Final answer:
The size of the drain line for condensate depends on the volume of condensate being discharged. Typically, a 1/2-inch drain line is sufficient for residential HVAC systems, but a larger 3/4-inch drain line may be required for larger amounts of condensate.
Step-by-step explanation:
The size of the drain line for condensate depends on the volume of condensate being discharged. Typically, for residential HVAC systems, a 1/2-inch drain line is sufficient for most applications. However, if there is a large amount of condensate being collected and discharged, a larger 3/4-inch drain line may be required to ensure proper drainage and prevent clogs.