Installing ethanol fireplace inserts safely requires maintaining a minimum 1-meter clearance from walls and combustible materials. Larger units with 15-18 kW output need 1.2 meters spacing. This safety requirement prevents surrounding surfaces from reaching ignition temperatures around 90°C. Installation guidelines include maintaining adequate rear, side, and overhead clearance, using non-combustible floor protection, and ensuring proper ventilation. Special environments like high altitudes or small rooms require additional clearance adjustments to prevent overheating, fire risks, and system failures.