General Life MITRA HT220S

MITRA HT220S 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: MITRA
Model: HT220S
Product category: Room thermostat

Key Specifications — MITRA HT220S (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 MITRA HT220S 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.

Manufacturer-Listed Configurations

The official General Life catalog lists this model in wired and wireless (RF) configurations, and also lists a smart configuration. These are distinct variants; installation and electrical specifications must be checked for the exact version.

MITRA series · General Life manufacturer

Official Resources

Source: General Life’s MITRA HT220S wired product specification. Technical data checked on 11 October 2026.

Official MITRA HT220S Wired Product Page

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

Engineering selection notes — MITRA HT220S

Physical and power compatibility: The published MITRA HT220S dimensions are 85mm / 125mm / 24mm, identifying the wider landscape faceplate for wall placement. The room unit’s listed supply is 3V DC (2 x AAA Alkaline Battery). A wired heating-control connection does not by itself mean the thermostat is powered by building mains.

Switching-circuit check: The cited relay specification is 2A/30VDC (Resistive Load) 0.5A/125VAC (Resistive Load). This is a contact rating under its stated load conditions—not a universal boiler compatibility statement. Confirm dry-contact versus powered-input requirements, voltage, wiring isolation and inductive loading at the receiving appliance before installation.

Temperature control and variant comparison: The product card lists a setpoint span of (5°C) – (30°C) and sensitivity of (-2.0°C) – (+2.0°C). A sensitivity entry containing −2.0°C to +2.0°C needs its precise adjustment definition checked in the model manual; it should not be represented as a ±2°C sensor-accuracy tolerance. The MITRA HT220S wired configuration must be compared separately with any RF-receiver or smart-connectivity suffix. Similar General Life series facias do not prove identical switching ratings or features.

Evidence boundary: These engineering checks interpret the model figures already recorded above; they are not a new manufacturer accuracy, performance or certification claim. Use the linked exact-model General Life document for commissioning, firmware/features and current revision.

MITRA HT220S — differentiate the S suffix

HT220S retains the manufacturer-listed wired rectangular 85×125×24 mm form and 3 V two-AAA supply but represents a distinct model from HT220. Do not assume ‘S’ adds an RF radio or Wi-Fi interface; review the exact maker display/menu and manual instead. Determine the proper boiler NO contact wiring, allowable relay load and configured switching sensitivity. The RF and smart naming variants have distinct power and installation requirements.