Smart Home Energy 
If you have traditional radiators and want room-by-room heating control without a full smart thermostat install, the Kasa KE100 valves screw on in minutes and let you schedule or geofence each room — no rewiring, no boiler changes, just smarter heating where you need it.
Problem it solves
Reduces heating costs by allowing room-by-room temperature control and scheduling on existing radiators, preventing wasted heating in empty rooms.
Who it's for
Homeowners or renters with traditional radiators who want to control heating room-by-room without replacing their boiler or installing a whole-home smart thermostat.
Why we recommend
Good option for zonal heating control, especially if you have other Tapo devices.
Savings
- Typical annual saving
- £75–£150/year depending on home size and current heating habits
- Payback period
- Under 1 year per valve (at £40) if replacing manual TRVs in frequently empty rooms; 1–2 years for whole-home rollout
