Carrier SDL

The System Design Load (SDL) program calculates design cooling and heating loads for commercial buildings to facilitate HVAC system design. System Design Load advances the art of HVAC load estimating by introducing the concept of system-based design. System-based design is a technique which considers specific HVAC system features when performing load estimating and system sizing calculations. This is important because many systems have unique features which require special sizing procedures. For example, consider Single Zone CAV, VAV, and Fan Powered Mixing Box systems. All contain different components and operate in different ways. To provide high quality system sizing data, the special features of each must be considered when sizing the system. In the past, HVAC load estimating programs calculated room loads and airflow rates, and system airflow rates and coil loads without considering