QwickLoad uses the ASHRAE TFM (Transfer Function Method) algorithms combined with a screen interface that provides building load calculations. It includes a Duct Sizing Program and supports IP and SI units. QwickLoad Residential 7.0 provides heat gain and heat loss calculations for up to 10 zones. QwickLoad Commercial 7.0 provides heat gain and heat loss calculations for up to 500 zones. Zones and plenums can be added or deleted with one button click. Intuitive screens for entering building information. Default is automatically displayed. Construction types for roofs, walls, partitions, windows, shade types, and scheduling control. Complete air-conditioning and heating system control and supply, return, heating and cooling duct static pressure specification. Energy recovery ventilator can be added. Full-color PDF user manual is bookmarked throughout. Error check message dialogs describe errors and include corrective action. Includes load check for individual zones. Built-in automatic outside air summer and winter design temperatures enables user to view the building load as zones or components are added. Load calculation enables user to review the building load and see errors or missing data.