Mississauga enclosure and accessory manufacturer, Rittal has a history of making information accessible on their website. This includes the latest version of a handy software tool for determining optimal climate control for enclosures.
Therm 5.14 is designed to quickly and accurately determine the correct and effective climate control requirements of enclosures. This program also provides full documentation of all calculations. Detailed documentation can be printed out or transferred to your favourite word-processing program. All calculations are in accordance with VDE 0660, part 507 and DIN 3168 for enclosure air conditioners.
Therm 5.14 is free to download and comes in a reasonably sized package, weighing in at 36 MBs. You can download it from the software section of the Rittal site.