I can honestly say that Time Capsule is one of my favorite Apple products. I have a 1TB Time Capsule at home that holds backups for three of my machines. It’s a beautiful thing when I come home from a long day at work, open up my MacBook Pro and see the Time Machine wheel start spinning as it automatically starts my backup. Despite my personal adoration for the Time Capsule, it’s been getting some flack on the internet because “it gets hot.”
One thing to remember about the Time Capsule is that it houses a 3.5” server-grade hard drive. A hard drive is comprised of spinning platters and they do get hot; not hot enough to melt their plastic housing, or injure someone, but fairly warm nonetheless. The Time Capsule also has an internal fan and temperature sensors that monitor the internal temperature to ensure the device is performing within the proper temperature range.
Despite those features, we do occasionally get returns from people who are afraid their Time Capsule is running too hot. Nine out of ten times we stress-test the Time Capsules and never f