Radiator Thermostat Comparison · UK 2026
Kasa KE100 vs Aqara Radiator Thermostat W600

Specs, pros and cons compared side by side

Both the Kasa KE100 and the Aqara Radiator Thermostat W600 are smart radiator heating controls. This head-to-head sets them side by side using the specs, pros and cons from our full reviews. Kasa specs come from Tapo and TP-Link’s own pages; Aqara specs come from our Aqara review, checked against Aqara’s own pages.

Quick verdict

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Kasa KE100

Pick it for: Sub-GHz link to the KH100 hub and the Kasa app (the W600: Thread with Matter, or Zigbee with an Aqara hub)

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Aqara Radiator Thermostat W600

Pick it for: Matter over Thread with a border router and no Aqara hub (the KE100: needs the Kasa Hub KH100) · Six adapters in the box (the KE100: RA, RAV and RAVL adapters) · Works with HomeKit, SmartThings and Home Assistant (the KE100: Alexa and Google, no Home Assistant support)

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Quick comparison

Spec Kasa KE100 Aqara Radiator Thermostat W600
Connection Sub-GHz to the KH100 hub Thread (Matter) or Zigbee
Hub or bridge needed Kasa Hub KH100 Thread border router, or Aqara Zigbee hub for full features
Power 2x AA alkaline 2 x AA included, up to 2 years
Valve fit M30 x 1.5; RA, RAV, RAVL adapters M30 x 1.5; six adapters included
Smart home Alexa, Google Matter over Thread, plus HomeKit, Alexa, Google, SmartThings, Home Assistant
Kasa KE100

Pros

  • Works offline once set up
  • Adapters included
  • Open-window detection with a T110
  • Tapo sensors can correct the temperature

Cons

  • Needs the KH100 hub (sold in the KIT)
  • Uses the Kasa app, not Tapo
  • Tapo does not say it controls a boiler
Aqara Radiator Thermostat W600

Pros

  • Matter over Thread without an Aqara hub
  • Six adapters in the box
  • Batteries included and rated up to 2 years
  • Quiet, at under 30 dB

Cons

  • Window detection and some features need Zigbee mode and an Aqara hub
  • Switching protocol needs a reset and re-adding
  • TVOC monitor linking is not supported

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Which should you buy?

Why choose the Kasa KE100

  • Sub-GHz link to the KH100 hub and the Kasa app (the W600: Thread with Matter, or Zigbee with an Aqara hub)
Why choose the Aqara Radiator Thermostat W600

  • Matter over Thread with a border router and no Aqara hub (the KE100: needs the Kasa Hub KH100)
  • Six adapters in the box (the KE100: RA, RAV and RAVL adapters)
  • Works with HomeKit, SmartThings and Home Assistant (the KE100: Alexa and Google, no Home Assistant support)

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