What must the international mechanical code regulate regarding mechanical systems?

The international mechanical code focuses on permanently installed systems because these systems are designed to remain in place and operate over time, often requiring adherence to specific safety standards, efficiency guidelines, and operational protocols. Permanently installed systems include heating, ventilation, air conditioning (HVAC), refrigerating systems, and exhaust systems, among others. These systems are critical for ensuring comfort, indoor air quality, and safety in various buildings, which is why compliance with established codes is necessary.

In contrast, temporary installations, residential settings, and systems excluding ventilation do not receive the same level of regulatory focus within the international mechanical code. Temporary installations often have different regulations due to their short-term nature and varying compliance requirements. Residential systems, while certainly significant, are covered under various local codes alongside the international mechanical code, which addresses broader community standards. Lastly, excluding ventilation would not align with the comprehensive intent of the code, as ventilation is a fundamental component of any mechanical system to ensure proper air flow and quality. Hence, focusing on permanently installed systems is essential for maintaining safety and efficiency across mechanical applications.