Homematic IP Heizkörperthermostat Basic HmIP-eTRV-B-2 - Smart Wireless Control For Individual Radiators

Homematic IP Heizkörperthermostat Basic HmIP-eTRV-B-2 is a compact wireless radiator thermostat designed to replace a mechanical valve and add programmable, app-based control to individual radiators. The device is powered by 2x 1.5 V AA batteries and offers a typical battery life of about 2 years, making it suitable for long-term use without frequent battery changes.Technical data on the Homematic IP site

Design, dimensions and installation

The Homematic IP Heizkörperthermostat Basic uses a standard M30 x 1.5 mm threaded connection, which is common on many radiator valves and is supported with adapters like Danfoss RA in starter sets.Connection specification from the manufacturer The housing measures approximately 57 x 68 x 102 mm (W x H x D) and weighs about 185 g including batteries, so it adds only a modest footprint to the front of the radiator valve.Dimensions referenced in the heating starter set basic

The thermostat is rated to operate at ambient temperatures from 0 to 50 °C and carries an IP20 protection class, which indicates protection against solid objects larger than 12.5 mm but no specific water protection.IP rating and ambient temperature specification Typical installation involves removing the existing manual valve head, attaching the Homematic IP thermostat to the M30 x 1.5 mm connection, and using the supplied adapter if the radiator uses a different standard thread.

Power, radio and control options

For power, the Homematic IP Heizkörperthermostat Basic relies on two LR6/Mignon/AA cells with a supply voltage of 2x 1.5 V and a maximum current consumption of 100 mA.Supply voltage and current values The radio module operates in the 868.0-868.6 MHz and 869.4-869.65 MHz bands, with a typical open area range around 250 m, which is designed for reliable communication within a home while minimizing interference with other devices.Radio frequency range data

Control options include direct operation through the device's front buttons and integration with a Homematic IP Access Point and smartphone app. When connected to the access point, users can define heating schedules, temperature setpoints and automation rules; the thermostat also supports push-to-pair stand-alone operation for simpler setups.Control solutions listed by Homematic IP

Integration and usage in heating systems

Homematic IP Heizkörperthermostat Basic is designed to work both in stand-alone mode and as part of a larger smart heating setup. In stand-alone push-to-pair mode, the thermostat can maintain programmed temperature settings for the radiator it controls without requiring a central gateway.Operating modes described by Homematic IP When used with the Homematic IP Access Point, it becomes part of a wireless network where multiple thermostats and sensors can coordinate to optimize comfort and energy use.Heating starter set overview

In Europe, the thermostat is marketed as a way to configure individual heating profiles, including daily temperature schedules and integration with window contacts that detect open windows. Sets combining the thermostat with window and door contacts are documented with the ability to adjust heating when a window is open, helping avoid unnecessary energy use.Window and door contact integration

Comparison and placement in the market

Compared with the non-basic Homematic IP radiator thermostat, which has slightly different dimensions of about 58 x 71 x 97 mm and a typical open area radio range of around 300 m, the Homematic IP Heizkörperthermostat Basic is a bit more compact at 57 x 68 x 102 mm and has a listed open area RF range of about 250 m.Standard radiator thermostat specificationsBasic model specifications Both models share the same supply voltage of 2x 1.5 V AA cells and are rated for ambient temperatures from 0 to 50 °C, but the battery life is described as typically around 2 years for the basic model as well, aligning with many electronic radiator valves in this category.Typical battery life details

In terms of functionality, Homematic IP Heizkörperthermostat Basic fits into the segment of programmable wireless radiator thermostats that provide per-room control rather than whole-house central control. Devices in this segment commonly support multiple temperature changes per day and integration with smart home platforms; the Homematic IP ecosystem links thermostats with access points and other devices to deliver that type of programmable, app-managed heating control.Function type and wireless connection

Use case and limitations

Homematic IP Heizkörperthermostat Basic HmIP-eTRV-B-2 is aimed at users with individual radiators who want to add programmable control without changing the central boiler or installing wired controllers. The standard M30 x 1.5 mm connector, 2x 1.5 V AA power and wireless 868 MHz band make it suitable for retrofitting in many European-style heating systems where each radiator has its own valve.Connector and radio data from Homematic IP At the same time, IP20 protection and 0 to 50 °C ambient temperature rating frame its use indoors and on typical radiator locations rather than in outdoor or damp environments.

From a practical perspective, the most notable aspects are the combination of wireless connection, two-year typical battery life and compatibility with Homematic IP access points and partner solutions. These characteristics place the thermostat among smart home radiator valves that emphasize programmability and integration, while the physical dimensions and weight align with a compact design suitable for multi-room installations where several radiators are controlled separately.