Aqara Radiator Thermostat E1
Top Rated

Aqara Radiator Thermostat E1

3.8
970 ratings
Launch Year: 2022

Model: SRTS-A01

12% OFF
€41.99
€36.99
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Our review

Aqara Radiator Thermostat E1 Review: Easy Zigbee Heating Control With a Durability Catch

Simple HomeKit and Home Assistant setup with external sensor support, tempered by reports of parts wearing out after a couple of heating seasons.

The verdict

The Aqara Radiator Thermostat E1 is a Zigbee valve that pairs quickly with Aqara's own hub and works especially well for Apple Home and Home Assistant users who pair it with an external temperature sensor for more accurate room control. Owners consistently praise how easy it is to install and automate, including geofencing and frost protection, but a meaningful share of long-term users report the motor, mounting splines, or pairing reliability degrading after a year or two of daily use. It is a good value pick for a first foray into zone heating, best suited to buyers willing to keep an eye on battery life and mounting hardware over time.

Best for
  • Apple HomeKit and Home Assistant households
  • Multi-zone heating setups with external sensors
  • Budget-conscious buyers new to smart TRVs
  • Users comfortable with occasional battery/maintenance checks

Pros

  • Fast, reliable pairing with Home Assistant, Zigbee2MQTT and Apple HomeKit
  • Supports external temperature sensors for more accurate room control
  • Geofencing warms the home before you arrive
  • Frost protection guards against frozen pipes
  • On-device LCD screen shows current temperature
  • Long battery life reported by many long-term users

Cons

  • Some units develop mechanical issues or lose pairing after a year or two
  • Valve motor can be audibly noisy when adjusting
  • Scheduling is manual only, no automatic learning or AI suggestions
  • Samsung SmartThings and Matter support are listed as coming soon, not yet available
  • Requires a Zigbee hub, no direct Wi-Fi or Bluetooth connection

Who is the Aqara Radiator Thermostat E1 for?

This radiator valve targets smart home owners who want per-room heating control without rewiring anything, especially those already in the Aqara or Zigbee ecosystem. It fits well in Apple HomeKit and Home Assistant setups (via a Zigbee hub such as the Aqara Hub M3 or a Zigbee2MQTT dongle), and it is a natural upgrade for anyone pairing it with an Aqara Temperature and Humidity Sensor to get more accurate room readings than the valve's built-in sensor alone.

What buyers love

The most consistent praise is how straightforward setup is: reviewers across Home Assistant, Apple HomeKit and Aqara's own app describe pairing as fast and trouble-free, often installing several units across a home in one sitting. The ability to connect an external temperature sensor for better calibration, run geofencing so heating ramps up before you arrive home, and rely on frost protection to guard pipes are frequently called out as genuinely useful, practical features rather than gimmicks. Several long-time owners report multiple years of use on the same 2x AA batteries, and the on-device LCD screen and manual schedule controls are appreciated for quick adjustments without opening an app.

What to know before you buy

The clearest recurring caveat is long-term durability: a number of owners with multiple units running for a year or two report failures, ranging from the plastic mounting splines becoming brittle and breaking on certain radiator valve types, to the motor mechanism popping the housing loose, to units losing their Zigbee pairing and needing to be re-added. Some also describe the valve motor as audibly noisy when adjusting, and note that automatic (schedule-learning) control and AI heating suggestions are not part of this model, scheduling is manual only. Samsung SmartThings and Matter support are listed as coming rather than available today, so buyers on those ecosystems should wait or look elsewhere for now.

Is the Aqara Radiator Thermostat E1 worth it?

For the price, the E1 packs in the fundamentals that matter for smart heating, external sensor support, geofencing, frost protection, and solid HomeKit and Home Assistant compatibility, making it an easy recommendation for a first smart TRV purchase. The main trade-off is longevity: most buyers get trouble-free service, but the pattern of mechanical wear and pairing drop-offs after extended use means it is worth budgeting for occasional replacements rather than expecting a decade of maintenance-free operation.

Frequently asked questions

Does the Aqara Radiator Thermostat E1 need a hub?

Yes. It connects over Zigbee only, so it needs a Zigbee hub such as the Aqara Hub M3 or a Zigbee2MQTT-compatible coordinator, it has no built-in Wi-Fi or Bluetooth.

Does it work with Apple HomeKit?

Yes, Apple HomeKit is supported alongside Google Home, Alexa, Home Assistant and IFTTT. Samsung SmartThings and Matter support are marked as coming soon.

Can I use an external temperature sensor with it?

Yes, it supports connecting an external sensor, such as an Aqara Temperature and Humidity Sensor placed elsewhere in the room, for more accurate readings than the valve's built-in sensor alone.

Does it have frost protection?

Yes, frost protection is built in to help prevent pipes from freezing in cold weather.

What batteries does it use and how long do they last?

It runs on 2x AA batteries rated for about a year of use, though several long-term owners report getting notably longer service between changes.

How reliable is it long term?

Most owners report smooth day-to-day operation, but some report mechanical wear, such as brittle mounting parts or motor issues, or dropped Zigbee pairings after a year or two of continuous use.

At a glance

Summary

Everything this radiator valve supports, grouped by category.

Size & Materials
1.1 × 9.7 × 6.5 in (27.9 × 246.4 × 165.1 mm)5.3 oz (150 g)
Connectivity
Zigbee (Zigbee Hub required)
Integrations
Google HomeAlexaApple HomeKitHome AssistantIFTTTMatter (Aqara Hub required)
Display
LCD
Sensors
Temperature
Scheduling
Manually
Features
External Temperature SensorsGeofencingFrost ProtectionDisplay Temperature

Price History

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Company
Aqara logo

Aqara

4.1/ 5 avg ratingChina flagHeadquartered in China

Aqara makes a broad and affordable range of smart home devices, including sensors, smart locks, cameras, switches and its own hubs. The brand is known for strong support of Apple HomeKit, Matter and Zigbee, making its products a favorite for users mixing ecosystems. Aqara hubs let inexpensive Zigbee sensors bridge into HomeKit, Alexa and Google Home.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Size & Materials

Dimensions

1.1 × 9.7 × 6.5 in (27.9 × 246.4 × 165.1 mm)

Weight

5.3 oz (150 g)

Power

Battery Type

2x AA

Battery Life

1 year

Connectivity

2.4 GHz WiFi

NO

5 GHz WiFi

NO

Bluetooth

NO

Z-Wave

NO

Zigbee

Zigbee Hub required

Thread Protocol

NO

Integrations

Google Home

YES

Alexa

YES

Apple HomeKit

YES

Samsung SmartThings

SOON

Home Assistant

YES

IFTTT

YES

Matter

Aqara Hub required

Display

Screen

YES

Screen Type

LCD

Sensors

Temperature

YES

The thermostat has a built-in temperature sensor, which is used to detect the temperature around the radiator and provide auxiliary temperature control. You can also use the Connect the Temperature Sensor function with the Aqara Home app to network with the Aqara Temperature & Humidity Sensor, to get a better temperature control experience.

Humidity

NO

Scheduling

Manually

YES

Automatically

NO

Suggestions

NO

Features

External Temperature Sensors

YES

The Thermostat can receive the temperature readings directly from the connected Aqara Temperature and Humidity Sensor from another corner of the room, even in HomeKit!

Geofencing

YES

The geofencing technology will start the heating before arriving home.

Frost Protection

YES

Child Lock

?

Display Temperature

YES

Automations

YES

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