General Life ARUNA HT300S

ARUNA HT300S 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: HT300S
Category: Room thermostat

Key Specifications — ARUNA HT300S (Wired)

Dimensions (H/L/W)85mm / 125mm / 20mm

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 HT300S 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.

ARUNA series · General Life

Official Resources

Source: General Life’s ARUNA HT300S wired product specification. Technical data checked on 11 October 2026.

Official ARUNA HT300S Wired Product Page

AirAlign is an independent informational resource.

Selection and wiring assessment — ARUNA HT300S

Installation footprint: The manufacturer-linked card gives 85mm / 125mm / 20mm for this wider rectangular room thermostat, with a room-unit supply of 3V DC (2 x AAA Alkaline Battery). Confirm mounting clearance, service access, battery replacement and the actual cable entry when replacing a differently shaped wall control.

Contact and appliance interface: The quoted relay switching condition is 2A/30VDC (Resistive Load) 0.5A/125VAC (Resistive Load). A normally-open, resistive-load rating must be distinguished from powered control inputs and boiler/heat-pump requirements; never treat the contact as automatically suitable for a 230 V inductive load. Confirm the receiving device’s control-voltage and switching method before installation.

Setpoint and control behavior: ARUNA HT300S lists (5°C) – (30°C) for its selectable room setting and (-2.0°C) – (+2.0°C) as operating sensitivity. An adjustable negative-to-positive sensitivity span is not a stated measurement-accuracy band. Evaluate switching cycling and the heat source’s response time, especially if retrofitting a slow underfloor loop.

Revision check: Keep the ARUNA HT300S wired SKU separate from any RF receiver or SMART platform even if the series and faceplate resemble each other. This model-specific comparison uses recorded manufacturer fields; order-code details and approvals must be checked with the linked current official documentation.

ARUNA HT300S — verify control/feature list

ARUNA HT300S is sold as a wired battery-powered room controller, not a smart Wi-Fi device merely because the series has smart versions. Check the factory user-control functions, hysteresis options and 5–30°C normal setting range before specifying a zone. Existing boiler interface voltage and relay current must agree with the particular wired model’s NO contact. Model appearance and housing size should be matched when replacing an ARUNA HT2xx unit.