How high should equipment and appliances be suspended above adjoining grade?

The requirement for suspending equipment and appliances above adjoining grade is primarily to protect them from water intrusion, debris, pests, and other environmental factors that could affect their operation and longevity. Choosing to suspend equipment 6 inches above grade is in alignment with standards that aim to mitigate potential damage, particularly in areas prone to flooding or heavy precipitation.

This height provides a sufficient buffer to keep the equipment safe while maintaining access for maintenance and inspections. It reflects best practices in HVAC installations and is typically mandated by building codes to ensure the equipment operates efficiently and remains functional over time. The selected height strikes a balance between protection and practicality, making it the recommended choice in many jurisdictions.