Products & Manufacturers / Room Thermostats / Wired Thermostats / General Life ILLONA HT15S
GENERAL LIFE · ROOM THERMOSTAT

General Life ILLONA HT15S

ILLONA HT15S 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: HT15S
Category: Room thermostat

Key Specifications — ILLONA HT15S (Wired)

Dimensions (H/L/W)85.7mm / 85.7mm / 30.1mm
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 HT15S 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.
Document revision: The current product pages and the shared HT15 / HT15S / HT16S manual report different case depths (30.1 mm and 33.65 mm respectively). The dimensions above follow the linked source. Compare the shared manufacturer manual and confirm the exact hardware revision before installation.

Related Pages

ILLONA series · General Life

Official Resources

Source: General Life’s ILLONA HT15S wired product specification. Technical data checked on 11 October 2026.

Official ILLONA HT15S Wired Product Page

AirAlign is an independent informational resource.

Application and replacement analysis — ILLONA HT15S

Room mounting: The stated 85.7mm / 85.7mm / 30.1mm form factor and 3V DC (2 x AAA Alkaline Battery) power supply define important ILLONA HT15S 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 HT15S 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.