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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Before buying an Aqara thermostat for your heating, check the valve on your radiator first. The Aqara Radiator Thermostat E1 (SRTS-A01) is a smart radiator valve, not a universal wall thermostat for controlling any boiler. It works only with compatible thermostatic radiator valves and also requires an Aqara Zigbee 3.0 hub.
Will the Aqara E1 fit your radiator valve?
Start by identifying the valve fitted to the 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 making the E1 compatible with “the majority of radiator valves,” but that does not mean every valve or heating system is supported. See Aqara’s Radiator Thermostat E1 product page and official specifications.
- Directly supported: compatible thermostatic radiator valves, including the listed M30×1.5, RA, RAV and RAVL connections.
- Not directly supported: manual radiator valves, return temperature limiter (RTL) valves and monotube radiator systems.
- Other valve types: Aqara says conversion with an aftermarket adapter may be possible in many cases, but compatibility depends on the exact valve. Do not assume a generic adapter will fit; ask a professional installer or official distributor if you cannot identify the valve.
If your system has no thermostatic radiator valve, the E1 is not a drop-in replacement for a central wall thermostat or a control for any boiler. Confirm the valve type before ordering the Aqara Radiator Thermostat E1.
Do you need an Aqara hub?
Yes. The E1 uses Zigbee 3.0, and Aqara states that an Aqara Zigbee 3.0 hub is required. Check that the specific hub you own—or plan to buy—is compatible with the E1 and the features you want. The product page lists Apple HomeKit, Alexa, Google and IFTTT support, and describes Matter support as an update for supported Aqara hubs. That does not establish that every hub or ecosystem implementation offers every feature.
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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.
The hub is a requirement for the thermostat; a separate room sensor is not. Check Aqara’s product overview and specifications against your intended setup before buying.
Do you need a separate room temperature sensor?
Not necessarily. The E1 has a built-in temperature sensor, and Aqara says it can also use readings from a connected Aqara Temperature and Humidity Sensor or TVOC monitor. An external sensor is an optional accessory, but it may be useful if you want the thermostat to base control on temperature measured away from the radiator.
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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.
Mounting matters: the built-in sensor is close to the radiator, and Aqara’s manual warns that vertical installation may produce inaccurate readings. For the illustrated mounting methods, the manual says an external Aqara temperature sensor is required for more accurate control; Aqara’s installation article also says horizontal mounting provides more accurate temperature readings than vertical mounting. Consult the E1 user manual and Aqara’s installation overview for the relevant mounting guidance.
Can you install and calibrate it on your radiator?
Allow time to fit and calibrate the E1 rather than treating installation as simply screwing on a replacement. Aqara’s FAQ says to mount the thermostat within five minutes after powering it on. Once fitted, calibrate the valve by pressing the thermostat’s button three times, or use the app after networking. Follow the Aqara FAQ and the product’s installation instructions; if you are unsure about the valve or fitting, ask an installer.
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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.
What are the E1’s power and physical specifications?
| Specification | Aqara-listed detail |
|---|---|
| Product and model | Radiator Thermostat E1, SRTS-A01 |
| Wireless protocol | Zigbee 3.0 |
| Connection and adapters | M30×1.5 mm; adapters for RA, RAV and RAVL |
| Power | 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 usage can affect it. This is the manufacturer’s estimate, not an independently verified battery-life test. Specifications and in-box items are listed on Aqara’s E1 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 radiator valve and check whether it is a compatible thermostatic valve with the specified connection or one of the listed adapter types.
- Rule out unsupported manual, RTL or monotube setups, or get professional advice on whether a suitable conversion is possible.
- Confirm you have a compatible Aqara Zigbee 3.0 hub and that your preferred ecosystem supports the features you intend to use.
- Decide whether the built-in sensor is suitable for your mounting position or whether room-level readings call for an optional external Aqara sensor.
- Check that you can fit the thermostat promptly after powering it on and complete its calibration.
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.
