Before buying an Aqara thermostat for a radiator, check the valve—not just the heating system. The Aqara Radiator Thermostat E1 (SRTS-A01) is a smart thermostatic radiator valve, not a universal wall thermostat for controlling any boiler. It is intended for supported thermostatic radiator valves, and Aqara says it does not directly support manual valves, return temperature limiter (RTL) valves, or monotube radiator systems.
1. Check whether your radiator valve is compatible
The E1 attaches to a valve on an individual radiator. Aqara specifies an M30×1.5 mm threaded connection and includes adapters for RA, RAV, and RAVL valve types. Aqara describes the included adapters as compatible with “the majority of radiator valves,” but that does not mean every valve or heating setup will fit.
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- Directly documented: M30×1.5 mm connections, plus the included RA, RAV, and RAVL adapters.
- Not directly supported: manual radiator valves, RTL valves, and monotube radiator systems.
If your existing valve is not one of the supported types, Aqara says conversion with an aftermarket adapter may be possible in many cases. Fit depends on the exact valve, so do not assume a generic adapter will work; ask a professional installer or an official distributor if you are unsure. See Aqara’s Radiator Thermostat E1 product page and official specifications for the documented compatibility details.
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2. Check the hub and ecosystem you plan to use
The E1 communicates over Zigbee 3.0, and Aqara says an Aqara Zigbee 3.0 hub is required. Check that you have a compatible Aqara hub—or include one in your setup—and verify support for the specific platform and functions you want.
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- Apple Adaptive Temperature - With the Apple Home app, Adaptive Temperature uses your iPhone to adjust the thermostat based on activity states like 'home', 'sleep', 'away' and 'extended away'. This provides comfort upon arrival home and saves energy when away, without the complicated steps of creating or managing schedules. (Note: Adaptive Temperature requires a home hub (Apple TV or HomePod) and an iPhone or Apple Watch, all running version 26 or later.)
- Apple Clean Energy Guidance: Smarter Energy Savings - With the Apple Home app, Clean Energy Guidance makes small temperature adjustments to use cleaner grid times when electricity may cost less, while maintaining comfort. The forecast is personalized for your home location using environmental and grid data. (Note: Clean Energy Guidance is available only in the contiguous U.S.)
- Easy Installation with Wide HVAC Compatibility - Designed to fit most homes, W200 works with about 85% of HVAC systems, including furnaces, air conditioners, heat pumps, boilers, and PTAC units. No C-wire? Simply add the Aqara C-Wire Adapter (sold separately) for stable power. We even include a trim kit to easily cover old wiring and keep your wall looking clean and fresh.
- Functions as a Smart Display for Your Front Door - W200 works as a visual control panel for your Aqara video doorbell (only compatible with G410/G400, G4 excluded) and smart lock, showing visitor snapshots right on the screen and letting you unlock the door with a simple tap. No need to open an app on your phone or run to the door.
- Control Your Climate Your Way: App, Voice Assistant, or One-Tap Button Control – You can manually adjust the temperature via the app, or through voice assistants like Alexa or Siri when connected. You can also use the W100 wireless sensor (sold separately) for quick one-tap physical control. Perfect for easy changes from the couch, bed, or anywhere in your home.
Aqara lists Apple HomeKit, Alexa, Google, and IFTTT support. It describes Matter support as an update for supported Aqara hubs; this is not a guarantee that every Aqara hub or every ecosystem supports every feature. Consult Aqara’s product page for its current compatibility information before choosing a hub.
3. Decide whether you need a separate temperature sensor
The E1 has a built-in temperature sensor, but its position close to the radiator can affect how well its reading represents the rest of the room. Aqara warns that vertical installation may produce inaccurate readings. Its manual says an external Aqara temperature sensor is required for more accurate control in the illustrated mounting methods.
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- 【Material】The thermostatic radiator heads are made of high quality materials with fine workmanship and good performance, which are practical to use, not easily deformed or damaged.
- 【Package】In this package, you will receive 2 thermostatic radiator heads, which take up little space, and are convenient and useful. Please refer to the picture for the product size.
- 【Advantage】Thermostatic radiator valve heating system has anti-freeze protection and adjustment function which can provide adjustment help.
- 【Easy to Install】The thermostatic radiator with 5 levels of modulation and is easy to install, if you need to turn off the thermostat, just use the modulation index arrow 0.
- 【Application】The radiator thermostat valve can be use on towel rails, column radiators, panel central heating radiators, vertical flat tube radiators.
