Hama Smart Radiator Thermostat (Extension) at a glance
In short: the Hama Smart Radiator Thermostat (Extension) scores 7,6/10 in our thermostat review (from €25). Biggest strength: cheap retrofit. Main compromise: usable only with a hub.
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.
Hama Smart Radiator Thermostat (Extension): what works, what doesn't?
What works well
- Cheap retrofit: as a single device the most affordable way to extend the Hama system by another room
- Batteries included: two AA batteries and an adapter set are included, ready to use immediately
- Same core functions: schedules, away mode, frost protection and open-window detection as on the set thermostat
- Tool-free installation: old control off, new thermostat on, adapters fit all common valves
Points of criticism
- Usable only with a hub: works exclusively with the hub from the Hama starter set, useless without an existing set
- Disposable batteries: AA operation instead of a rechargeable battery means regular changes and running costs
- No solo operation: not suitable as a stand-alone smart thermostat, purely an add-on
Specifications in detail
| Type | Smart radiator thermostat (extension) |
| What is in the box | 1× thermostat, 2× AA batteries, adapter set |
| Requirement | Hub from the Hama starter set needed |
| Control | Hama Home app via Wi-Fi |
| Power supply | 2× AA batteries (included) |
| Functions | Schedules, away mode, frost protection, open-window detection |
| Valve protection | Anti-calcification function |
| Mounting | Tool-free, adapters for all valves |
Build quality & everyday use
What carries the Hama Smart Radiator Thermostat (Extension) in everyday use: cheap retrofit (as a single device the most affordable way to extend the Hama system by another room) and batteries included (two AA batteries and an adapter set are included, ready to use immediately). We have to be honest about the weaknesses: usable only with a hub. It works exclusively with the hub from the Hama starter set and is useless without an existing set.
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 Hama Smart Radiator Thermostat (Extension) suited to? (buying advice)
Perfect for:
- ✓Existing customers with a Hama hub
- ✓Retrofitting individual rooms
- ✓Price-conscious users expanding the system
Less suitable for:
- ✕Beginners without a starter set
- ✕Anyone looking for a stand-alone thermostat
Similar thermostat models
Frequently asked questions about the Hama Smart Radiator Thermostat (Extension)
Does the extension work without the starter set?
When is the single extension worth it?
Which functions does the extension thermostat offer?
Are batteries and adapters included?
Verdict: is the Hama Smart Radiator Thermostat (Extension) worth it?
A solid option with a clear profile: if you can live with it being usable only with a hub, from €25 you get mainly one thing: a cheap retrofit. It suits best: existing customers with a Hama hub.
If you want to compare alternatives, you will find detailed data and reviews on our thermostats comparison page.
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