After determining the load requirements for heating, cooling, ventilation, and other mechanical systems, the next critical step in the design process is system selection and equipment sizing. This phase ensures that all mechanical systems, such as HVAC, plumbing, fire protection, and energy recovery, are appropriately chosen and sized to meet the building’s operational needs while optimizing energy efficiency.

Properly selecting and sizing mechanical equipment ensures that systems will perform reliably and efficiently over their lifespan, avoiding both over-sizing, which can lead to unnecessary energy consumption, and under-sizing, which can result in system failures or inadequate performance.

This section covers the essential aspects of selecting and sizing HVAC systems, plumbing and fire protection equipment, and energy-efficient technologies that contribute to sustainable building operations. It also ensures compliance with relevant building codes, regulations, and energy standards, ultimately improving the building’s operational efficiency and comfort for its occupants.