You can connect an Aqara Temperature and Humidity Sensor or TVOC monitor for readings from elsewhere in the room. That sensor is an optional accessory for room-level measurement; it is separate from the Aqara Zigbee hub, which Aqara requires. If room temperature is what you want the radiator to regulate, consider where the E1 will sit and whether you want to add an external sensor. Aqara’s user manual explains the mounting and sensor guidance.
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Installation is not just a matter of attaching the E1. Aqara says to mount it within five minutes after powering it on, then calibrate the valve. Calibration can be started by pressing the thermostat’s button three times or, after the device is connected to the network, through the app.
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- [Vehicle Fitment]: Compatible with Hyundai Elantra 2021-2024 L4 1.6L, Ioniq 2017-2022 L4 1.6L; Compatible with Kia Niro 2017-2023 L4 1.6L
- [Reference Number]: 1212-190, 1212190, 2550003HB0
- [Specifications]: ① Start to Open Temperature (℃): 88 ② Gasket or Seal Included: Yes ③ Material: Metal and Rubber ④ Package Quantity: 1 ⑤ Packaging Type: Box
- [Benefits]: The A-Premium engine coolant thermostat is manufactured using advanced production techniques and undergoes rigorous quality control to ensure superior durability and reliability. It effectively regulates heat dissipation, ensuring the engine operates within the appropriate temperature range.
- [Buy with Confidence]: A-Premium offers a one-year unlimited-mileage guarantee on our meticulously crafted Engine Coolant Thermostat. We offer a wide variety of automotive accessory categories, ensuring that you can hit the road with peace of mind.
Aqara’s installation guidance says horizontal mounting gives more accurate temperature readings than vertical mounting. If the valve is hard to identify, access is awkward, or you are uncertain about conversion or fitting, consult an installer rather than forcing the device onto the radiator. See the Aqara FAQ and installation overview for its setup instructions.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.5. Review the practical specifications
| Item | Aqara’s stated specification |
|---|---|
| Product and model | Radiator Thermostat E1, SRTS-A01 |
| Wireless protocol | Zigbee 3.0 |
| Connection and adapters | M30×1.5 mm threaded connection; adapters for RA, RAV, and RAVL |
| Power and included batteries | 3 V DC from two 1.5 V AA batteries; two batteries are listed in the box |
| Dimensions | 57 mm diameter × 89 mm |
| Operating temperature range | 0–40°C |
Aqara advertises battery life of up to one year and notes that actual usage can change it. Treat that as the manufacturer’s estimate, not a guaranteed replacement interval: no independent battery-life test is established in the cited material. The product’s full details are on Aqara’s specifications page.
Quick Recap
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- Note: Aqara Hub E1 only supports 2.4 GHz Wi-Fi. It can connect up to 128 Aqara devices (*use of repeaters such as the Aqara Smart Plug or Aqara Smart Wall Switch(With Neutral) is required). Zigbee 3.0 Support, enjoy the benefits of the fastest, most stable, and energy-efficient smart home technology. (** Not supporting third-party Zigbee devices)
- Flexible and Small Size: The Hub E1 shaft angle can be changed within 210 degrees, which makes its placing extremely flexible. The Smart Hub E1 is compact and very easy to carry, size: 4.25” x 1.18” x 0.3”, weight: 58 grams. Occupies less space and can be placed almost anywhere.
- All-Round Compatibility: All-Round Compatibility: The Aqara Hub E1 enables connected Aqara child devices to work with popular smart home platforms like Apple HomeKit, Amazon Alexa, Google Assistant, and IFTTT. Please ensure both the Hub E1 and your iOS device are updated to the latest firmware. Note: The Hub E1 itself is not directly controllable via third-party apps; it acts as a bridge to expose compatible Aqara devices. Platform support may vary by device.
- Powered by USB-A: A regular USB-A port is integrated into the Hub's housing so that it can be powered from almost any USB-equipped device such as a power bank, power strip, outlet, PC, or even a router.
- Wi-Fi Repeater Function: The Hub E1 not only expands your Zigbee network but also acts as a Wi-Fi 2.4 GHz repeater and makes the coverage of other Aqara hubs and other Wi-Fi devices more stable. Please note: Only 2 devices are supported.
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What to confirm before you buy
- Identify the exact radiator valve type and check it against the M30×1.5 mm connection or included RA, RAV, and RAVL adapters.
- Confirm that your system is not using a manual valve, RTL valve, or monotube radiator arrangement that Aqara lists as unsupported.
- Allow for an Aqara Zigbee 3.0 hub and verify the hub supports the ecosystem features you need.
- Decide whether the built-in sensor’s position is suitable or whether you want an optional external Aqara sensor.
- Make sure you can fit and calibrate the E1 safely, and seek installer advice if valve compatibility is uncertain.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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