Programmable Dual-Mode Thermostat

230V AC input, 16A maximum load capacity. Plug-in form factor with integrated blue backlit display for consistent readability regardless of ambient lighting. Supports independent configuration of heating-only, cooling-only, or auto-switching dual-mode operation. Timer system includes both countdown (single-event) and cycle (repeating) functions. Manufactured with flame-resistant ABS casing. Approximate dimensions: 85 mm (L) × 55 mm (W) × 110 mm (H); unit weight: 220 grams. Temperature measurement uses a calibrated internal NTC thermistor with ±0.5°C typical accuracy across 0–40°C range. All settings — including setpoint, hysteresis, timer durations, and mode preference — are stored in non-volatile memory and persist through power loss. Interface consists of four tactile buttons with clear visual feedback from display icons and backlight intensity changes. Deployed effectively in diverse settings: maintain stable air quality in home offices by triggering extraction fans during high-CO₂ periods; manage thermal inertia in garden rooms by starting heating 30 minutes prior to expected use; adapt greenhouse environments across seasons by combining night-time anti-frost heating with daytime ventilation cooling — all managed from one physical interface.