Products & Manufacturers / Room Thermostats / Wired Thermostats / General Life ILLONA HT250S
GENERAL LIFE · ROOM THERMOSTAT

General Life ILLONA HT250S

ILLONA HT250S is a General Life room thermostat. This profile documents the wired version’s published technical data and keeps other manufacturer-listed configurations separate.

Model Identification

Manufacturer: General Life
Series: ILLONA
Model: HT250S
Category: Room thermostat

Key Specifications — ILLONA HT250S (Wired)

Dimensions (H/L/W)85mm / 125mm / 24mm
Power supply (manufacturer: Operating Current)3V DC (2 x AAA Alkaline Battery)
Relay NO Switching Current2A/30VDC (Resistive Load) 0.5A/125VAC (Resistive Load)
Temperature measurement accuracy (manufacturer-reported)0.1°C
Operating sensitivity (manufacturer-reported)(-2.0°C) – (+2.0°C)
Setpoint range (manufacturer: Operating Temperature Range)(5°C) – (30°C)
Battery Life1 Year (2 x AAA)
Ambient operating temperature(-10°C) – (+50°C)
Storage Temperature(-20°C) – (+60°C)
Specification scope: These values refer to the wired ILLONA HT250S only. RF and SMART versions have separate receiver, power and connectivity requirements. The manufacturer’s 0.1°C measurement figure is reproduced as reported; it is not an independently established ±0.1°C accuracy claim. Check the current manual and exact variant before installation.

Related Pages

ILLONA series · General Life

Official Resources

Source: General Life’s ILLONA HT250S wired product specification. Technical data checked on 11 October 2026.

Official ILLONA HT250S Wired Product Page

AirAlign is an independent informational resource.

Application and replacement analysis — ILLONA HT250S

Room mounting: The stated 85mm / 125mm / 24mm form factor and 3V DC (2 x AAA Alkaline Battery) power supply define important ILLONA HT250S installation constraints. A wired thermostat can still use batteries; the boiler connection and thermostat’s own supply are distinct. Check mounting depth, wall finish and access for battery changes.

Electrical matching: Contact data 2A/30VDC (Resistive Load) 0.5A/125VAC (Resistive Load) describe a specified resistive load. Obtain the heat source’s control-input diagram to confirm open/close logic, voltage and isolation; motor or pump control cannot be inferred from a low-current thermostat contact rating.

Control settings: The recorded temperature setpoint window is (5°C) – (30°C), with manufacturer sensitivity (-2.0°C) – (+2.0°C). A negative-to-positive adjustment entry should not be advertised as a ±2°C sensor measurement tolerance. Compare this with occupant preferences, heating inertia and switching frequency before commissioning.

Exact configuration: Do not migrate the ILLONA HT250S wired specifications to a similarly named wireless or smart variant; receiver mains supply, connectivity and switch circuitry require separate identification and current General Life technical documents.