Manual stoves are a lot of friggin work! If you consider anything but gas, know your not going to keep a steady internal temp 24/7, in your garage. That means hot/warm/cool/cold/condensation, refreeze. Not good for anything. Your packing up your paint cans, aerosols, and anything you do not want to freeze and bringing them into the house. Temperature swings are never good for seals, liquids, tools, and god know what else. If you value you stuff...keep the garage at least above freezing 24/7, at a constant temp, however you do it.