I bought one of these 10 years ago for a bomb shelter in an old lead mine 100 ft deep under ground! It sat for 3 years in this damp enviroment without any harm! I removed it, and use it around my home for back up when our electric goes out or need to run a tool in the field! I did my home work for years on generators before buying one! This is the best of the best! Spend the little extra for the lot more in this wonderfull machine! By the way--its still runs like brand new!! AAAAA+++++