General Life ILLONA HT25S RF

ILLONA HT25S RF is a General Life wireless room thermostat. The room unit communicates with a separate RF receiver, which switches compatible equipment through its relay.

Model Identification

Manufacturer: General Life
Series: ILLONA
Model: HT25S RF
Category: Wireless room thermostat
Connection: Radio link to receiver; receiver relay to equipment

Room Thermostat Specifications

Dimensions (manufacturer order)85.7mm / 85.7mm / 33.5mm

Power supply3V DC (2 x AAA alkaline batteries)

Temperature measurement figure (manufacturer-reported)0.1°C

Operating sensitivity (manufacturer-reported)(-2.0°C) – (+2.0°C)

Setpoint range(5°C) – (30°C)

Battery life (manufacturer-reported)1 year (2 x AAA)

Ambient operating temperature(-10°C) – (+50°C)

Storage temperature(-20°C) – (+60°C)

Receiver Specifications

Power supply230V (AC)

Dimensions (manufacturer order)90mm / 90mm / 25mm

Relay NO switching current (resistive load)7A (240VAC – resistive load) 10A (120VAC – resistive load)

Ambient operating temperature(-10°C) – (+50°C)

Storage temperature(-20°C) – (+60°C)

Specification scope: These values apply to the RF configuration. The thermostat and receiver have different power supplies. The receiver’s mains supply must not be confused with the equipment’s thermostat input. Relay ratings are for resistive loads. The 0.1°C measurement figure is manufacturer-reported and does not establish an independent ±0.1°C accuracy claim.

Compatibility and Installation

Confirm that the heating or cooling equipment supports the receiver’s on/off relay connection, and follow the exact equipment and thermostat manuals. The RF link replaces the cable between room unit and receiver; the receiver still needs power and an equipment connection. Electrical installation should be performed by a qualified installer.

Wireless thermostats · ILLONA series · General Life manufacturer

Official Resources

Technical data checked against the model-specific manufacturer RF product page on 11 October 2026. An explicitly matching model-family RF manual was also checked.

Official ILLONA HT25S RF Product Page
Official Model-Family RF User Manual
Official Wireless Catalog

AirAlign is an independent informational resource and is not affiliated with General Life.

Installation decisions for ILLONA HT25S RF

Separate radio and relay units: The mobile room unit is 85.7mm / 85.7mm / 33.5mm and has 3V DC (2 x AAA alkaline batteries) supply; the receiver is 90mm / 90mm / 25mm and accepts 230V (AC). Do not mix up their wiring and electrical-safety duties. The room thermostat must be situated where it measures representative air temperature, while the mains-powered receiver needs safe access and wiring.

Contact capacity: The receiver’s normally-open relay is shown as 7A (240VAC – resistive load) 10A (120VAC – resistive load) at the indicated resistive load. Check heat-source on/off input type, wire insulation and any external power/inductive load rather than assuming this family rating applies to every boiler.

Temperature and RF commissioning: ILLONA HT25S RF lists (5°C) – (30°C) as its setpoint span and (-2.0°C) – (+2.0°C) as its operating sensitivity. A negative-to-positive sensitivity adjustment must not be mislabelled sensor accuracy. Test actual radio range, pairing, power-loss and lost-communication behavior with the delivered receiver.

Product scope: Compare any wired or app-enabled sibling as a separate ordering variant, not a guaranteed compatible replacement. Manufacturer model-sheet, firmware/receiver version and terminal diagram remain definitive.