What is the common design cycle condenser split for units rated at 13 SEER?

The common design cycle for a condenser split in units rated at 13 SEER is typically understood to be around 20°F. This temperature split refers to the difference between the refrigeration effect in the evaporator and the outdoor temperature at the condenser.

In HVAC systems, a consistent temperature split helps in maintaining efficiency and performance. For units operating at a Seasonal Energy Efficiency Ratio (SEER) of 13, achieving a 20°F temperature difference during the design cycle allows the system to operate within its optimal performance range. This split ensures that the refrigerant can effectively absorb heat inside the evaporator and release it at the condenser, maximizing cooling efficiency and delivering reliable performance throughout the cooling season.

Choosing a lower or higher temperature split, such as 10°F or 25°F, would usually translate to improper operation and potential inefficiencies, making 20°F the most common and appropriate choice for units rated at this level of SEER.