[Note: this version uses SI units only] The 2009 Radiant Time Series (RTS) Method Load Calculation Spreadsheets (in SI units) are intended as an educational tool both for the student and for the experienced engineer wishing to explore the RTS method. They conform to content in the examples found in Chapter 18, Nonresidential Cooling and Heating Load Calculations, of the 2009 ASHRAE Handbook - Fundamentals.
These spreadsheets allow the user to perform RTS cooling load calculations for lights, people, equipment, walls/roofs, and fenestration components. Calculate component loads for design day weather profiles for any month. Weather data for stations in the United States, Canada, and elsewhere around the world from the 2009 - Fundamentals volume are included for ease of user selection.

Calculate cooling and heating loads for individual rooms or block load zones. Use the 12-month cooling calculations to determine the month and time of peak cooling load for each room or block load zone. Room/zone worksheets can be copied and modified within the spreadsheet to analyze as many rooms or zones as desired; the number of rooms/zones is limited only by the available computer memory.

System Requirements: WinZip, Adobe Acrobat, and Microsoft Excel. File size is 43 MB, so we recommend a broadband internet connection when attempting to download. Zip file includes 3 files totaling 102 MB.