General Life ARUNA HT15

ARUNA HT15 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: ARUNA
Model: HT15
Category: Room thermostat

Key Specifications — ARUNA HT15 (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 ARUNA HT15 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.

ARUNA series · General Life manufacturer

Official Resources

Source: General Life’s ARUNA HT15 wired product specification. Technical data checked on 11 October 2026.

Official ARUNA HT15 Wired Product Page

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

Engineering selection — ARUNA HT15

Wall fit and supplied power: ARUNA HT15 lists housing dimensions 85.7mm / 85.7mm / 30.1mm; its compact form should be checked against the actual wall plate and existing wiring route. The thermostat is specified with 3V DC (2 x AAA Alkaline Battery). Do not confuse the wired relay connection with a mains-powered room unit.

Heating input: Its listed normally-open relay load is 2A/30VDC (Resistive Load) 0.5A/125VAC (Resistive Load). Those resistive-load figures do not license direct switching of all boiler voltages or inductive loads. Check the boiler’s thermostat terminals, any low-voltage dry-contact requirement and the wiring diagram before specifying a replacement.

Comfort and cycling: The documented user setpoint span is (5°C) – (30°C) and the operating sensitivity entry is (-2.0°C) – (+2.0°C). A ±2°C-style setting range is not the same as temperature-measurement accuracy; use the manual to resolve hysteresis and configuration. A similarly named RF or SMART suffix is a different integration configuration and must not inherit this wired unit’s relay or power data.

Selection boundary: The dimensions, supply and controller values above come from the recorded exact-model source; feature availability, contact loading and installation approvals still require current maker documentation for the ordered revision.

ARUNA HT15 — selectable response interval

ARUNA HT15 is shown with a selectable operating-sensitivity interval in the maker’s common HT15/HT15S/HT16S documentation. The thermostat’s slim 30.1 mm square depth may be a mounting consideration versus an HT25’s listed 33.5 mm depth. Record how the manufacturer’s actual sensitivity menu governs heating cycles; do not interpret the reported 0.1°C temperature figure as an independent ±0.1°C room-control error. Check load and NO wiring.