At what threshold of refrigerant must equipment be placed in a machinery room?

The correct threshold of refrigerant at which equipment must be placed in a machinery room is 6.6 lbs. This regulation is in place to ensure safety and compliance with environmental standards. The presence of refrigerants in quantities exceeding this threshold can pose significant risks during leaks or equipment failures, thus requiring that equipment be housed in a designated machinery room. Such a room is designed to contain any leaks, manage safety concerns, and provide the appropriate ventilation to prevent the buildup of harmful refrigerants in occupied spaces.

The establishment of this threshold serves to protect both the equipment and the individuals who may be working nearby, ensuring that proper safety protocols are followed as per industry regulations. Additionally, it aligns with best practices in HVAC design and installation, ensuring that larger systems can be adequately serviced and maintained in a safe environment.