If your business is healthy and growing, you may soon find it necessary to install a safe to keep your cash and sensitive documents secure during the workday. Business safes come in all shapes and sizes, but they’re lumped into one of two categories, depending on what they guard against best: fire or theft.

Fireproof safes are generally made to protect vital documents: private information, deeds, stocks, and sensitive data. Your average legal document will be destroyed at around 450 degrees, Fahrenheit. Since a structure fire burns at roughly 1300 degrees, that fireproof safe has to be able to hold off an enormous amount of heat.

Fireproof safes keep documents cool by releasing moisture into the interior. Depending on the level of fireproofing you choose, the safe you purchase will be able to protect your most important files in a burning building for a time span between 30 minutes and several hours.

If you’re in the retail or restaurant industry, or if your company handles a large influx of cash each day, you will probably need a deposit safe to guard against thieves. Deposit safes, unlike home safes, are firmly anchored to the floor. They don’t have the moisture-releasing power of a fireproof safe, but they do have extra sophisticated locking mechanisms that would keep even a professional lock breaker busy for hours. No matter how dense or high-tech your safe may be, it should not be trusted to protect your money overnight. Leave that level of security to the bank.