A good example calculation utilizing the optional technique is shown in Table 2. A good example load calculation utilizing the normal technique is shown in Table 1. Spreadsheets are somewhat more versatile than word processors connected to their capability to manipulate substantial amounts of rows and columns of information. From our example, you can add a few things you might need to finish your spreadsheet. Yes, developing a spreadsheet will most likely be a part of the procedure, but there's far more besides. An HVAC calculation can be carried out so that you're confident in the operation of the new system. Manual J HVAC load calculations learn how much heating and cooling a home actually needs.