Smart Radiator Valve
Kasa KE100 Review

Smart TRV  |  Needs Kasa Hub KH100  |  M30 x 1.5 + adapters  |  2x AA, over a year  |  Alexa and Google

Overview

The Kasa KE100 is TP-Link’s smart thermostatic radiator valve. It needs the Kasa Hub KH100 and the Kasa app (Tapo’s FAQ says the Tapo app is not supported). It fits M30 x 1.5 valves, with RA, RAV and RAVL adapters in the box, and Tapo says it is for thermostatic valves, not manual ones.

It runs on 2 AA alkaline batteries for over a year. Tapo lists schedules that run without internet while the hub works, geofencing, groups, a child lock, frost protection (about 5°C) and a manual knob that works offline. Up to 32 valves can join one hub. With a Tapo T110 on the same hub it can detect open windows, and a T310 or T315 can correct its temperature reading. It works with Alexa and Google.

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Key Features

✓Needs the Kasa Hub KH100 and Kasa app
✓Fits M30 x 1.5; RA, RAV and RAVL adapters included
✓2x AA alkaline, over a year
✓Up to 32 valves per hub
✓Schedules run without internet; geofencing; groups
✓Open-window detection with a Tapo T110
✓Standard, Powerful and Gentle modes; Summer Mode
✓Alexa and Google; child lock; frost protection

Pros & Cons

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
− No Home Assistant support

Which Version Should You Buy?

✓Kasa KE100 KIT — KH100 hub plus a KE100 valve. Check latest price at Amazon
✓Kasa KE100 (add-on) — An extra valve for an existing KH100 hub. Check latest price at Amazon

Setup & Installation

Buy the KE100 KIT if you do not have a KH100 hub. Set up the hub on 2.4GHz Wi-Fi in the Kasa app, then add each valve.

Fit the valve onto a thermostatic valve body (M30 x 1.5, or with an adapter) and hand-tighten the nut. Tapo says never to turn the body to tighten it.

Common Problems & Fixes

Running into issues? Our Kasa KE100 troubleshooting guide covers step-by-step fixes taken from Tapo’s own guides, including not heating, won’t pair with the hub, keeps going offline.

Who Should Buy It

Anyone who wants room-by-room radiator control and is happy to use the Kasa app.

Verdict

The KE100 gives you smart radiator control with useful offline features. Remember it needs the KH100 hub and the Kasa app, and Tapo does not say it switches your boiler.

As an Amazon Associate I earn from qualifying purchases.