LoadCairn / comparison guide
LoadCairn vs spreadsheet sizing
Spreadsheet sizing is a planning method that uses formulas and inputs stored in workbook cells. It offers flexibility and reviewability, but most sizing still happens in workbooks someone built years ago. That works until a reviewer asks where a number came from.
Comparison table
| Criteria | LoadCairn | Spreadsheet |
|---|---|---|
| Where the formula lives | On the page, next to the result | In cells, often hidden or overwritten |
| Sources | ASHRAE, NIST and manufacturer references on each calculator | Whatever the author typed in, if anything |
| Versions | One current version for everyone | Copies multiply by email |
| Custom logic | Eight fixed calculations | Anything you can build |
| In the field | Installable app, works offline | Needs the file and a spreadsheet app |
| Output | Pro plan: PDF report and CSV export | The workbook |
When to use each
Choose the right planning tool.
Keep the spreadsheet for site-specific logic and long equipment lists. It offers flexibility and reviewability for custom workbooks. Use LoadCairn when the number has to be checked by someone else. It also helps when you need a quick estimate away from your desk.