The 20 kw Trane Home Standby Generator features stainless steel enclosure suitable for saltwater regions, a 1-liter automotive engine that is liquid cooled. It will operate on propane or natural gas fuel. The housing is powder coated and features a convex lid so rain will run off easy. When utility power is out this generator will supply clean power for extended run times. Item is refurbished not used meaning fuel and oils have been ran through it and as such cannot be sold as new.