A:AnswerIt depends on the size of the garage. For a small to maybe medium sized garage gym this would be fine. For a large garage, you might want to get a propane heater.
A:AnswerNo, it stays off. When turn on again, it always starts in the default setting of high. When you adjust the temperature setting, the last temperature setting will be displayed.
A:AnswerIts not quiet, but not overly loud. About average. You definitely notice it when it turns on, but after a few minutes, you get used to it. White background noise.
A:Answertypical houses have 15 amp fuses per section of the house. This heater uses 12.5 amps on the high setting and 7.5 amps on the low setting. I use this in my office with a desktop, mini fridge, and dual monitors and have had no issues. However, I usually use it on the low setting. It will just depend on what other electronics you are using in the same room/fuse section.