Which pipes is air handler 3A connected to?

To understand the connection for air handler 3A, the focus is on the types of pipes it utilizes. When analyzing the various systems in HVAC designs, air handlers often require connections to either heating, cooling, or both systems to properly regulate indoor climate.

The correct choice indicates that air handler 3A is not connected to both heating and cooling pipes. This suggests that the air handler is designed to operate solely with one type of system, either heating or cooling, but not both simultaneously. This is a common configuration in specific HVAC applications where the air handler is dedicated to either maintaining warm air during winter months or cool air during summer months, but not both at the same time.

This understanding aligns with systems designed for specific climates or building needs, where the versatility of using both heating and cooling is not necessary or can be managed by different air handlers. Therefore, determining the connection of air handler 3A is important for ensuring proper system functionality and efficiency in the HVAC setup.