build quality & everyday use
What carries the AVM FRITZ!DECT 302 in daily use: no extra hub (uses your existing FRITZ!Box, saving €50 to €100) and very inexpensive (from €50 the cheapest branded thermostat). The weaknesses need to be stated honestly: FRITZ!Box required, since it is not usable at all without a FRITZ!Box.
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.
Who is the AVM FRITZ!DECT 302 suited to? (Buying advice)
Perfect for:
- ✓FRITZ!Box owners (no extra hub needed)
- ✓Price-conscious smart home beginners
- ✓Privacy-conscious users (no cloud)
- ✓Tenants with a FRITZ!Box
- ✓Anyone who uses Alexa/Google (no HomeKit)
Less suitable for:
- ✕Apple HomeKit users
- ✕Anyone without a FRITZ!Box
- ✕Matter ecosystem planners
- ✕Anyone who wants geofencing
AVM FRITZ!DECT 302 compared with alternatives
Head-to-head with the top alternatives from our radiator thermostats comparison
| Feature | AVM FRITZ!DECT 302 | tado° V3+ | Bosch Smart Home II [+M] | Homematic IP compact |
|---|---|---|---|---|
| Wireless | DECT ULE | 868 MHz + Bridge | Zigbee / Matter | 868 MHz HmIP |
| Hub needed? | FRITZ!Box | Yes (in set) | Optional | Access Point / CCU3 |
| Smart home | MyFRITZ!, Alexa, Google | Alexa, Google, HomeKit, Matter | Alexa, Google, HomeKit (Matter) | Alexa, Google |
| Battery | >1 heating season (3× AA) | 6 to 24 months (2× AA) | >2 years (2× AA) | about 2 yrs (2× AA) |
| Matter | No | Yes | Yes | No |
| Price | from €50 | from €150 | from €40 | from €40 |
Similar radiator thermostat models
Frequently asked questions about the AVM FRITZ!DECT 302
Do I absolutely need a FRITZ!Box?
Does it work without internet/cloud?
How long does the battery last?
Can I control it with Alexa?
Will it fit my radiator?
What is the difference from the FRITZ!DECT 301?
Verdict: is the AVM FRITZ!DECT 302 worth it?
A safe choice in its class: if you can live with a FRITZ!Box being required, from €50 you mainly get one thing: no extra hub. It suits best: FRITZ!Box owners (no extra hub needed).
If you want to compare alternatives, you will find detailed data and reviews on our radiator thermostats comparison page.
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